生物
遗传力
选择(遗传算法)
特质
选择性育种
遗传增益
人口
普通话
育种计划
遗传变异
遗传相关
定向选择
动物科学
遗传学
农学
人口学
基因
语言学
计算机科学
哲学
社会学
人工智能
栽培
程序设计语言
作者
Chengfei Sun,Jing Dong,Wuhui Li,Ye Tian,Jie Hu,Yongna Xing
出处
期刊:Aquaculture
[Elsevier]
日期:2022-02-01
卷期号:548: 737590-737590
被引量:7
标识
DOI:10.1016/j.aquaculture.2021.737590
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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