荷斯坦牛首次产犊日龄与305d产奶量遗传参数的评估

发布时间：2018-03-16 00:02

本文选题：荷斯坦牛　切入点：首次产犊日龄　出处：《家畜生态学报》2017年05期 　论文类型：期刊论文

【摘要】：本研究以新疆呼图壁种牛场4647头中国荷斯坦牛群体1982~2010年共28年配种记录、生产性能记录和产犊记录为研究材料,以首次产犊日龄与头胎305d产奶量为研究对象,利用SAS 8.1软件、MTDFREML 2000f软件对数据进行处理,进行非遗传因素分析,构建单性状动物模型、应用非求导约束极大似然法(DFREML)估计性状的方差组分,估算出首次产犊日龄与头胎305d产奶量的遗传参数。结果表明:首次产犊日龄与头胎305d产奶量的遗传力分别为0.07和0.19。首次产犊日龄与头胎305d产奶量之间的遗传相关和表型相关分别为-0.12、-0.105。本研究对新疆地区荷斯坦牛首次产犊日龄与头胎305d产奶量做了系统的分析,探讨了首次产犊日龄与产奶量之间的遗传关系,也为优化育种方案和遗传评定提供了理论依据。
[Abstract]:In this study, 4 647 Chinese Holstein cattle breeding records, production performance records and calving records were recorded from 1982 to 2010 in Hutubi cattle farm, Xinjiang, and the age of first calving and the milk yield of first embryo 305 days were used as the research objects. The data were processed by SAS 8.1 software MTDFREML2000f, and non-genetic factor analysis was carried out. A single trait animal model was constructed, and the variance components of traits were estimated by using non-derivation constraint maximum likelihood method. The genetic parameters of the first calving age and the first 305d milk yield were estimated. The results showed that the heritability of the first calving age and the first calf 305d milk yield were 0.07 and 0.19 respectively. The genetic correlation between the first calving age and the first 305d milk yield was found. The correlation with phenotype was -0.12- 0.105.The first calving age of Holstein cattle and milk yield of the first 305d were systematically analyzed in this study. The genetic relationship between the first calving age and milk yield was discussed, and the theoretical basis was provided for the optimization of breeding scheme and genetic evaluation.
【作者单位】：伊犁师范学院;新疆农业大学动物科学学院;
【基金】：伊犁师范学院教育教学改革项目资助(JGYB201528)
【分类号】：S823

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