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以引进美国夏威夷海洋研究所SPF凡纳滨对虾(Litopenaeus vannamei)群体建立自交系F1和F2,并与海南经过若干代养殖后选育的健康凡纳滨对虾建立杂交系(SPF♀×海南种♂),获得杂交代。通过大规模养殖发现,F1生长最快,杂交代居中,F2最慢。但F1存活率显著低于F2和杂交代。主要是因为F1适应力差,甚至不断有发病个体出现。从虾苗下塘至100日龄,杂交代、F2和F1整个养殖周期存活率分别为60%、54.8%和14.6%,说明杂交代和F2适应力均好于F1。杂交代与F1100日龄生长相近,方差分析表明两者差异并不显著(P>0.05)。在养殖后期杂交代生长和存活率优势明显,不但保持了引进种较好的生长性状,而且表现出海南选育的凡纳滨对虾存活率高的优良性状,杂交优势显著。
The inbred lines F1 and F2 were established in the Litopenaeus vannamei population of the SPF Institute of Marine Science of the United States of America and crossed with healthy Litopenaeus vannamei populations selected for breeding in Hainan Province for several generations ♂), access to hybrid generation. Found by large-scale breeding, F1 fastest growing, hybrids live in, F2 the slowest. However, the F1 survival rate was significantly lower than F2 and hybrid generation. Mainly because F1 poor adaptability, and even continue to have the incidence of individuals. The survival rates of hybrids, F2 and F1 were 60%, 54.8% and 14.6% respectively from Xiaotang to 100-day-old shrimp seedlings, indicating that the adaptability of F2 generation and F2 generation were better than that of F1. Hybrids and F1100 age parity close, ANOVA showed that the difference between the two is not significant (P> 0.05). The growth and survival rate of the hybrids at the later stage of aquaculture had obvious advantages. Not only the better growth traits of introduced species but also the superior traits of high survival rate of L. vannamei breeding in Hainan Province were obtained, and the hybridization advantage was remarkable.