畜牧兽医学报2018，Vol.49Issue(5)：935-941,7.DOI:10.11843/j.issn.0366-6964.2018.05.008
北京地区中国荷斯坦牛体细胞评分差值变化规律及遗传力估计
Heritability Estimation of SCS Difference and Its Variation in Chinese Holstein Cattle in Beijing
摘要
Abstract
The purpose of this study was to investigate the heritability of somatic cell score (SCS) difference and analyze its changing pattern in Chinese Holstein population in Beijing.Dairy herd improvement (DHI) data of 78 386 Chinese Holstein dairy cows (from 1998 to 2016) obtained from 121 different dairy farms in Beijing were analyzed by the least square method and the SCS difference was calculated using DHI data between the SCSs of the current test-month and the previous test-month.The variance components and heritability of SCS difference were estimated by the linear mixed model and DMU software.The results revealed significant effect (P＜0.01) of herd scale,test year,test season,parity,calving season and current lactation month on SCS difference.The estimated heritability of SCS difference in the current study was (0.054±0.003) for Chinese Holstein cows in Beijing.Among them,the heritability of SCS difference in the first,the second and the third parities were (0.070±0.005),(0.045±0.004),(0.052±0.007),respectively.Since the SCS difference is regarded as a timely simply indicator to detect the occurrence of subclinical mastitis,the estimated heritability of SCS difference might be helpful in the selection practice of resistance to subclinical mastitis in Chinese Holstein cattle.关键词
中国荷斯坦牛/隐性乳房炎/SCC/SCS差值/遗传力估计Key words
Chinese Holstein cattle/subclinical mastitis/SCC/SCS difference/heritability estimation分类
农业科技引用本文复制引用
史良玉,王雅春,俞英,张瑞强,李想,Muhammad Zahoor Khan,刘林,肖炜,唐韶青,张毅..北京地区中国荷斯坦牛体细胞评分差值变化规律及遗传力估计[J].畜牧兽医学报,2018,49(5):935-941,7.基金项目
国家奶牛产业技术体系项目(CARS-36) （CARS-36）
北京市奶牛产业创新团队(BAIC06) （BAIC06）
北京市自然科学基金(6182021) （6182021）
国家自然科学基金(31272420) （31272420）
长江学者与创新团队发展计划(IRT1191) （IRT1191）
