Genetic parameters for hoof disorders and feet and leg conformation traits in Finnish Holstein cows
Genetic parameters for hoof disorders and feet and leg conformation traits in Finnish Holstein cows
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DOI：
10.3168/jds.2012-6334
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发表时间：
2013-05-01
影响因子：
3.5
通讯作者：
Juga, J.
中科院分区：
文献类型：
--
作者：
Haggman, J.;Juga, J.
蹄病是奶牛养殖业的一个主要福利问题，给养殖场造成了相当大的成本。在这项研究中，使用2003年至2010年期间来自1337个畜群的24,685头荷斯坦奶牛的数据，使用芬兰荷斯坦奶牛蹄病的二项混合模型来评估蹄病与足和腿构象特征之间的相关性。马蹄疾患与足、腿构象性状之间的遗传力和相关性也进行了估计。单变量logistic模型对8种足部疾病的遗传率估计从0.02（足底出血、慢性足板炎和足跟角糜烂）到0.13（指性皮炎）不等。使用多元线性模型的责任量表对5种最常见的蹄病进行遗传力估计，范围从0.02（足底出血）到0.11（螺旋形蹄）。从多元线性模型中估计的足部和腿部构象性状的遗传率从0.10（后腿后视图）到0.19（后腿侧面视图）不等。蹄类疾病的遗传相关性在-0.36 ~ 0.57之间，足类和腿部构象性状的遗传相关性在-0.30 ~ 0.83之间。蹄病与足、腿构象性状的遗传相关在-0.51 ~ 0.45之间。各种蹄类疾病与足、腿构象性状的遗传相关性大多较低，多数与零差异不显著。这表明，在芬兰荷斯坦品种中，用足部和腿部形态性状作为指示性状来间接选择更好的蹄健康是无效的。
Hoof disorders are a major welfare problem in dairy farming and result in considerable costs to the farms. In this study, the data from 24,685 Holstein cows from 1,337 herds between 2003 and 2010 were used to evaluate the correlation between hoof disorders and feet and leg conformation traits using a binomial mixed model for hoof disorders in Finnish Holstein cows. Heritabilities and correlations among the hoof disorders and feet and leg conformation traits were also estimated. Heritability estimates from univariate logistic models for 8 hoof disorders ranged from 0.02 (sole hemorrhage, chronic laminitis, and heel horn erosion) to 0.13 (digital dermatitis). Heritability estimates using the liability scale from the multivariate linear model for the 5 most-common hoof disorders ranged from 0.02 (sole hemorrhage) to 0.11 (corkscrew hoof). Estimates of heritability for feet and leg conformation traits from the multivariate linear model ranged from 0.10 (rear leg rear view) to 0.19 (rear leg side view). Genetic correlations among hoof disorders ranged from -0.36 to 0.57, and genetic correlations among feet and leg conformation traits ranged from -0.30 to 0.83. The genetic correlations between hoof disorders and feet and leg conformation traits ranged from -0.51 to 0.45. Most of the genetic correlations between various hoof disorders and feet and leg conformaStion traits were low and most were nonsignificantly different from zero. This indicates that indirect selection for better hoof health using feet and leg conformation traits as indicator traits is not efficient in the Finnish Holstein breed.