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Dr. Gulzar Khan

Wissenschaftlicher Mitarbeiter der AG Biodiversität und Evolution der Pflanzen

Forschungsinteressen

I am a molecular ecologist with background in population genetics, phylogenetics, speciation, biodiversity and
conservation. I began my career as a plant systematists & taxonomist and moved into molecular ecology, mainly
working on speciation, biodiversity and conservation utilizing tools from next generation phylogenetics, and
population genetics combined with ecological niche modelling. My research integrates knowledge of genetic
diversity into conservation strategies. Previous research projects include accessing hybridization and
introgression in some Melocactus species from eastern Brazil to see their effects on conservation by using ddRAD-
seq protocol, population genetic structure in an microendemic and threatened cactus species from eastern
Brazil, taxonomic challenges posed by a naturally fragmented system in microendemic cactus species, and
molecular phylogenetics and comparative Phylogeography of Spiroides (Rosaceae) found on the Qinghai-
Tibetan Plateau. I am committed to research about next generation biogeography, population genetics,
evolution, and Phylogenomics to contribute towards conservation issues. 

  • High Priority and Microendemic species
  • Determinants of genetic diversity
  • Genetic Conservation
  • Next generation population genomics
  • Gene Flow 
  • Landscape genomics

Lebenslauf

since 2019

  Research Associate, AG Biodiversität und Evolution der Pflanzen, The Carl von Ossietzky University of Oldenburg, 26129, Germany

July 2018 - December 2018

  Research Assistant, Biosystematics and Taxonomy Lab, Department of Botany, University of Peshawar, Peshawar, Pakistan

May 2015 - June 2018

  Postdoctoral Research Assistant, Laboratory of Genetics and Evolution, Department of Biology, Federal University of Sao Carlos, Campus Sorocaba, Sao Paulo, Brazil.
2011-2015   Ph.D. Biological Sciences, Northwest Institute of plateau Biology; University of Chinese Academy
of Sciences. Advisor: Prof. Dr. Chen Shilong.
Dissertation Title: Molecular Phylogenetics and Comparative Phylogeography of the Genus Spiraea L.
(Rosaceae): Found on the Qinghai-Tibetan Plateau.
2007-2009   Master of Philosophy. (18 years education) Plant Sciences, Department of Plant Sciences, Faculty
of Biological Sciences, Quaid-I-Azam University Islamabad, Pakistan. Advisor: Prof. Dr. Mir Ajab Khan.
Dissertation Title: Morphological, anatomical and Palynological study of the flora of Peshawar, KP, Pakistan.
2004-2006

 

Master of Science in Botany, Department of Botany, University of Peshawar, Pakistan.

