Comparative population genetic analyses suggest hybrid origin of Rhododendron pubicostatum, an endangered plant species with extremely small populations endemic to Yunnan, China
文献类型： 外文期刊
作者： Zhang, Xuemei 1 ; Qin, Hantao 2 ; Xie, Weijia 4 ; Ma, Yongpeng 1 ; Sun, Weibang 1 ;
作者机构： 1.Chinese Acad Sci, Kunming Inst Bot, Yunnan Key Lab Integrat Conservat Plant Species E, Kunming 650201, Yunnan, Peoples R China
2.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming 650201, Yunnan, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Yunnan Acad Agr Sci, Flower Res Inst, Kunming 650201, Yunnan, Peoples R China
关键词： Rhododendron pubicostatum; Plant Species with Extremely Small; Populations (PSESP); Microsatellite markers; Illumina MiSeq sequencing; Conservation management
期刊名称：PLANT DIVERSITY （ 影响因子：2.528； ）
ISSN： 2096-2703
年卷期： 2020 年 42 卷 4 期
页码：
收录情况： SCI
摘要： Gene flow between sympatric congeneric plants is thought to be very common and may pose serious threats to endangered species. In the present study, we evaluate the genetic diversity and divergence of three sympatric Rhododendron species in Jiaozi Mountain using newly developed microsatellites through the Illumina MiSeq sequencing approach. Genetic diversity of all three Rhododendron species studied was moderate in comparison to genetic parameters previously reported from species of this genus. Interestingly, genetic structure analysis of the three species identified a possible hybrid origin of the threatened Rh. pubicostatum. This sympatry should be considered a unimodal hybrid zone, since Rh. pubicostatum is predominant here. Unimodal hybrid zones are uncommon in Rhododendron, despite the fact that hybridization frequently occurs in the genus. Issues pertaining to the conservation of Rh. pubicostatum resulting from admixture of genetic material from its parental species are discussed. Copyright (C) 2020 Kunming Institute of Botany, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.
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