Genetic parameters for somatic cell score and production traits in the first three lactations of Chinese Holstein cows

被引：8
|
作者：
Zhao Fu-ping [1 ]
Guo Gang [1 ,2 ,3 ]
Wang Ya-chun [3 ]
Guo Xiang-yu [3 ]
Zhang Yuan [3 ]
Du Li-xin [1 ]
机构：
[1] Chinese Acad Agr Sci, Inst Anim Sci, Natl Ctr Mol Genet & Breeding Anim, Beijing 100193, Peoples R China
[2] Beijing Sanyuan Dairy Cattle Breeding Ctr, Beijing 100076, Peoples R China
[3] China Agr Univ, Coll Anim Sci & Technol, Beijing 100193, Peoples R China
来源：
JOURNAL OF INTEGRATIVE AGRICULTURE | 2015年 / 14卷 / 01期
基金：
中国国家自然科学基金;
关键词：
somatic cell score; genetic parameters; Chinese Holstein; single-parity multi-trait animal model; multi-trait repeatability animal model; CLINICAL MASTITIS; RANDOM REGRESSION; DAIRY-CATTLE; COUNT; RESISTANCE; SELECTION; MODEL;
D O I：
10.1016/S2095-3119(14)60758-9
中图分类号：
S [农业科学];
学科分类号：
09 ;
摘要：
The objectives of this study were to estimate genetic parameters of lactation average somatic cell scores (LSCS) and examine genetic associations between LSCS and production traits in the first three lactations of Chinese Holstein cows using single-parity multi-trait animal model and multi-trait repeatability animal model. There were totally 273 605 lactation records of Chinese Holstein cows with first calving from 2001 to 2012. Heritability estimates for LSCS ranged from 0.144 to 0.187. Genetic correlations between LSCS and 305 days milk, protein percentage and fat percentage were -0.079, -0.082 and -0.135, respectively. Phenotypic correlation between LSCS and 305 days milk yield was negative (-0.103 to -0.190). Genetic correlation between 305 days milk and fat percentage or protein percentage was highly negative. Genetic correlation between milk fat percentage and milk protein percentage was highly favorable. Heritabilities of production traits decreased with increase of parity, whereas heritability of LSCS increased with increase of parity.
引用
收藏
页码：125 / 130
页数：6
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