Heterosis and heritability estimates for the survival of the Pacific white shrimp (Litopenaeus vannamei) under the commercial scale ponds

文献类型： 外文期刊

第一作者： Lu Xia

作者： Lu Xia;Luan Sheng;Cao Baoxiang;Sui Juan;Dai Ping;Meng Xianhong;Luo Kun;Kong Jie;Lu Xia;Luan Sheng;Cao Baoxiang;Sui Juan;Dai Ping;Meng Xianhong;Luo Kun;Kong Jie

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关键词： heterosis; heritability; genetic group; pond survival; Pacific white shrimp; Litopenaeus vannamei

期刊名称：ACTA OCEANOLOGICA SINICA （ 影响因子：1.431； 五年影响因子：1.445 ）

ISSN： 0253-505X

年卷期： 2017 年 36 卷 2 期

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收录情况： SCI

摘要： The aim of the present study is to detect the potential of the base population from diallel crosses of eight introduced strains of the Pacific white shrimp (Litopenaeus vannamei) for improving the yield. Heterosis and heritability were estimated for pond survival at commercial farm conditions for the base population that included 207 full-sib families from a nested mating design by artificial insemination. Among all the hybrids, the heterosis ranged from-11.37% (UA1xUA2) to 20.53% (UA3xSIN) with an average of 0.953%. The results showed that more than half of the hybrids (51.85%) have negative heterosis for survival rate, but most of the hybrids with positive heterosis have high estimates. The high proportion of negative heterosis for survival rate reminders us that the survival trait also should be considered in the crossbreeding program to avoid yield decrease. However, high positive heterosis manifested in most of the hybrids for survival indicates the usefulness of these hybrids for improving the survival to obtain higher yield by crossbreeding in this breeding program. The heritability estimate for pond survival was 0.092 +/- 0.043 when genetic groups were included in the pedigree, and it was significantly different from zero (P < 0.05). The results from this study also indicated that significant improvement for survival is possible through selection in L. vannamei.

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