Mehr Informationen

Publikationen

  • [article] bibtex
    F. Q. Zhang, Q. B. Gao, D. J. Zhang, Y. Z. Duan, Y. H. Li, P. C. Fu, R. Xing, K. Gulzar, und S. L. Chen, "Phylogeography of Spiraea alpina (Rosaceae) in the Qinghai-Tibetan Plateau inferred from chloroplast DNA sequence variations," Journal of Systematics and Evolution, 2012.
    @article{Zhang2012, abstract = {The aim of the present study was to investigate the phylogeographic patterns of Spiraea alpina (Rosaceae) and clarify its response to past climatic changes in the climate-sensitive Qinghai-Tibetan Plateau (QTP). We sequenced a chloroplast DNA fragment (trnLtrnF) from 528 individuals representing 43 populations. We identified 10 haplotypes, which were tentatively divided into three groups. These haplotypes or groups were distributed in the different regions of the QTP. Only half the populations were fixed by a single haplotype, whereas the others contained two or more. In the central and eastern regions, adjacent populations at the local scale shared the same haplotype. Our phylogeographic analyses suggest that this alpine shrub survived in multiple refugia during the Last Glacial Maximum and that earlier glaciations may have trigged deep intraspecific divergences. Post-glacial expansions occurred only within populations or across multiple populations within a local range. The findings of the present study together with previous phylogeographic reports suggest that evolutionary histories of plants in the QTP are complex and variable depending on the species investigated.},
      author = {Zhang, Fa Qi and Gao, Qing Bo and Zhang, De Jun and Duan, Yi Zhong and Li, Yin Hu and Fu, Peng Cheng and Xing, Rui and Gulzar, Khan and Chen, Shi Long},
      doi = {10.1111/j.1759-6831.2012.00194.x},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Zhang et al. - 2012 - Phylogeography of Spiraea alpina (Rosaceae) in the Qinghai-Tibetan Plateau inferred from chloroplast DNA sequence.pdf:pdf},
      issn = {17596831},
      journal = {Journal of Systematics and Evolution},
      keywords = {Chloroplast DNA,Haplotype,Phylogeography,Qinghai-Tibetan Plateau,Refugia,Spiraea alpina,TrnL-trnF},
      title = {{Phylogeography of Spiraea alpina (Rosaceae) in the Qinghai-Tibetan Plateau inferred from chloroplast DNA sequence variations}},
      year = {2012} }
  • [article] bibtex
    S. E. Arranz, J. Avarre, C. Balasundaram, C. Bouza, N. B. Calcaterra, F. Cezilly, S. Chen, G. Cipriani, V. P. Cruz, C. Daniel, A. Dejean, S. Dharaneedharan, J. D. Iaz, J. Durand, J. Dziadek, F. Foresti, F. Peng-cheng, Q. Gao, G. I. Garc, P. Gauffre-autelin, A. Giovino, M. Goswami, C. Guarino, J. Guerra-varela, N. Gutié Rrez, D. J. Harris, M. Heo, G. Khan, M. Kim, W. S. Lakra, Jé. Ré Mie Lauth, P. Leclercq, J. Lee, S. Lee, S. Lee, T. Lee, H. Liu, S. Liu, P. G. Malé, R. Pal Mandhan, P. Martinez, V. E. Mayer, J. Mendel, N. J. Mendes, F. F. MENDONC ß A, A. Minias, P. Minias, C. Oliveira, O. Orivel, L. Orsini, B. N. G Pardo, A. Perera, G. Procaccini, und C. Rato, "P E R M A N E N T G E MOLECULAR ECOLOGY RESOURCES PRIMER DEVELOPMENT CONSORTIUM," , 2012.
    @article{Arranz2012,
      author = {Arranz, Silvia E and Avarre, Jean-christophe and Balasundaram, Chellam and Bouza, Carmen and Calcaterra, Nora B and Cezilly, Frank and Chen, Shi-long and Cipriani, Guido and Cruz, V P and Daniel, Carla and Dejean, Alain and Dharaneedharan, Subramanian and Iaz, Juan D and Durand, Jean-dominique and Dziadek, Jaros{\l}aw and Foresti, F and Peng-cheng, Fu and Gao, Qing-bo and Garc, Graciela IA and Gauffre-autelin, Pauline and Giovino, Antonio and Goswami, Mukunda and Guarino, Carmine and Guerra-varela, Jorge and {Guti{\'{e}} Rrez},
      Nica and Harris, D J and Heo, Moon-soo and Khan, Gulzar and Kim, Mija and Lakra, Wazir S and {R{\'{e}} Mie Lauth},
      J{\'{e}} and Leclercq, Pierre and Lee, Jeonghwa and Lee, Seung-ho and Lee, Soohyung and Lee, Theresa and Liu, Hongbo and Liu, Shufang and Mal{\'{e}},
      Pierre-jean G and {Pal Mandhan},
      Rishi and Martinez, Paulino and Mayer, Veronika E and Mendel, Jan and Mendes, N J and {MENDONC {\ss} A},
      F F and Minias, Alina and Minias, Piotr and Oliveira, C and Orivel, Ome and Orsini, L and {G Pardo},
      Bel{\'{e}} N and Perera, A and Procaccini, G and Rato, C},
      doi = {10.1111/1755-0998.12095},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Arranz et al. - 2012 - P E R M A N E N T G E MOLECULAR ECOLOGY RESOURCES PRIMER DEVELOPMENT CONSORTIUM.pdf:pdf},
      isbn = {5053450544},
      title = {{P E R M A N E N T G E MOLECULAR ECOLOGY RESOURCES PRIMER DEVELOPMENT CONSORTIUM}},
      year = {2012} }
  • G. Khan, F. Zhang, Q. Gao, Z. Mashwani, K. Rehman, M. A. Khan, und S. Chen, "Journal of Medicinal Plants Research Trichomes diversity in the tropical flora of Pakistan," , vol. 7, iss. 22, pp. 1587-1592, 2013.
    @article{Khan2013, abstract = {Trichomes diversity from the study of foliar epidermal anatomy has been studied for 51 species belonging to 40 genera and 20 families. In the studied plant species, 10 different types of trichomes were observed for both glandular and eglandular types. Among these species, 38 are amphitrichomic while the remaining 13 are either epitrichomic or hypotrichomic. The most frequent types of trichomes were attenuate and uniseriate types.},
      author = {Khan, Gulzar and Zhang, Faqi and Gao, Qingbo and Mashwani, Zia-Ur-Rehman and Rehman, Khalid and Khan, Mir Ajab and Chen, Shilong},
