Genetic diversity and reproductive success of a wild population of Chinese sturgeon(Acipenser sinensis)from the Yangtze River inferred from juveniles born in 2014

作     者：Zhong-Yuan Shen Dan Yu Xin Gao Fu-Tie Zhang Huan-Zhang Liu Zhong-Yuan Shen;Dan Yu;Xin Gao;Fu-Tie Zhang;Huan-Zhang Liu

作者机构：The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of SciencesInstitute of HydrobiologyChinese Academy of SciencesWuhanHubei 430072China University of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Zoological Research》 (动物学研究（英文）)

年 卷 期：2020年第41卷第4期

页      面：423-430页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 0905[农学-畜牧学] 0906[农学-兽医学] 071007[理学-遗传学] 0833[工学-城乡规划学] 0713[理学-生态学] 0834[工学-风景园林学（可授工学、农学学位）] 

基　　金：This study was funded by the National Key R&D Program of China(2018YFD0900801) Strategic Priority Research Program of Chinese Academy of Sciences(XDB31040000) Follow-Up Work of the Three Gorges Project(2136902) and Sino BON-Inland Water Fish Diversity Observation Network。 

主　　题：instead absence Yangtze 

摘      要：The Chinese sturgeon(Acipenser sinensis Gray,1835)is a large anadromous fish species,which is under considerable threat due to dramatic declines in population numbers.In the current study,population genetic diversity and individual reproductive success were assessed using nuclear microsatellite markers(simple sequence repeat,SSR)and complete mitochondrial(mt DNA)genome analysis of juveniles born in 2014.Results showed the existence of size polymorphism in the mt DNA genome of Chinese sturgeon,which was caused by a repeat motif.Population genetic diversity was high based on both SSR(Ho:0.728±0.211;He:0.779±0.122)and mt DNA genome analyses(H:0.876±0.0035;Pi:0.0011±0.0010).A positive inbreeding coefficient(FIS:0.066±0.143)was also found,indicating the occurrence of inbreeding.Reconstruction of sibling groups identified 11 mothers and 11 fathers involved in reproduction of Chinese sturgeons in 2014.Variance in individual reproductive success was not significant,with reproductive success of parent fish instead shown to be relatively even(P=0.9970.05),thus suggesting the absence of sweepstakes reproductive success(SRS).These results indicate that,in regard to conservation,loss of genetic diversity due to the effects of SRS is not of particular concern.However,we must focus on having an adequate number of adults and suitable environmental conditions to ensure that fish can reproduce.