Low genetic differentiation among widely separated populations of the pearl oyster Pinctada fucata as revealed by AFLP
文献类型: 外文期刊
第一作者: Yu, DH
作者: Yu, DH;Chu, KH
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关键词: AFLP;biogeography;genetic diversity;pinctada fucata;population genetics
期刊名称:JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY ( 影响因子:2.171; 五年影响因子:2.749 )
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收录情况: SCI
摘要: Genetic variation within and among five populations of the pearl oyster Pinctada fucata, from China (Daya Bay, Sanya Bay and Beibu Bay), Japan (Mie Prefecture) and Australia (Port Stephens) was studied using AFLP. Three primer pairs generated 184 loci among which 91.8-97.3% is polymorphic. An overall genetic diversity of 0.38 among populations and an average of 0.37 within populations (ranging from 0.35 in Japanese population to 0.39 in Beibu Bay population) were observed. Genetic differentiation among the five populations is low but significant as indicated by pairwise G_(ST) (0.0079-0.0404). AMOVA further shows that differentiation is significant among the five populations but is not significant at a broader geographical scale, among the three groups of Chinese, Japanese and Australian populations or among the two groups of Australian and north Pacific populations. The low level of genetic differentiation indicated that P. fucata populations in the west Pacific are genetically linked. Among the five populations, the Australian one is more differentiated from the others, based on both pairwise AMOVA and G_(ST) analyses, and is genetically isolated by distance as indicated by Mantel test. However, genetic differences among the three Chinese populations are not correlated with the geographic distances, suggesting that Hainan Island and Leizhou Peninsula may act as barriers blocking gene flow.
分类号: Q
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