      doi = {10.5897/JMPR11.1336},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Khan et al. - 2013 - Journal of Medicinal Plants Research Trichomes diversity in the tropical flora of Pakistan.pdf:pdf},
      issn = {1996-0875},
      keywords = {Trichomes,eglandular,foliar epidermis,glandular},
      number = {22},
      pages = {1587--1592},
      title = {{Journal of Medicinal Plants Research Trichomes diversity in the tropical flora of Pakistan}},
      url = {http://www.academicjournals.org/JMPR},
      volume = {7},
      year = {2013} }
  • [article] bibtex
    R. Xing, Q. bo Gao, F. qi Zhang, Y. hu Li, P. cheng Fu, J. hua Zhang, J. li Wang, G. Khan, und S. long Chen, "Genetic diversity and population structure of Armillaria luteo-virens (Physalacriaceae) in Qinghai-Tibet Plateau revealed by SSR markers," Biochemical Systematics and Ecology, 2014.
    @article{Xing2014, abstract = {Armillaria luteo-virens is a type of ectomycorrhiza whose fruit body is widely used as an edible mushroom in the Qinghai-Tibetan Plateau. In total, 404 individuals of A. luteo-virens from 23 geographically separate populations were analyzed using eight pairs of SSR markers. The average number of alleles among nine populations was 28.65 with a range from 20 to 38. The mean observed (HO) and expected (HE) heterozygosity ranged from 0.446 to 0.501 and from 0.499 to 0.554, respectively. An analysis of molecular variance (AMOVA) showed that most genetic variation occurred within populations (83.32{\%}). The mean value of FST (0.176) suggested low genetic differentiation among populations. The 23 studied populations were divided into two main clusters based on the NJ dendrogram, which was also confirmed by STRUCTURE analysis. This study may aid in not only the protection of this species but also the management of genetic resources for future artificial cultivation. {\textcopyright} 2014 Elsevier Ltd.},
      author = {Xing, Rui and bo Gao, Qing and qi Zhang, Fa and hu Li, Yin and cheng Fu, Peng and hua Zhang, Jin and li Wang, Jiu and Khan, Gulza and long Chen, Shi},
      doi = {10.1016/j.bse.2014.04.006},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Xing et al. - 2014 - Genetic diversity and population structure of Armillaria luteo-virens (Physalacriaceae) in Qinghai-Tibet Plateau re.pdf:pdf},
      issn = {03051978},
      journal = {Biochemical Systematics and Ecology},
      keywords = {Armillaria luteo-virens,Conservation,Genetic diversity,Population structure,Qinghai-Tibetan Plateau},
      title = {{Genetic diversity and population structure of Armillaria luteo-virens (Physalacriaceae) in Qinghai-Tibet Plateau revealed by SSR markers}},
      year = {2014} }
  • [article] bibtex
    F. Zhang, Q. Gao, G. Khan, K. Luo, und S. Chen, "Comparative transcriptome analysis of aboveground and underground tissues of Rhodiola algida, an important ethno-medicinal herb endemic to the Qinghai-Tibetan Plateau," Gene, 2014.
    @article{Zhang2014, abstract = {Transcriptome sequencing is a powerful tool for the assessment of gene expression and the identification and characterization of molecular markers in non-model organisms. Rhodiola algida L. (Crassulaceae), endemic to the Qinghai-Tibetan Plateau, has long been used in traditional Chinese medicine to prevent altitude sickness and eliminate fatigue. Illumina-based high-throughput transcriptome sequencing of aboveground and underground tissues of R. algida respectively yielded 5.40 million and 5.18 million clean reads. A total of 82,664 unigenes averaging 577. bp in length were generated from the aboveground clean reads, with 86,237 unigenes of 502-bp mean length obtained from the underground tissues. Of 55,028 unigenes compared with sequences in UniProt databases, 20,413 unigenes had significant similarities with existing sequences in NR, NT, Swiss-Prot, GO, KEGG, and COG databases. Single nucleotide polymorphism (SNP) analysis identified 237,294 SNPs from 154,636 contigs of aboveground tissues and 197,540 SNPs from 144,963 underground-derived contigs. The information uncovered in this study should serve as a valuable resource for the characterization of important traits related to secondary metabolite formation and for the identification of associated molecular mechanisms.},
      author = {Zhang, Faqi and Gao, Qingbo and Khan, Gulzar and Luo, Keming and Chen, Shilong},
      doi = {10.1016/j.gene.2014.09.063},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Zhang et al. - 2014 - Comparative transcriptome analysis of aboveground and underground tissues of Rhodiola algida, an important ethno-m.pdf:pdf},
      issn = {18790038},
      journal = {Gene},
      keywords = {Gene expression,RNA-seq,Rhodiola algida,Transcriptome},
      title = {{Comparative transcriptome analysis of aboveground and underground tissues of Rhodiola algida, an important ethno-medicinal herb endemic to the Qinghai-Tibetan Plateau}},
      year = {2014} }
  • [article] bibtex
    Q. Gao, R. Xing, F. Zhang, P. Fu, G. Khan, J. Zhang, X. Jiao, und S. Chen, " Isolation of 16 Microsatellite Markers for Spiraea alpina and S. mongolica (Rosaceae) of the Qinghai–Tibet Plateau ," Applications in Plant Sciences, 2014.
    @article{Gao2014,
      author = {Gao, Qingbo and Xing, Rui and Zhang, Faqi and Fu, Pengcheng and Khan, Gulzar and Zhang, Jinhua and Jiao, Xiujie and Chen, Shilong},
