Genetic Diversity and Population Structure of Rhododendron longipedicellatum, an Endangered Species

IF 1.7 4区 环境科学与生态学 Q2 BIODIVERSITY CONSERVATION Tropical Conservation Science Pub Date : 2022-01-01 DOI:10.1177/19400829221078112
Yurong Cao, Yongpeng Ma, Zhenghong Li, Xiongfang Liu, Detuan Liu, S. Qu, Hong Ma
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引用次数: 3

Abstract

Rhododendron longipedicellatum is an endangered species endemic to southeastern Yunnan, China. Assessment of genetic variation is critical for protecting endangered species. Therefore, we used EST-SSR markers to analyze the genetic characteristics of R. longipedicellatum. The results revealed high genetic diversity at the species level (He = 0.559, NA = 9.529) and within populations (He = 0.507, NA = 5.910) and moderate genetic differentiation between populations (FST = 0.083). In addition, more genetic variation existed within populations (91.25%) compared with variation among populations (8.75%). The STRUCTURE analysis showed that 150 individuals from five existing populations could best be divided into two genetic groups. At the population level, the neighbor-joining (NJ) tree and principal coordinates analysis (PCoA) analyses also divided them into two groups. In addition, Bottleneck analyses using the Two-Phase Model (TPM) and Stepwise Mutation Model (SMM) as well as the Garza-Williamson Index revealed widespread signatures of bottleneck events. These results provide vital information for scientifically formulating conservation strategies for the endangered R. longipedicellatum.
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濒危物种长柄杜鹃的遗传多样性和种群结构
长梗杜鹃是中国云南东南部特有的濒危物种。评估基因变异对于保护濒危物种至关重要。因此,我们利用EST-SSR标记分析了长柄花的遗传特征。结果表明,物种水平(He=0.559,NA=9.529)和种群内(He=0.507,NA=5.910)具有较高的遗传多样性,种群间遗传分化中等(FST=0.083),群体内部存在较多的遗传变异(91.25%),而群体间存在较多的变异(8.75%)。在种群水平上,邻居连接(NJ)树和主坐标分析(PCoA)也将它们分为两组。此外,使用两阶段模型(TPM)和逐步突变模型(SMM)以及Garza Williamson指数进行的瓶颈分析揭示了瓶颈事件的广泛特征。这些结果为科学制定濒危植物长柄花的保护策略提供了重要信息。
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来源期刊
Tropical Conservation Science
Tropical Conservation Science BIODIVERSITY CONSERVATION-
CiteScore
3.60
自引率
5.90%
发文量
16
审稿时长
>12 weeks
期刊介绍: Tropical Conservation Science is a peer-reviewed, open access journal that publishes original research papers and state-of-the-art reviews of broad interest to the field of conservation of tropical forests and of other tropical ecosystems.
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