Genetic structure and differentiation of four lake populations of Coilia ectenes (Clupeiformes: Engraulidae) based on mtDNA control region sequences
文献类型: 外文期刊
作者: Cheng, Qiqun 1 ; Zhang, Qingyi 1 ; Ma, Chunyan 1 ; Guan, Weibing 1 ;
作者机构: 1.Chinese Acad Fishery Sci, Key Lab Marine & Estuarine Fisheries Resources &, Minist Agr, E China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China
关键词: Coilia ectenes;Control region;mtDNA;Genetic structure;Phylogeny
期刊名称:BIOCHEMICAL SYSTEMATICS AND ECOLOGY ( 影响因子:1.381; 五年影响因子:1.351 )
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收录情况: SCI
摘要: To investigate genetic structure and differentiation of four lake populations of Coilia ectenes, a total of eighty-one individuals from four largest freshwater lakes (Dongting [DT], Poyang [PY], Chaohu [CH], Taihu [TH]) were analyzed based on mtDNA control region sequences. Seventy-five haplotypes were detected, and four to seven 38 bp tandem repeats were found. The indexes of nucleotide diversity (pi) in these four populations were DT 0.78%, PY 1.09%, CH 0.81%, and TH 0.62%. Genetic distances withinpopulations were between 0.63 and 1.14%, and from 0.76 to 1.60% among populations. A Neighbor–Joining (NJ) tree consisted of three major clades. Clade 1 consisted of 88.89, 26.09, and 4.55% individuals of DT, PY, and CH. Analysis of molecular variance(AMOVA) showed that most variances occurred within populations, suggesting that this is the main source of total variance. Our results suggest that the four lake populations of C. ectenes have not developed significant genetic structure.
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