      doi = {10.3732/apps.1300059},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Gao et al. - 2014 - Isolation of 16 Microsatellite Markers for Spiraea alpina and S. mongolica (Rosaceae) of the Qinghai–Tibet Plateau.pdf:pdf},
      journal = {Applications in Plant Sciences},
      title = {{ Isolation of 16 Microsatellite Markers for Spiraea alpina and S. mongolica (Rosaceae) of the Qinghai–Tibet Plateau }},
      year = {2014} }
  • [article] bibtex
    G. Khan, F. Zhang, Q. Gao, P. cheng Fu, R. Xing, J. Wang, H. Liu, und S. Chen, "Molecular phylogeography and intraspecific divergence of Spiraea alpina (Rosaceae) distributed in the Qinghai-Tibetan Plateau and adjacent regions inferred from nrDNA," Biochemical Systematics and Ecology, 2014.
    @article{Khan2014, abstract = {The Qinghai-Tibetan plateau (QTP) uplift had a decisive effect on climatic and eco-environmental evolution in East Asia during the Quaternary. In the current study phylogeographic structure and diversification history of Spiraea alpina across the QTP were investigated for the first time based on nuclear internal transcribed spacer. The nuclear internal transcribed spacers (ITS1a-ITS4) were generated for a total of 284 individuals distributed within 31 natural populations. A clear phylogeographic structure was found for S. alpina. The results showed that this species colonized in three different glacial refugia during the Quaternary extensive glaciation and expanded during the Interglacial period. Analysis of molecular variance (AMOVA) showed 74.13{\%} genetic diversity among populations and 25.87{\%} genetic variation within populations with distinct phylogeographic structure (FST=0.741*). The estimated divergence time revealed that the main lineages of S. alpina diversified during the Quaternary 1.2-0.6 million years ago. The study concluded that severe climatic oscillations during Quaternary and the uplift of QTP had a profound effect on intraspecific divergence of S. alpina.},
      author = {Khan, Gulzar and Zhang, Faqi and Gao, Qingbo and cheng Fu, Peng and Xing, Rui and Wang, Jiuli and Liu, Hairui and Chen, Shilong},
      doi = {10.1016/j.bse.2014.08.013},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Khan et al. - 2014 - Molecular phylogeography and intraspecific divergence of Spiraea alpina (Rosaceae) distributed in the Qinghai-Tibet.pdf:pdf},
      issn = {03051978},
      journal = {Biochemical Systematics and Ecology},
      keywords = {Allopatric divergence,Genetic diversity,Glacial refugia,Phylogeography,Qinghai-Tibetan plateau,Speciation},
      title = {{Molecular phylogeography and intraspecific divergence of Spiraea alpina (Rosaceae) distributed in the Qinghai-Tibetan Plateau and adjacent regions inferred from nrDNA}},
      year = {2014} }
  • [article] bibtex
    S. Chen, Q. Gao, P. Fu, H. Liu, F. Zhang, J. Wang, G. Khan, und R. Xing, "Phylogenetic analyses of Spiraea (Rosaceae) distributed in the Qinghai-Tibetan Plateau and adjacent regions: insights from molecular data," Plant Systematics and Evolution, 2015.
    @article{Chen2015,
      author = {Chen, Shi-Long and Gao, Qing-Bo and Fu, Peng-Cheng and Liu, Hai-Rui and Zhang, Fa-Qi and Wang, Jiu-Li and Khan, Gulzar and Xing, Rui},
      doi = {10.1007/s00606-015-1238-6},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Chen et al. - 2015 - Phylogenetic analyses of Spiraea (Rosaceae) distributed in the Qinghai-Tibetan Plateau and adjacent regions insight.pdf:pdf},
      issn = {0378-2697},
      journal = {Plant Systematics and Evolution},
      title = {{Phylogenetic analyses of Spiraea (Rosaceae) distributed in the Qinghai-Tibetan Plateau and adjacent regions: insights from molecular data}},
      year = {2015} }
  • [article] bibtex
    F. Q. Zhang, S. Y. Lei, Q. B. Gao, G. Khan, R. Xing, H. L. Yang, und S. L. Chen, "Isolation of microsatellite loci for Rhodiola alsia (Crassulaceae), an important ethno-medicinal herb endemic to the Qinghai-Tibetan Plateau," Genetics and Molecular Research, 2015.
    @article{Zhang2015, abstract = {Rhodiola alsia, which has been used widely in traditional Chinese medicine for a considerable time, grows on moist habitats at high altitude near the snow line. Microsatellite loci were developed for R. alsia to investigate its population genetics. In total, 17 polymorphic microsatellites were developed based on ESTs from the Illumina HiSeq(TM) 2000 platform. The microsatellite loci were checked for variability using 80 individuals of R. alsia sampled from four locations on the Qinghai-Tibet Plateau. The total number of alleles per locus ranged from 10 to 20, and the observed heterozygosity ranged from 0.000 to 1.000. The null allele frequency ranged from 0.000 to 0.324. These microsatellites are expected to be helpful in future studies of population genetics in R. alsia and related species.},
      author = {Zhang, F. Q. and Lei, S. Y. and Gao, Q. B. and Khan, G. and Xing, R. and Yang, H. L. and Chen, S. L.},
      doi = {10.4238/2015.May.18.18},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Zhang et al. - 2015 - Isolation of microsatellite loci for Rhodiola alsia (Crassulaceae), an important ethno-medicinal herb endemic to t.pdf:pdf},
      issn = {16765680},
      journal = {Genetics and Molecular Research},
      keywords = {Population genetics,Qinghai-Tibet Plateau,Rhodiola alsia,Simple sequence repeat},
      title = {{Isolation of microsatellite loci for Rhodiola alsia (Crassulaceae), an important ethno-medicinal herb endemic to the Qinghai-Tibetan Plateau}},
