The loss of genetic diversity during captive breeding of the endangered sculpin, Trachidermus fasciatus, based on ISSR markers: implications for its conservation

文献类型： 外文期刊

第一作者： Bi Xiaoxiao

作者： Bi Xiaoxiao;Yang Qiaoli;Gao Tianxiang;Li Chuangju

作者机构：

关键词： inter-simple sequence repeat (ISSR);Trachidermus fasciatus;conservation;genetic diversity;genetic differentiation

期刊名称：CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY （ 影响因子：1.068； 五年影响因子：0.983 ）

ISSN： 0254-4059

年卷期： 2011 年 29 卷 5 期

页码：

收录情况： SCI

摘要： Inter-simple sequence repeat (ISSR) markers were used to determine the genetic variation and genetic differentiation of cultured and wild populations of Trachidermus fasciatus, an endangered catadromous fish species in China. Six selected primers were used to amplify DNA samples from 85 individuals, and 353 loci were detected. Relatively low genetic diversity was detected in the cultured population (the percentage of polymorphic loci PPL = 73.80%, Nei's gene diversity h = 0.178 2, Shannon information index I = 0.276 9). However, the genetic diversity at the species level was relatively high (PPL = 91.78%; h = 0.258 3, I = 0.398 6). The UPGMA tree grouped together the genotypes almost according to their cultured and wild origin, showing distinct differences in genetic structure between wild and cultured populations. The pairwise F (st) values confirmed significant genetic differentiation between wild and cultured samples. The cultivated population seems to be low in genetic diversity as a result of detrimental genetic effects in the captive population. The results suggest that ISSR markers are effective for rapid assessment of the degree of diversity of a population, thus giving important topical information relevant to preserving endangered species.

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