大刺鳅18月龄体质量的育种值和遗传力估计  

Estimated breeding value and heritability of 18 pfm body weight for full-sib families of Mastacembelus armatus

作　　者：刘艳艳[1] 薛凌展[1] 傅建军[2] 吴妹英[1] 陈宇舒 廖梦香 陈度煌[1] 胡振禧[1] 林学文[1] 董在杰[2] 樊海平[1] 吴斌[1] LIU Yanyan;XUE Lingzhan;FU Jianjun;WU Meiying;CHEN Yushu;LIAO Mengxiang;CHEN Duhuang;HU Zhenxi;LIN Xuewen;DONG Zaijie;FAN Haiping;WU Bin(Freshwater Fisheries Research Institute of Fujian,Fuzhou 350002,China;Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization,Ministry of Agriculture and Rural Affairs,Freshwater Fisheries Research Center of Chinese Academy of Fishery Sciences,Wuxi 214081,China)

机构地区：[1]福建省淡水水产研究所,福建福州350002 [2]中国水产科学研究院淡水渔业研究中心,农业农村部淡水渔业与种质资源利用重点实验室,江苏无锡214081

出　　处：《渔业研究》2022年第3期213-222,共10页Journal of Fisheries Research

基　　金：福建省海洋与渔业结构调整专项资金(2020MDS-YT005);福建省省属公益类科研院所基本科研专项(2020R1014002);福建省海洋服务与渔业高质量发展专项资金(FJHY-YYKJ-2022-2-1).

摘　　要：随着人工养殖大刺鳅产业的逐渐兴起,苗种种质混乱和遗传背景不清晰等问题日益突出,不利于该品种的商业化开发。为探究大刺鳅的选育潜力,本研究以野生大刺鳅为亲本,通过全同胞育种模式构建了17个全同胞家系。经过18个月龄的养殖,最终获得7个有效家系,并采用单性状动物模型,以各家系亲本的体质量为协变量,估算了18月龄体质量的遗传力和个体BLUP育种值。通过18月龄大刺鳅全同胞家系体质量的方差组分评估结果显示,遗传力达到了(0.4681±0.1737),t检验P<0.01。此外,体质量与其育种值之间呈正相关线性关系,雄鱼回归方程为y=0.3936x-84.1930(R^(2)=0.7554,P<0.01);雌鱼回归方程为y=0.517x-64.126(R^(2)=0.8178,P<0.01)。个体育种值前50的雌性个体主要集中在3个家系中(B、E和D),尤其是家系B,雌性育种值前24和雄性育种值前19均来源于该家系。其中,雄鱼最大育种值为75.09,雌鱼最大育种值为67.49,均来自于家系B。本研究显示大刺鳅体质量具有较高的遗传力,可以通过表型或BLUP育种值的方式进行选育。With the gradual rise of aquaculture of Mastacemblus armatus,the problems such as germ plasm confusion and unclear genetic background have become increasingly prominent,which are not conducive to the commercial development of variety.In order to explore the breeding potential of M.armatus,this study used wild M.armatus as parents to construct 17 full-sib families through full-sib breeding model.After 18 months of cultivation,seven effective families were finally obtained.The single trait animal model was used to estimate the breeding value and heritability of each individual by BLUP,with the average body weight of each family as a covariate.The variance component evaluation results of the full-sib family weight of 18 pfm M.armatus showed that the heritability was(0.4681±0.1737),the t test reached P<0.01,and the body weight had a positive correlation with breeding value.The regression equation of male was y=0.3936x-84.1930(R^(2)=0.7554,P<0.01);the female was y=0.517x-64.126(R^(2)=0.8178,P<0.01).The females with the top 50 breeding values were mainly concentrated in family B,E and D,especially family B,the top 24 females and top 19 males were from this family.The maximum breeding value of male fish was 75.09,and that of female fish was 67.49,both of them were from the same family B.Through this study,the M.armatus had high heritability of body weight,which could be selected by phenotype or BLUP breeding value.

关 键 词：大刺鳅 全同胞家系 遗传力 育种值 

分 类 号：Q953[生物学—动物学]