      year = {2015} }
  • [article] bibtex
    H. Yang, S. Chen, G. Khan, Q. Gao, S. Lei, F. Zhang, und Y. Li, " Development and Characterization of Polymorphic Microsatellite Loci for Saxifraga egregia (Saxifragaceae) ," Applications in Plant Sciences, 2015.
    @article{Yang2015,
      author = {Yang, Huiling and Chen, Shilong and Khan, Gulzar and Gao, Qingbo and Lei, Shuyun and Zhang, Faqi and Li, Yinhu},
      doi = {10.3732/apps.1500037},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Yang et al. - 2015 - Development and Characterization of Polymorphic Microsatellite Loci for Saxifraga egregia (Saxifragaceae).pdf:pdf},
      journal = {Applications in Plant Sciences},
      title = {{ Development and Characterization of Polymorphic Microsatellite Loci for Saxifraga egregia (Saxifragaceae) }},
      year = {2015} }
  • [article] bibtex
    P. C. Fu, Q. B. Gao, F. Q. Zhang, R. Xing, G. Khan, J. L. Wang, H. R. Liu, und S. L. Chen, "Responses of plants to changes in Qinghai-Tibetan Plateau and glaciations: Evidence from phylogeography of a Sibiraea (Rosaceae) complex," Biochemical Systematics and Ecology, 2016.
    @article{Fu2016, abstract = {The genetic structure and phylogeographical history of the alpine shrubs Sibiraea angustata (Rosaceae) and Sibiraea laevigata from the Qinghai-Tibetan Plateau (QTP) were investigated to identify alpine plant responses to changes in the QTP and glaciations. Fifty-five populations were analyzed using four chloroplast DNA (cpDNA) regions and (nuclear ribosomal internal transcribed spacer) nrITS sequence data. In all, 21 cpDNA haplotypes and 13 nrITS sequence types were detected. Analyses of the genetic diversity and phylogenetic relationships detected two rarely reported glacial refugia. One was the Yushu-Nangqian area, and the other consisted of the area from the Songpan Plateau to the southeastern margin of the QTP. Sibiraea species populations experienced divergent evolution and founder effects when they recolonized the QTP platform and adjacent high-altitude regions following glaciations. The divergence times of the main lineages and haplotypes were in the range of 1.60-2.58 Ma. The population size of Sibiraea species in the QTP decreased approximately 23-fold during the last 0.12 Ma, indicating that Sibiraea species were significantly affected by environmental changes in the QTP. Therefore, the rapid uplift of the QTP and subsequent glaciations likely played an important role in driving genetic divergence and population size changes of Sibiraea species in the QTP.},
      author = {Fu, Peng Cheng and Gao, Qing Bo and Zhang, Fa Qi and Xing, Rui and Khan, Gulzar and Wang, Jiu Li and Liu, Hai Rui and Chen, Shi Long},
      doi = {10.1016/j.bse.2016.01.006},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Fu et al. - 2016 - Responses of plants to changes in Qinghai-Tibetan Plateau and glaciations Evidence from phylogeography of a Sibiraea.pdf:pdf},
      issn = {03051978},
      journal = {Biochemical Systematics and Ecology},
      keywords = {Genetic divergence,Phylogeography,Qinghai-Tibetan Plateau,Sibiraea},
      title = {{Responses of plants to changes in Qinghai-Tibetan Plateau and glaciations: Evidence from phylogeography of a Sibiraea (Rosaceae) complex}},
      year = {2016} }
  • G. Khan, F. Zhang, Q. Gao, P. Fu, R. Xing, J. Wang, H. Liu, und S. Chen, "PHYLOGENETIC RECONSTRUCTION BETWEEN THE OLD AND NEW WORLD SPIROIDES INFERRED FROM PLASTID TRNL-F AND NRDNA ITS SEQUENCES," Pakistan Journal of Botany, vol. 48, iss. 6, pp. 2399-2407, 2016.
    @article{Khan2016a, abstract = {Distribution of similar taxa between the East Asia (old world) and new worlds fascinated the Botanists and Biogeographers since the Linnaean time. The current study represents phylogenetic investigation of 39 Spiraea L., species covering their entire distribution in the new world (America) to the old world (Tibet PR China). In this study we used both plastidial marker (trnL-F) and nuclear internal transcribed spacer (nrDNA ITS). Phylogeny among the species implemented in the program PAUP* while divergence time was calibrated in BEAST 1.7.5. The analysis revealed that all 39 species of the genus are monophyletic. The study further suggested that ancestors of Spiraea were in the new world but their center of diversification is in East Asia. The estimated divergence time showed that S. virginiana endemic to North America is the oldest species with divergence time 21.1 MY. The divergence time of Spiraea species with disjunct distribution in the new world, Europe and East Asia e.g., S. hypericifolia, S. chamaedryfolia, S. douglasii, S. salicifolia and S. latifolia ranged from 7.44-1.83 MY with most during Pliocene (within the last 5 MY). The results concluded that isolation of Spiraea species occurred during the severe eco-climatic fluctuations period throughout the late Tertiary and Quaternary.},
      author = {Khan, Gulzar and Zhang, Fa-qi and Gao, Qing-bo and Fu, Peng-cheng and Xing, Rui and Wang, Jiu-li and Liu, Hai-Rui and Chen, Shi-long},
      doi = {N/A},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Khan et al. - 2016 - Phylogenetic reconstruction between the old and new world spiroides inferred from plastid trnL-F and nrDNA its sequ.pdf:pdf},
      issn = {2070-3368},
      journal = {Pakistan Journal of Botany},
