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KMID : 0381120180400111213
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Genes and Genomics
2018 Volume.40 No. 11 p.1213 ~ p.1223
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Pelagic larval dispersal habits influence the population genetic structure of clam Gomphina aequilatera in China
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Ye Yingying
Fu Zeqin
Tian Yunfang
Li Jiji
Guo Baoying
Lv Zhenming
Wu Changwen
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Abstract
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Pelagic larval dispersal habits influence the population genetic structure of marine mollusk organisms via gene flow. The genetic information of the clam Gomphina aequilatera (short larval stage, 10 days) which is ecologically and economically important in the China coast is unknown. To determine the influence of planktonic larval duration on the genetic structure of G. aequilatera. Mitochondrial markers, cytochrome oxidase subunit i (COI) and 12S ribosomal RNA (12S rRNA), were used to investigate the population structure of wild G. aequilatera specimens from four China Sea coastal locations (Zhoushan, Nanji Island, Zhangpu and Beihai). Partial COI (685 bp) and 12S rRNA (350 bp) sequences were determined. High level and significant FST values were obtained among the different localities, based on either COI (FST?=?0.100?0.444, P??1, indicating extensive gene flow among them. The 12S rRNA showed the same pattern. AMOVA test results for COI and 12S rRNA indicated major genetic variation within the populations: 77.96% within and 22.04% among the populations for COI, 55.73% within and 44.27% among the populations for 12S rRNA. A median-joining network suggested obvious genetic differentiation between the Zhoushan and Beihai populations. This study revealed the extant population genetic structure of G. aequilatera and showed a strong population structure in a species with a short planktonic larval stage.
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KEYWORD
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Genetic population structure, Gomphina aequilatera, COI, 12S rRNA
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