Low population differentiation revealed in the highly threatened elongate loach (Leptobotia elongata, Bleeker), a species endemic to the fragmented upper reaches of the Yangtze River

文献类型： 外文期刊

第一作者： Liu, Hong-Yan

作者： Liu, Hong-Yan;Xiong, Fei;Duan, Xin-Bin;Tian, Hui-Wu;Liu, Shao-Ping;Chen, Da-Qing

作者机构：

关键词： Leptobotia elongate; Microsatellite; Genetic structure; The upper reaches of the Yangtze River

期刊名称：BIOCHEMICAL SYSTEMATICS AND ECOLOGY （ 影响因子：1.381； 五年影响因子：1.351 ）

ISSN： 0305-1978

年卷期： 2017 年 70 卷

页码：

收录情况： SCI

摘要： The elongate loach (Leptobotia elongata) is a typical migratory fish that was formerly found in abundance throughout the upper and middle reaches of the Yangtze River but is now classified as a highly threatened fish on the China Species Red List. Here, a comparative study of microsatellite loci was performed to evaluate the genetic diversity and analyze the population structure in seven locations in the upper reaches of the Yangtze River, China. The results showed that genetic diversity of L elongata is generally still at a high level. Populations from Xinshi, Panzhihua, Hechuan and Chishui, were found to have lower levels of genetic diversity than those that lived in Leshan, Yibin and Jiangjin. The IAM model indicated that populations from Panzhihua, Xinshi and Hechuan have undergone recent bottlenecks. AMOVA analysis revealed a small amount of differentiation among populations (3.6%), but most of the total variation occurred within populations (96.4%). Pair wise comparisons of populations confirmed a low population differentiation. STRUCTURE analysis showed no obvious genetic structure among populations, indicating that L. elongate living in the main stem of the river and its tributaries should be considered a single management unit. (C) 2016 Published by Elsevier Ltd.

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