      keywords = {Disjunction,Migration,Phylogeny,Radiation,Vicariance,dispersal},
      number = {6},
      pages = {2399--2407},
      title = {{PHYLOGENETIC RECONSTRUCTION BETWEEN THE OLD AND NEW WORLD SPIROIDES INFERRED FROM PLASTID TRNL-F AND NRDNA ITS SEQUENCES}},
      url = {http://www.pakbs.org/pjbot/PDFs/48(6)/26.pdf},
      volume = {48},
      year = {2016} }
  • [article] bibtex
    G. Khan, P. M. Ribeiro, I. A. S. Bonatelli, M. F. Perez, F. F. Franco, und E. M. Moraes, "Weak population structure and no genetic erosion in Pilosocereus aureispinus: A microendemic and threatened cactus species from eastern Brazil," PLoS ONE, 2018.
    @article{Khan2018b, abstract = {Succulent cacti (Cactaceae) are among the most threatened taxonomic groups assessed to date. Here we evaluated the genetic diversity and population structure of a narrow endemic columnar cactus Pilosocereus aureispinus. This species is only found in a small area of c. 300 km2 of rocky savanna from eastern Brazil and it is currently classified as vulnerable (VU) on the International Union for Conservation of Nature (IUCN) red list. Eight microsatellite loci were genotyped for 91 individuals from four localities of the known P. aureispinus range. In contrast with expectations for narrow endemic species, we found relatively high levels of genetic diversity (e.g., HE = 0.390 to 0.525; HO = 0.394 to 0.572) and very low population structure based on the variation of six loci. All the analyzed individuals were clustered in one unique genetic group in assignment tests. We also generated the sequences of two plastid markers (trnT-trnL and psbD-trnT) and found no variation on a subsample of 39 individuals. We used Landsat 8 images and Normalized Difference Vegetation Index to estimate a potential extent of occurrence of c. 750 km2 for this species. Our results showed that P. aureispinus is not suffering from erosion of nuclear genetic variability due to its narrow distribution. However, we advocate that because of the extremely limited extent of occurrence, the ongoing anthropogenic disturbances in its habitat, and phylogenetic distinctiveness of P. aureispinus, this species should be classified as endangered (EN) on the IUCN Red List. {\textcopyright} 2018 Khan et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.},
      author = {Khan, Gulzar and Ribeiro, Paulianny M. and Bonatelli, Isabel A.S. and Perez, Manolo F. and Franco, Fernando F. and Moraes, Evandro M.},
      doi = {10.1371/journal.pone.0195475},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Khan et al. - 2018 - Weak population structure and no genetic erosion in Pilosocereus aureispinus A microendemic and threatened cactus s.pdf:pdf},
      issn = {19326203},
      journal = {PLoS ONE},
      title = {{Weak population structure and no genetic erosion in Pilosocereus aureispinus: A microendemic and threatened cactus species from eastern Brazil}},
      year = {2018} }
  • [article] bibtex
    Q. Gao, S. Chen, H. Liu, F. Zhang, und G. Khan, " Westwards and northwards dispersal of Triosteum himalayanum (Caprifoliaceae) from the Hengduan Mountains region based on chloroplast DNA phylogeography ," PeerJ, 2018.
    @article{Gao2018, abstract = { The varying topography and environment that resulted from paleoorogeny and climate fluctuations of the Himalaya–Hengduan Mountains (HHM) areas had a considerable impact on the evolution of biota during the Quaternary. To understand the phylogeographic pattern and historical dynamics of Triosteum himalayanum (Caprifoliaceae), we sequenced three chloroplast DNA fragments ( rbcL-accD , rps15-ycf1 , and trnH-psbA ) from 238 individuals representing 20 populations. Nineteen haplotypes (H1–H19) were identified based on 23 single-site mutations and eight indels. Most haplotypes were restricted to a single population or neighboring populations. Analysis of molecular variance revealed that variations among populations were much higher than that within populations for the overall gene pool, as well as for the East Himalayan group (EH group) and the North Hengduan group (NHM group), but not for the Hengduan Mountains group (HM group). Ecoregions representing relatively high genetic diversity or high frequencies of private haplotypes were discovered, suggesting that this alpine herbaceous plant underwent enhanced allopatric divergence in isolated and fragmented locations during the Quaternary glaciations. The current phylogeographic structure of T. himalayanum might be due to heterogeneous habitats and Quaternary climatic oscillations. Based on the phylogeographic structure of T. himalayanum populations, the phylogenetic relationship of identified haplotypes and palaeodistributional reconstruction, we postulated both westwards and northwards expansion from the HM group for this species. The westwards dispersal corridor could be long, narrow mountain areas and/or the Yarlung Zangbo Valley, while the northwards movement path could be south–north oriented mountains and low-elevation valleys. },
      author = {Gao, Qing-bo and Chen, Shi-long and Liu, Hai-rui and Zhang, Fa-qi and Khan, Gulzar},
      doi = {10.7717/peerj.4748},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Gao et al. - 2018 - Westwards and northwards dispersal of Triosteum himalayanum (Caprifoliaceae) from the Hengduan Mountains region base.pdf:pdf},
      journal = {PeerJ},
