Study on genetic diversity of cultivated populations in 4 species of shrimps

摘要

Genetic diversity of cultivated populations was investigated using assay of vertical slab polyacrylamide gel electrophoresis in 4 species of shrimps,which were Penaeus japonicus,Penaeus monodon.Penaeus vannamei and Metapenaeus ensis.The results showed that the mean number of alleles per locus(A) is 1.3±0.2,1.3±0.1,1.3±0.1 and 1.3±0.1 respectively;the percentage of polymorphic loci(P0.95)is 12.5,6.7,20 and 23.5 respectively;the expected heterozygosity(He)is 0.042±0.034,0.042±0.031,0.028±0.023,0.154±0.082 and 0.150±0.084 respectively.The difference of genetic diversity is obvious in 4 species of shrimps.The degree of genetic diversity is M.ensis>P. vannamei>P.japonicus>P.mondon.In short,the lower level of genetic diversity is estimated in 4 species of shrimps.