运用重复力模型估计天目多胎羊繁殖性状的遗传参数  

Genetic Parameters of Reproductive Traits in Tianmu Multiparous Sheep Estimated by Repeatability Model

作　　者：张文静 李雪 洪巍 何军敏 杨存明 龙丽 刘桂芬[1] 张果平[1] 魏晨 田可川 黄锡霞[2] Zhang Wenjing;Li Xue;Hong Wei;He Junmin;Yang Cunming;Long Li;Liu Guifen;Zhang Guoping;Wei Chen;Tian Kechuan;Huang Xixia(Institute of Animal Science and Veterinary Medicine,Shandong Academy of Agricultural Sciences,Jinan 250100,China;College of Animal Science,Xinjiang Agricultural University,Urumqi 830052,China;Zhejiang Sino Ecological Agriculture Co.,Ltd.,Hangzhou 311300,China)

机构地区：[1]山东省农业科学院畜牧兽医研究所,山东济南250100 [2]新疆农业大学动物科学学院,新疆乌鲁木齐830052 [3]浙江赛诺生态农业有限公司,浙江杭州311300

出　　处：《山东农业科学》2024年第9期104-108,共5页Shandong Agricultural Sciences

基　　金：山东省农业科学院农业科技创新工程项目(CXGC2023F10,CXGC2023A33)。

摘　　要：本研究旨在通过探究绵羊新品种——天目多胎羊胎产羔数与胎平均初生重、胎产羔重、胎产活羔数的遗传关系,进一步了解其繁殖性能,为新品种培育提供理论依据。以浙江赛诺生态农业有限公司养殖的天目多胎羊为研究对象,收集胎产羔数、胎平均初生重、胎产羔重、胎产活羔数繁殖性状数据各5543条,运用SAS 9.2软件GLM程序对影响天目多胎羊繁殖性状的固定效应进行分析;运用DMU软件中AI-REML算法结合单/多性状重复力模型对4个繁殖性状进行遗传参数估计。结果表明,胎产羔数、胎平均初生重、胎产羔重和胎产活羔数的遗传力分别为0.007、0.014、0.006、0.012,均表现为低遗传力;繁殖性状间的遗传相关系数范围为-0.962~0.745,其中胎产羔数和胎产活羔数与胎平均初生重均呈较强负相关(-0.962和-0.605),其余性状间均呈现正相关。可见,上述天目多胎羊繁殖性状均为低遗传力性状,提高产羔数引起的低初生重可通过饲养管理进行弥补,这有益于新品种的选育。The purpose of this study was to explore the genetic relationship between litter size at birth and litter mean weight per lamb born,total litter weight at birth and litter survival lamb number in Tianmu multiparous sheep,so as to further understand their reproductive performance and provide a theoretical basis for the cultivation of new breed.In this study,Tianmu multiparousl sheep from Zhejiang Sino Ecological Agri-culture Co.,Ltd.were used as subject,5543 pieces of data on reproductive traits including litter size at birth,litter mean weight per lamb born,total litter weight at birth and litter survival lamb number were collected.The fixed effect on the reproductive traits of Tianmu multiparous sheep was analyzed using GLM program in SAS 9.2 software.The AI-REML algorithm in DMU software combined with the single/multiple trait repeat-ability model was used to estimate the genetic parameters of the four reproductive traits.The results showed that the heritability of litter size at birth,litter mean weight per lamb born,total litter weight at birth and litter survival lamb number were 0.007,0.014,0.006 and 0.012,respectively,showing low heritability.The genet-ic correlation between the reproductive traits ranged from-0.962 to 0.745,among which,litter size at birth and litter survival lamb number were highly negatively correlated with litter mean weight per lamb born(-0.962 and-0.605),and the other traits were positively correlated with each other.It could be seen that the above reproductive traits of Tianmu multiparous sheep were all low heritability traits,and the low birth weight caused by increasing the number of lambs could be compensated by feeding management,which would be ben-eficial for breeding of new breeds.

关 键 词：天目多胎羊 重复力模型 繁殖性状 遗传力 遗传相关 

分 类 号：S826[农业科学—畜牧学]