      title = {{ Westwards and northwards dispersal of Triosteum himalayanum (Caprifoliaceae) from the Hengduan Mountains region based on chloroplast DNA phylogeography }},
      year = {2018} }
  • [article] bibtex
    G. Khan, F. Zhang, Q. Gao, P. Fu, Y. Zhang, und S. Chen, "Spiroides shrubs on Qinghai-Tibetan Plateau: Multilocus phylogeography and palaeodistributional reconstruction of Spiraea alpina and S. Mongolica (Rosaceae)," Molecular Phylogenetics and Evolution, 2018.
    @article{Khan2018a, abstract = {A common hypothesis for the rich biodiversity found in mountains is uplift-driven diversification. Using a multilocus approach, here we assessed the influence of Qinghai-Tibetan Plateau (QTP) uplift and fluctuating regional climate on genetic diversity of two sister spiroides shrubs, Spiraea alpina and S. mongolica. Combined with palaeodistributional reconstruction modelling, we investigated the current and past-predicted distribution of these species under different climatic episodes. The study demonstrated that continuous pulses of retreat and expansion during last glacial-interglacial episodes, combined with the uplifting of QTP shaped the current distribution of these species. All the populations showed high level of genetic diversity based on both cpDNA and SSR markers. The average gene diversity within populations based on cpDNA markers was 0.383 ± 0.052 for S. alpina and 0.477 ± 0.048 for S. mongolica. The observed and expected heterozygosities based on SSR for both Spiraea alpina and S. mongolicawere HE(0.72–0.90)/HO(0.35–0.78) and HE(0.77–0.92)/HO(0.47–0.77) respectively. Palaeodistributional reconstruction indicated species' preferences at southeastern edge of the plateau during last glacial maximum, at higher altitude areas of QTP and range expansion to central plateau during the interglacial episodes. Assignment tests in STRUCTURE, discriminant analysis of principal coordinates and Immigrants analysis in GENECLASS based on nuclear SSR markers did not support the hypothesis of gene flow between both the species. However, maximum likelihood approach based on cpDNA showed sharing of haplotypes between both species.},
      author = {Khan, Gulzar and Zhang, Faqi and Gao, Qingbo and Fu, Pengcheng and Zhang, Yu and Chen, Shilong},
      doi = {10.1016/j.ympev.2018.02.009},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Khan et al. - 2018 - Spiroides shrubs on Qinghai-Tibetan Plateau Multilocus phylogeography and palaeodistributional reconstruction of Sp.pdf:pdf},
      issn = {10959513},
      journal = {Molecular Phylogenetics and Evolution},
      keywords = {Palaeodistributional reconstruction,Phylogeography,Qinghai-Tibetan Plateau,Range shift,Spiraea L.},
      title = {{Spiroides shrubs on Qinghai-Tibetan Plateau: Multilocus phylogeography and palaeodistributional reconstruction of Spiraea alpina and S. Mongolica (Rosaceae)}},
      year = {2018} }
  • [article] bibtex
    M. Xia, Y. Zhang, R. Xing, Z. Tian, Q. Gao, F. Zhang, S. Chen, G. Khan, und J. Yu, "Deep Intraspecific Divergence in the Endemic Herb Lancea tibetica (Mazaceae) Distributed Over the Qinghai-Tibetan Plateau," Frontiers in Genetics, 2018.
    @article{Xia2018, abstract = {Qinghai-Tibetan Plateau (QTP) is an important biodiversity hub, which is very sensitive to climate change. Here in this study, we investigated genetic diversity and past population dynamics of Lancea tibetica (Mazaceae), an endemic herb to QTP and adjacent highlands. We sequenced chloroplast and nuclear ribosomal DNA fragments for 429 individuals, collected from 29 localities, covering their major distribution range at the QTP. A total of 19 chloroplast haplotypes and 13 nuclear genotypes in two well-differentiated lineages, corresponding to populations into two groups isolated by Tanggula and Bayangela Mountains. Meanwhile, significant phylogeographical structure was detected among sampling range of L. tibetica, and 61.50{\%} of genetic variations was partitioned between groups. Gene flow across the whole region appears to be restricted by high mountains, suggesting a significant role of geography in the genetic differences between the two groups. Divergence time between the two lineages dated to 8.63 million years ago, which corresponded to the uplifting of QTP during the late Miocene and Pliocene. Ecological differences were found between both the lineages represent species-specific characteristics, sufficient to keep the lineages separated to a high degree. The simulated distribution from the last interglacial period to the current period showed that the distribution of L. tibetica experienced shrinkage and expansion. Climate changes during the Pleistocene glacial-interglacial cycles had a dramatic effect on L. tibetica distribution ranges. Multiple refugia of L. tibetica might have remained during the species history, to south of the Tanggula and north of Bayangela Mountains, both appeared as topological barrier and contributed to restricting gene flow between the two lineages. Together, geographic isolation and climatic factors have played a fundamental role in promoting diversification and evolution of L. tibetica.},
      author = {Xia, Mingze and Zhang, Yu and Xing, Rui and Tian, Zunzhe and Gao, Qingbo and Zhang, Faqi and Chen, Shilong and Khan, Gulzar and Yu, Jingya},
      doi = {10.3389/fgene.2018.00492},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Xia et al. - 2018 - Deep Intraspecific Divergence in the Endemic Herb Lancea tibetica (Mazaceae) Distributed Over the Qinghai-Tibetan Pl.pdf:pdf},
