Response to four generations of selection for growth performance traits in mandarin fish (Siniperca chuatsi)
文献类型： 外文期刊
作者： Sun, Chengfei 1 ; Dong, Junjian 1 ; Li, Wuhui 1 ; Tian, Yuanyuan 1 ; Hu, Jie 1 ; Ye, Xing 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Key Lab Trop & Subtrop Fishery Resource Applicat, Minist Agr & Rural Affairs, Pearl River Fisheries Res Inst, Guangzhou 510380, Peoples R China
关键词： Siniperca chuatsi; Genetic parameters; Selection response; Realized heritability; Coefficient of variation
期刊名称：AQUACULTURE （ 影响因子：5.135； 五年影响因子：5.125 ）
ISSN： 0044-8486
年卷期： 2022 年 548 卷
页码：
收录情况： SCI
摘要： Selective breeding refers to the selection of individuals or populations with superior genetic traits from a population or family, for the purpose of directionally screening and enriching the dominant traits of the target species, to acquire breeds with directional dominant traits. The mandarin fish (Siniperca chuatsi) is an important high-quality freshwater fish widely cultured in China. The selective breeding of this species to obtain desirable growth performance traits has garnered considerable attention by researchers. We constructed a basic breeding population by selecting high growth as the target trait. Subsequently, we conducted family selection through four successive generations. We used the growth data (initial and harvest body weights) of the four generations of mandarin fish to estimate the realized heritability, selection response, and genetic gain, on the body weight of mandarin fish. We obtained the following values from generations F1-F4: realized heritability 0.17-0.47, selection response 0.40-1.12, and genetic gain 6.94-17.25%. The average genetic gain was 12.14%. Moreover, after four generations of breeding, the average growth rate of the selective breeding population had increased by 16.3% compared with that of the control group. This indicated that selective breeding had resulted in good genetic progress regarding the growth traits of mandarin fish and desirable selection effects. The coefficient of variation for the harvest body weight of generations F1-F4 decreased with increasing generation number (18.68-10.10%). This shows that the degree of variation in body weight among families decreased over generations, tending towards genetic stability after selective breeding. Our results provide a scientific basis and technical support for mandarin fish breeding and may serve as a reference for breeding other aquaculture species.
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