中国水产科学2011，Vol.18Issue(1)：75-82,8.DOI:10.3724/SP.J.1118.2011.00075
不同温度下哲罗鲑幼鱼生长性状的遗传参数估计
Genetic parameters of growth traits in Hucho taimen at different temperature
摘要
Abstract
Nine half-dam families and 34 full-sib families were established by nest design using one female parent mated to four male parents. Nineteen of 34 full-sib families were raised under (13±1.5)℃ while others were raised under (9±1.5)℃. Phenotypic variance components under different period were calculated with the GLM procedure of SPSS software. The estimated narrow-sense heritabilities were 0.413-0.675 for body weight and 0.297-0.777 for body length under low temperature, while those were 0.396-0.558 and 0.194-0.624 for body weight and body length respectively under high temperature. All of them were relatively high. Variance components between female parents were larger than those between male parents for each growth trait, indicating that large maternal effect or other non-additive genetic effects exist, and heritability estimation of variance components between male parents were relatively unbiased. The estimates of narrow-sense heritability under low temperature were larger than that under high temperature, suggesting that G×E interaction existed and phenotypic selection under low temperature could result in better effect. Genetic and phenotypic correlation of body weight and body length was extremely significant under different temperature and in different growth periods (P＜0.01). The estimates of genetic correlation were 0.794-0.939 and those of phenotypic correlation were 0.815-0.939. Relatively high heritability estimates and positive genetic correlation indicate that growth traits of Hucho taimen could be improved favorably through selection either on body weight or on body length.[Journal of Fishery Sciences of China, 2011,18(1): 75-82]关键词
哲罗鲑/生长性状/遗传力/遗传相关分类
农业科技引用本文复制引用
王俊,匡友谊,佟广香,尹家胜..不同温度下哲罗鲑幼鱼生长性状的遗传参数估计[J].中国水产科学,2011,18(1):75-82,8.基金项目
农业部公益性行业科研专项(201003055) （201003055）
中央级公益性科研院所基本科研业务费专项(2008HSYZX-SJ-08). （2008HSYZX-SJ-08）
