简短通讯：初产挪威红牛不返情率和乳腺炎的遗传分析

Short communication: Genetic analysis of nonreturn rate and mastitis in first-lactation Norwegian Red cows.

作者信息

Heringstad B, Andersen-Ranberg I M, Chang Y M, Gianola D

机构信息

Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, N-1432 As, Norway.

出版信息

J Dairy Sci. 2006 Nov;89(11):4420-3. doi: 10.3168/jds.S0022-0302(06)72489-4.

DOI:10.3168/jds.S0022-0302(06)72489-4

PMID:17033030

Abstract

Associations between clinical mastitis (CM) and nonreturn rate within 56 d after first insemination (NR56) were examined in Norwegian Red (NRF) cows. Records on absence or presence of CM within each of the intervals, -30 to 30, 31 to 150, and 151 to 300 d after first calving, and records on NR56 for 620,492 first-lactation daughters of 3,064 NRF sires were analyzed with a Bayesian multivariate threshold liability model. Point estimates of genetic correlations between NR56 and the 3 CM traits were between -0.05 and -0.02. Residual correlations were close to zero, and correlations between herd-5-yr effects on NR56 and CM in the 3 lactation intervals ranged from -0.15 to -0.17. It appears that CM and NR56 in first lactation are independent traits.

摘要

在挪威红牛（NRF）母牛中，研究了临床型乳房炎（CM）与首次输精后56天内的返情率（NR56）之间的关联。分析了3064头NRF公牛的620492头头胎女儿在首次产犊后-30至30天、31至150天以及151至300天各时间段内CM的有无记录，以及NR56的记录，采用贝叶斯多变量阈值易感性模型进行分析。NR56与3个CM性状之间的遗传相关点估计值在-0.05至-0.02之间。残差相关性接近零，且在3个泌乳期内，牛群5年效应与NR56和CM之间的相关性在-0.15至-0.17之间。看来头胎中的CM和NR56是独立性状。