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HERITABILITY OF BODY LENGTH AND WEIGHT FOR THE RIDGETAIL WHITE PRAWN EXOPALAEMON CARINICAUDA
Author(s): 
Pages: 968-972
Year: Issue:  4
Journal: Oceanologia et Limnologia Sinica

Keyword:  Exopalaemon carinicaudabody lengthbody weightheritability;
Abstract: In this study,the heritabilities of body length and weight in the ridgetail white prawn Exopalaemon carinicauda were estimated by intra-group correlation of full-sibs at 30 and 50 days stages after hatching.A total of 82 maturing shrimp were taken from selected population.49 sires and 294 dams were mated in 1♂×6♀,and 49 full-sib families were produced,including 28 half-sib families.30 individuals were randomly sampled in harvest on day 30 and 50 in age from each family and body length and weight were measured.Causal components of phenotypic variance were calculated with the GLM procedure of SPSS software.The results show that the heritability of body length at 30 and 50 days of age were0.14—0.35 and 0.07—0.31,and the heritability of body weight was 0.12—0.23 and 0.14—0.33,respectively.No significant difference was found in the heritability between maternal and paternal genetic variance.However,the difference was significant in components variance of full-sibs within sires and dams.The results prove that the values from components of variance of full-sibs within sires and dams were precise and unbiased for the body length and weight.The study showed that the heritabilities for body length and weight were moderate,and selective breeding would improve greatly early growth of E.carinicauda.
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