      journal = {Frontiers in Genetics},
      title = {{Deep Intraspecific Divergence in the Endemic Herb Lancea tibetica (Mazaceae) Distributed Over the Qinghai-Tibetan Plateau}},
      year = {2018} }
  • [article] bibtex
    M. Xia, F. Zhang, H. Rao, X. Chi, G. Khan, Y. Zhang, J. Yu, und S. Chen, "Complete chloroplast genome sequence of Parnassia brevistyla (Celastraceae) and phylogenetic analysis with related species," Mitochondrial DNA Part B: Resources, 2018.
    @article{Xia2018a,
      author = {Xia, Mingze and Zhang, Faqi and Rao, Hua and Chi, Xiaofeng and Khan, Gulzar and Zhang, Yu and Yu, Jingya and Chen, Shilong},
      doi = {10.1080/23802359.2018.1524725},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Xia et al. - 2018 - Complete chloroplast genome sequence of Parnassia brevistyla (Celastraceae) and phylogenetic analysis with related s.pdf:pdf},
      issn = {23802359},
      journal = {Mitochondrial DNA Part B: Resources},
      keywords = {Celastraceae,Parnassia,Saxifragaceae,chloroplast genome,phylogenetic relationship},
      title = {{Complete chloroplast genome sequence of Parnassia brevistyla (Celastraceae) and phylogenetic analysis with related species}},
      year = {2018} }
  • [misc] bibtex
    M. F. Perez, F. F. Franco, J. R. Bombonato, I. A. S. Bonatelli, G. Khan, M. Romeiro-Brito, A. C. Fegies, P. M. Ribeiro, G. A. R. Silva, und E. M. Moraes, Assessing population structure in the face of isolation by distance: Are we neglecting the problem?, 2018.
    @misc{Perez2018, abstract = {{\textless}div class="abstract-group"{\textgreater} {\textless}section class="article-section article-section{\_}{\_}abstract" lang="en" data-lang="en" id="section-1-en"{\textgreater} {\textless}h3 class="article-section{\_}{\_}header main abstractlang{\_}en main"{\textgreater}Abstract{\textless}/h3{\textgreater} {\textless}div class="article-section{\_}{\_}content en main"{\textgreater} {\textless}div class="article-section{\_}{\_}content" id="ddi12816-sec-0001"{\textgreater} {\textless}h3 class="article-section{\_}{\_}sub-title section1"{\textgreater} Aim{\textless}/h3{\textgreater} {\textless}p{\textgreater}To investigate how the potential bias from isolation by distance (IBD) in inferences of population structure has been addressed, in studies aiming biodiversity conservation. {\textless}/p{\textgreater}},
      author = {Perez, Manolo F. and Franco, Fernando F. and Bombonato, Juliana R. and Bonatelli, Isabel A.S. and Khan, Gulzar and Romeiro-Brito, Monique and Fegies, Ana C. and Ribeiro, Paulianny M. and Silva, Gislaine A.R. and Moraes, Evandro M.},
      booktitle = {Diversity and Distributions},
      doi = {10.1111/ddi.12816},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Perez et al. - 2018 - Assessing population structure in the face of isolation by distance Are we neglecting the problem.pdf:pdf},
      issn = {14724642},
      keywords = {biodiversity conservation,isolation by distance,population structure,structure},
      title = {{Assessing population structure in the face of isolation by distance: Are we neglecting the problem?}},
      year = {2018} }
  • [article] bibtex
    G. Khan, M. O. Godoy, F. F. Franco, M. F. Perez, N. P. Taylor, D. C. Zappi, M. C. Machado, und E. M. Moraes, "Extreme population subdivision or cryptic speciation in the cactus Pilosocereus jauruensis? A taxonomic challenge posed by a naturally fragmented system," Systematics and Biodiversity, 2018.
    @article{Khan2018, abstract = {In allopatric systems, where gene flow is highly constrained, the distinction between intraspecific differentiation and speciation is a challenging task. Pilosocereus jauruensis is a columnar cactus restricted to patchy dry habitats of Pantanal, Cerrado, and Chaco biomes in south-western Brazil and neighbouring countries. This species was recently reinstated after having been synonymized with P. machriisi, now including P. paraguayensis, P. saudadensis, and P. densivillosus as its synonyms. These taxa have been placed within the informal Aurisetus group. The present study aimed to investigate the genetic structure of P. jauruensis in order to identify possible distinct evolutionary lineages, and to support further refinement of the taxonomy of this species. For this purpose, 10 microsatellite loci were genotyped for 156 individuals of P. jauruensis. To provide a proxy for the expected interspecific differentiation level within this allopatric system, two populations (49 individuals) of P. vilaboensis (a s...},
      author = {Khan, Gulzar and Godoy, Mariana O. and Franco, Fernando F. and Perez, Manolo F. and Taylor, Nigel P. and Zappi, Daniela C. and Machado, Marlon C. and Moraes, Evandro M.},
      doi = {10.1080/14772000.2017.1359215},
      file = {:C$\backslash$:/Users/Gulzar/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Khan et al. - 2018 - Extreme population subdivision or cryptic speciation in the cactus Pilosocereus jauruensis A taxonomic challenge po.pdf:pdf},
      issn = {14780933},
      journal = {Systematics and Biodiversity},
      keywords = {Cactaceae,Cerrado,conservation,microsatellite markers,species delimitation},
      title = {{Extreme population subdivision or cryptic speciation in the cactus Pilosocereus jauruensis? A taxonomic challenge posed by a naturally fragmented system}},
      year = {2018} }
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