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
作者： Chen, Jian 1 ; Luo, Hui 2 ; Zhai, Ziqin 2 ; Wang, Hongchen 2 ; Liu, Baosuo 3 ; Bai, Lirong 2 ; Yu, Dahui 1 ;
作者机构： 1.Guangxi Univ, Coll Anim Sci & Technol, Nanning 530005, Guangxi, Peoples R China
2.Beibu Gulf Univ, Guangxi Key Lab Beibu Gulf Marine Biodivers Conse, Qinzhou 535011, Guangxi, Peoples R China
3.Chinese Acad Fishery Sci, Key Lab South China Sea Fishery Resources Exploit, Minist Agr, South China Sea Fisheries Res Inst, Guangzhou 510300, Guangdong, Peoples R China
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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