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GENETIC POPULATION STRUCTURE OF THE DESERT SHRUB SPECIE

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dc.contributor.author CHEN1, HAIKUI
dc.contributor.author ZENG, LIYAN
dc.contributor.author YONEZAW, TAKAHIRO
dc.contributor.author REN, XIAN
dc.contributor.author ZHONG, YANG
dc.date.accessioned 2022-12-06T06:53:55Z
dc.date.available 2022-12-06T06:53:55Z
dc.date.issued 2014-12-27
dc.identifier.citation Chen, H., Zeng, L., Yonezawa, T., Ren, X., & Zhong, Y. (2014). Genetic population structure of the desert shrub species Lycium ruthenicum inferred from chloroplast DNA. Pakistan Journal of Botany, 46(6), 2121-2130. en_US
dc.identifier.issn 2070-3368
dc.identifier.uri http://142.54.178.187:9060/xmlui/handle/123456789/14748
dc.description.abstract Lycium ruthenicum (Solananeae), a spiny shrub mostly distributed in the desert regions of north and northwest China, has been shown to exhibit high tolerance to the extreme environment. In this study, the phylogeography and evolutionary history of L. ruthenicum were examined, on the basis of 80 individuals from eight populations. Using the sequence variations of two spacer regions of chloroplast DNA (trnH-psbA and rps16-trnK) , the absence of a geographic component in the chloroplast DNA genetic structure was identified (GST = 0.351, NST = 0.304, NST<GST), which was consisted with the result of SAMOVA, suggesting weak phylogeographic structure of this species. Phylogenetic and network analyses showed that a total of 10 haplotypes identified in the present study clustered into two clades, in which clade I harbored the ancestral haplotypes that inferred two independent glacial refugia in the middle of Qaidam Basin and the western Inner Mongolia. The existence of regional evolutionary differences was supported by GENETREE, which revealed that one of the population in Qaidam Basin and the two populations in Tarim Basin had experienced rapid expansion, and the other populations retained relatively stable population size during the Pleistocene . Given the results of long-term gene flow and pairwise differences, strong gene flow was insufficient to reduce the genetic differentiation among populations or within populations, probably due to the genetic composition containing a common haplotype and the high number of private haplotypes fixed for most of the population. The divergence times of different lineages were consistent with the rapid uplift phases of the Qinghai-Tibetan Plateau and the initiation and expansion of deserts in northern China, suggesting that the origin and evolution of L. ruthenicum were strongly influenced by Quaternary environment changes. en_US
dc.language.iso en en_US
dc.publisher Karachi: Pakistan Journal of Botany , Botanical garden , University of Karachi en_US
dc.subject Lycium ruthenicum en_US
dc.subject phylogeography en_US
dc.subject haplotype en_US
dc.subject Qinghai-Tibetan Plateau en_US
dc.subject Quaternary en_US
dc.title GENETIC POPULATION STRUCTURE OF THE DESERT SHRUB SPECIE en_US
dc.type Article en_US


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