A preliminary genetic distinctness of four Coilia fishes (Clupeiformes: Engraulidae) inferred from mitochondrial DNA sequences |
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Authors: | Cheng Qiqun Cheng Huaping Wang Li Zhong Yang Lu Daru |
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Institution: | Key Laboratory of Marine and Estuarine Fisheries, Ministry of Agriculture, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China. qiquncheng@gmail.com |
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Abstract: | In order to understand the genetic distinctness between four Coilia fishes,i.e., C. ectenes, C. e. taihuensis, C. mystus, and C. grayii, the combined cytochrome b (cytb), 12S rRNA and 16S rRNA gene sequences were obtained and analysed. The results are as follows: 1) neighbour-joining (NJ) and maximum parsimony (MP) trees were built with 1000 bootstrap replicates. They supported that Coilia fishes consisted of two clades: C. grayii form a monophyletic group, and the rest samples form the other monophyletic group; 2) the topological differences between the NJ tree and the MP tree are checked by Templeton test, indicating that their differences are insignificant (P > 0.05); and 3) Kimura-2-parameter distances between the samples of C. ectenes, C. e. taihuensis and C. mystus are all no bigger than 1.6%, and most of them are between 0.0% and 0.9%. C. ectenes, C. e. taihuensis and C. mystus are closely related and that their differences may be under subspecies. |
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