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Genetic Diversity and Population Differentiation of Yangtze Finless Porpoise in Poyang Lake

文献类型： 外文期刊

作者： Zhang, Han 1 ; Yin, Denghua 2 ; Que, Jianglong 3 ; Zhu, Xiaoyan 4 ; Lin, Danqing 2 ; Ying, Congping 2 ; Yu, Jinxiang 3 ; Liu, Kai 1 ;

作者机构： 1.Shanghai Ocean Univ, Natl Demonstrat Ctr Expt Fisheries Sci Educ, Shanghai 201306, Peoples R China

2.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Minist Agr & Rural Affairs, Key Lab Freshwater Fisheries & Germplasm Resources, Wuxi 214081, Peoples R China

3.Aquat Conservat & Rescue Ctr Jiangxi Prov, Nanchang 330096, Peoples R China

4.Anqing Aquat Technol Promot Ctr Stn, Anqing 246000, Peoples R China

关键词： Yangtze finless porpoise; Poyang Lake; genetic diversity; genetic differentiation; microsatellite DNA; mitochondrial DNA

期刊名称：ANIMALS （ 影响因子：2.7； 五年影响因子：3.2 ）

ISSN： 2076-2615

年卷期： 2025 年 15 卷 13 期

页码：

收录情况： SCI

摘要： The Yangtze finless porpoise (Neophocaena asiaeorientalis asiaeorientalis; YFP) is the only freshwater cetacean species that remains in the Yangtze River, China. Poyang Lake is connected to the main stream of the Yangtze River, and the number of YFPs in Poyang Lake constitutes approximately half of the total species population. To implement effective conservation measures and formulate scientific genetic management strategies for the YFPs in Poyang Lake, we conducted population genetic analyses on 125 blood samples from the Poyang population and 46 tissue samples from the Anqing population, utilizing mitochondrial DNA D-loop and microsatellite loci. The genetic diversity analysis revealed two haplotypes in the Poyang population, with mitochondrial genetic diversity indices of Hd = 0.481 +/- 0.020 and Pi = 0.00078 +/- 0.00030. Microsatellite markers further demonstrated indices of Ho = 0.610 and He = 0.655. The genetic differentiation analysis indicated that the two populations exhibited moderate genetic differentiation (0.05 < Fst < 0.15). Upon excluding the dead samples from the Anqing population, the genetic differentiation between the two populations increased and the gene flow diminished. This indicated that certain dead samples from the Anqing population might have originated from Poyang Lake or had a background of Poyang Lake-Yangtze River migration and gene exchange. This finding was further corroborated by STRUCTURE analysis, which revealed genetic admixture between the two populations. We assessed the current genetic diversity of the Poyang population and its genetic differentiation from the Anqing population. This study provides fundamental data for formulating a conservation program for YFPs in Poyang Lake.

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