Estimates of additive and non-additive genetic effects on growth traits in a diallel cross of three strains of pearl oyster (Pinctada fucata)

文献类型： 外文期刊

第一作者： Chen, Jian

作者： Chen, Jian;Yu, Dahui;Chen, Jian;Luo, Hui;Zhai, Ziqin;Wang, Hongchen;Bai, Lirong;Yu, Dahui;Liu, Baosuo

作者机构：

关键词： Pinctada fucata; Diallel cross; Additive genetic; Heterosis; Reciprocal effect

期刊名称：AQUACULTURE INTERNATIONAL （ 影响因子：1.363； 五年影响因子：1.75 ）

ISSN： 0967-6120

年卷期： 2021 年 29 卷 3 期

页码：

收录情况： SCI

摘要： Several strains of pearl oysters (Pinctada fucata) are distributed in the coastal areas of South China. To explore strategies for genetic improvement, additive genetic, heterotic, and strain reciprocal effects on growth traits were estimated by performing a full 3 x 3 diallel cross of three pearl oyster strains that are local to Beihai, Guangxi Province; Xuwen, Guangdong Province; and Sanya, Hainan Province. The simultaneous production of progeny for all crosses was achieved using mass spawning in Lingshui, Hainan Province. For body weight, the Beihai strain showed the highest additive genetic effect (+ 5.7%) and the Sanya strain showed the lowest (- 4.3%), with similar additive genetic effect patterns for shell length, shell height, and shell width. The averaged heterotic outcomes were significant (P < 0.01) for all growth traits, varying from + 6.1% for shell length to + 19.1% for body weight. Reciprocal cross effects were determined for growth traits, with a relatively high correlation for all traits between strain additive performance and total performance (r(2) = 0.72 to 0.85). These findings reveal the potential to exploit strain additive variation to improve P. fucata culture stock using direct selection methods for increased productivity of pearl oyster cultivation in China.

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