| Genetic diversity and differentiation of mud crab Scylla serrata populations from southeastern China |
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| 作者姓名： | LI Zhongbao LI Shaojing WANG Guizhong |
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| 作者单位： | LI Zhongbao，LI Shaojing，WANG Guizhong
Fisheries College，Jimei University，Xiamen 361021，China
School of Marine and Environmental Studies，Xiamen University，Xiamen 361005，China |
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| 基金项目： | 国家自然科学基金，国家高技术研究发展计划(863计划) |
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| 摘 要： | The genetic diversity and differentiation of 6 mud crab Scylla serrata populations from southeastern China are investigated using allozyme electrophoresis. The mean number of alleles per locus population is 1.3 ± 0.1; the percentage of polymorphic loci per population is 27.3; the observed heterozygosity ranges from (0.195±0.083) to ( 0.241±0.090) and the expected heterozygosity ranges from ( 0.105±0.043 ) to ( 0.131±0.047 ). The coefficient of gene differentiation among populations is low (Fst =0.032), indicating that only 3.2 % of the total genetic diversity comes from inter-population, while the remaining 96.8 % comes from intra-population differences. The genetic distance among populations is 0.000-0.008 (the average is 0.002). Gene flow among the populations is large (Nm = 7.56).Genetic structure is very similar among 6 Scylla serrata populations.
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| 关 键 词： | 遗传变异 异型酶 电泳 等位基因 异型结合性 人口 |
| 收稿时间： | 2003/12/11 0:00:00 |
| 修稿时间： | 2004/1/20 0:00:00 |
Genetic diversity and differentiation of mud crab Scylla serrata populations from southeastern China |
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| LI Zhongbao,LI Shaojing,WANG Guizhong.Genetic diversity and differentiation of mud crab Scylla serrata populations from southeastern China[J].Acta Oceanologica Sinica,2004,23(2):309-316. |
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| Authors: | LI Zhongbao LI Shaojing and WANG Guizhong |
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| Institution: | 1.Fisheries College, Jimei University, Xiamen 361021, China;School of Marine and Environmental Studies, Xiamen University, Xiamen 361005, China2.School of Marine and Environmental Studies, Xiamen University, Xiamen 361005, China |
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| Abstract: | The genetic diversity and differentiation of 6 mud crab Scylla serrata populations from southeastern China are investigated using allozyme electrophoresis. The mean number of alleles per locus population is 1.3 ± 0.1; the percentage of polymorphic loci per population is 27.3; the observed heterozygosity ranges from ( 0.195 ± 0.083)to ( 0.241 ± 0.090) and the expected heterozygosity ranges from ( 0.105 ± 0.043 ) to ( 0.131 ± 0.047 ). The coefficient of gene differentiation among populations is low (Fst =0.032), indicating that only 3.2 % of the total genetic diversity comes from inter-population, while the remaining 96.8 % comes from intra-population differences.The genetic distance among populations is 0.000～0.008 (the average is 0.002). Gene flow among the populations is large (Nm= 7.56).Genetic structure is very similar among 6 Scylla serrata populations. |
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| Keywords: | Scylla serrata allozyme genetic diversity genetic structure genetic differentiation |
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