Comparative population genetic analyses suggest hybrid origin of Rhododendron pubicostatum,an endangered plant species with extremely small populations endemic to Yunnan,China  

作　　者：Xuemei Zhang Hantao Qin Weijia Xie Yongpeng Ma Weibang Sun 

机构地区：[1]Yunnan Key Laboratory for Integrative Conservation of Plant Species with Extremely Small Populations,Kunming Institute of Botany,Chinese Academy of Sciences(CAS),Kunming,650201,Yunnan,China [2]Key Laboratory for Plant Diversity and Biogeography of East Asia,Kunming Institute of Botany,Chinese Academy of Sciences(CAS),Kunming,650201,China [3]University of Chinese Academy of Sciences,100049,Beijing,China [4]Flower Research Institute,Yunnan Academy of Agriculture Sciences,Kunming,650201,China

出　　处：《Plant Diversity》2020年第4期312-318,共7页植物多样性（英文版）

基　　金：Science and Technology Basic Resources Investigation Program of China(Grant No.2017FY100100);the Second Tibetan Plateau Scientific Expedition and Research(STEP)Program(Grant No.2019QZKK0502);the Young Academic and Technical Leader Raising Foundation of Yunnan Province(No.2018HB066);Yunnan Innovation Team Program for Conservation and Utilization of PSESP(Plant Species with Extremely Small Populations)(Grant No.2019HC015);Applied Basic Research Project of Yunnan Province(Grant No.2018BB010).

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.

关 键 词：Rhododendron pubicostatum Plant Species with Extremely Small Populations(PSESP) Microsatellite markers Illumina MiSeq sequencing Conservation management 

分 类 号：Q943[生物学—植物学]