Abstract
We evaluated the growth of inbred and hybrid groups of Penaeus monodon from populations of Sanya(S) and Thailand(T).Two inbred groups,SS(S♀×S♂) and TT(T♀×T♂),and two hybrid groups,ST(S♀×T♂) and TS(T♀×S♂) were established.We measured the following traits in the offspring of each group: body length,body weight,carapace length,carapace width,and carapace height.The order of growth performance was STTSTTSS based on the five traits.Prior studies of gene diversity have documented strong differentiation between populations from the western Pacific Ocean and the south China Sea,providing a theoretical basis for heterosis between the Sanya and Thailand populations.Heterosis of the hybrid combination for the five traits ranged from 2.13% to 19.7% and was highest for body weight.The heterosis of the hybrid group ST was higher than that of the hybrid group TS for all traits(P0.05).There was a significant difference in body length,body weight,carapace length,and carapace height of the offspring among the four groups(P0.05),but no difference in carapace width(P0.05).Multiple covariance analysis suggested that length,body weight,and carapace length were significantly different between the hybrid group ST and both inbred groups(P0.05).Our results provide an important reference for hybrid breeding of Penaeus monodon.
Published Version
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