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Genetic variation of mitochondrial cytochrome b of 3 Squaliobarbus curriculus populations in South China
ZHAO Shuang, YUE Xiao-liang, ZHANG Qun
Institute of hydrobiology, Jinan University, Guangzhou 510632, China
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Abstract  

One thousand and twenty nine bp sequence of partial mitochondrial cytochrome b gene of 21 individuals representing 2 populations in the Pearl River(PR) system and 1 population in Han River(HR) in South China was sequenced,and 11 haplotypes and 14 variable sites were detected.Haplotype diversity(h) and nucleotide diversity(π) were much lower in population from HR (h=0.464 and π=0.000 97) than those in populations from Zuojiang and Yujiang in the PR system(h=0.929-1,π=0.023 6-0.036 9).Individuals from different locations in neighbor-joining tree were intertwined showing neither genealogical nor geographic clusters.Pairwise comparison of Fst and AMOVA analysis indicated that there was no significant genetic divergence among 3 populations.As expected from star-like networks,FS tests and Tajima's D tests of whole population were significantly negative,and mismatch distributions were unimodal,indicating a Pleistocene population expansion at about 164 000-66 000Ka BP.

Key wordsSqualiobarbus curriculus      cytochrome b      genetic variation     
Received: 25 December 2009     
:  Q173  
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ZHAO Shuang
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Cite this article:   
ZHAO Shuang,YUE Xiao-liang. Genetic variation of mitochondrial cytochrome b of 3 Squaliobarbus curriculus populations in South China[J]. , 2009, 28(6): 528-531.
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