水产学报2017，Vol.41Issue(10)：1521-1532,12.DOI:10.11964/jfc.20160510409
乌鳢群体遗传多样性和遗传结构分析
Genetic diversity and structure analysis based on the mitochondrial DNA control region of the northern snakehead (Channa argus)
摘要
Abstract
The northern snakehead (Channa argus) is extensively distributed throughout rivers and lakes of China. With overexploitation and water eco-environment deterioration, the resources ofC. argus are severely affected. To examine genetic structure and the demographic history of the northern snakehead, we collected 212 specimens from 8 locations for generating mitochondrial DNA complete control region sequences. Result showed that the length of control region is about 907 bp. The genetic diversity in southern China is higher than that in the north with boundary line 34°N. The factors that warm and wet climate in the south China and dry and cold climate in the north China, and that the rapid uplift of Qinling Mountain aggravated differentiation of the east Asian monsoon, may have an important influence on genetic diversity. The phylogenetic tree showed a shallow genealogy and high genetic differentiation and significant level of genetic structure which behaved in different drainages. This indicated that geographical barriers led to recent genetic differentiation. The demographic history of 7 populations of China displayed that the northern snakehead experienced population rapid growth in the interglacial period of the middle Quaternary. Then, the demography declined during the last glacial period. With climatic warming in the Holocene, a slight population growth happened. The Dongting Lake population also experienced a population expansion in the interglacial period of the middle Quaternary. The glacial-interglacial cycles in the Quaternary, especially from the middle Quaternary, caused pronounced climatic fluctuations and had an important influence on the northern snakehead populations. Information on genetic diversity and genetic structure will have implications for the management of fisheries and conservation efforts.关键词
乌鳢/mtDNA控制区/遗传多样性/遗传结构/群体历史动态Key words
Channa argus/mtDNA control region/genetic diversity/genetic structure/population demography分类
生物科学引用本文复制引用
周伟,高天翔,王俊,宋娜..乌鳢群体遗传多样性和遗传结构分析[J].水产学报,2017,41(10):1521-1532,12.基金项目
公益性行业(农业)科研专项(201303050)Special Fund for Agro-scientific Research in the Public Interest (201303050) （农业）
