引用本文:	马爱军,王新安,黄智慧,杨志,曲江波,李猛,郭建丽.大菱鲆(Scophthalmus maximus)家系选育 F₂ 早期选择反应和现实遗传力估计.海洋与湖沼,2012,43(1):57-61.

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*大菱鲆(Scophthalmus maximus)家系选育 F₂ 早期选择反应和现实遗传力估计*
马爱军,王新安,黄智慧,杨志,曲江波,李猛,郭建丽
1.中国水产科学研究院黄海水产研究所青岛市海水鱼类种子工程与生物技术重点实验室农业部海洋渔业资源可持续利用重点开放实验室;2.烟台市开发区天源水产有限公司

摘要:

为了评估大菱鲆选育 F₂ 的早期育种效果, 采用 3 种方法, 即, Ⅰ: 比较 F₂ 选择系和对照系的最小二乘均值, Ⅱ: 比较连续2代(F₁ 和F₂)选择系目标性状间的育种值, Ⅲ: 比较F₂ 选择系和对照系的育种值, 估测了 6 月龄大菱鲆体重的选择反应, 并进而分析了现实遗传力和遗传增益。结果表明, 3种方法的选择反应估测值存在一定差异, 其相应估测的现实遗传力和遗传增益也不相同; 3 种方法估测选择反应、现实遗传力和遗传获得的均值分别为 3.1983±0.5880、0.2941±0.0531 和 8.70±1.60, 显示出足够大的早期选择反应、中等的现实遗传力和较低的遗传获得, 预示利用家系选育对大菱鲆进行遗传改良能够取得良好的育种成效, 同时, 这些群体还有很大的遗传改良潜力。

关键词: 大菱鲆, 选择育种, 选择反应, 现实遗传力

DOI：10.11693/hyhz201201009009

分类号:

基金项目:现代农业产业技术体系建设专项资金资助, CARS-50-G01号

附件

RESPONSE TO SELECTION AND REALIZED HERITABILITY FOR EARLY GROWTH IN THE SECOND-GENERATION BREEDED LINE OF TURBOT (SCOPHTHALMUS MAXIMUS L.)

MA Ai-Jun^1,2,3, WANG Xin-An^1,2,3, HUANG Zhi-Hui^1,2,3, YANG Zhi⁴, QU Jiang-Bo⁴, LI Meng^1,2,3, GUO Jian-Li^1,2,3

1.Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences;2.Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture;3.Qingdao Key Laboratory for Marine Fish Breeding and Biotechnology;4.Yantai Tianyuan Aquatic Limited Corporation

Abstract:

The second-generation selected line of turbot was constructed by a consecutive selection for faster growth in the base population. Response to selection for 6 months live weight of turbot (Scophthalmus maximus L.) were estimated by three methods:Ⅰ. Comparing the least squares means of the second-generation selected line and control line,Ⅱ. Comparing the estimated breeding values for live weight between the first- and the second-generation selected line, and Ⅲ. Comparing the estimated breeding values of the second-generation selected line and control line, respectively. Based on selection response values evaluated, realized heritability and genetic gain were also estimated. The results showed that response to selection, realized heritability and genetic gain estimated by three methods were different and their mean values were 3.1983±0.5880, 0.2941±0.0531 and 8.70±1.60, respectively, which revealed that large enough early selection response, moderate realized heritability and lower genetic gain were obtained. It was concluded that the family selection was an effective approach to improving growth traits of turbot, at the same time, the population still has additive genetic variance to enable further improvement.

Key words: Scophthalmus maximus, Selective breeding, Selection response, Realized heritability