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KMID : 0613820070170070882
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Journal of Life Science
2007 Volume.17 No. 7 p.882 ~ p.888
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Genetic Diversity and Population Structure of Pseudobagrus fulvidraco in the Nakdong River
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Lee Bok-Kyu
Huh Man-Kyu
Choi Joo-Soo
Heo Youn-Seong
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Abstract
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Enzyme electrophoresis was used to estimate genetic diversity and population genetic structure of Pseudobagrus fulvidraco in Korea. Nine of the 14 loci (64.3%) showed detectable polymorphism. Genetic diversity at the population and species levels were 0.286 and 0.277, respectively. Analysis of fixation indices, calculated for all polymorphic loci in each population, showed a substantial deficit of heterozygotes relative to Hardy-Weinberg expectations. This deficit is expected that it is due to a limited effective number of individuals per population. The average GST for polymorphic loci was 0.064, indicating that most (93.6%) of the genetic diversity occurred within populations. The indirect estimate of gene flow based on mean GST was 3.67. Given limited gene flow is expected to diverge genetically due to drift and reduced populations. Most populations in our study experience annual, severe demographic bottlenecks due to drought and floods.
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KEYWORD
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Genetic diversity, Population structure, Pseudobagrus fulvidraco
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