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首页> 外文会议>Conference of the Association of the Advancement of Animal Breeding and Genetics >BREEDING FOR BODY CONDITION SCORE IN DAIRY COWS
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BREEDING FOR BODY CONDITION SCORE IN DAIRY COWS

机译：奶牛身体状况得分的育种

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摘要

Body condition score has been proposed as an additional trait in New Zealand's national breeding objective. To be considered for inclusion, genetic parameters and an economic value are required. We propose genetic evaluation of body condition score using a random regression model that includes 2nd order orthogonal Legendre polynomials fitted to the genetic variance and a link function to account for heterogeneity of error variance over time, Multivariate analyses have shown that in New Zealand, bodycondition score is not genetically correlated with first lactation milksolids yield traits (when projected to a single common lactation length of 270 days). Moderate genetic correlations with fertility, survival and live weight were estimated. The economic value for body condition score is likely to include feed demands required to replenish lost body condition in a typical New Zealand farm. The relationship between body condition score and fertility will be accounted for in the breeding value for fertility.
机译：人体状况得分已被提出作为新西兰国家育种目标的额外特征。被认为是纳入，需要遗传参数和经济价值。我们提出了使用包含在遗传方差的2ND阶正交的传奇多项式的随机回归模型来提出对体状况评分的遗传评估，并且连杆功能考虑误差方差随时间的异质性，多变量分析显示，在新西兰，主权分数与第一次哺乳期米兰洛米尔屈服性状没有遗传相关（当投射到270天的单一常见哺乳期长度时）。估计与生育，存活和活重的中度遗传相关性。身体状况得分的经济价值可能包括在典型的新西兰农场中补充丢失的身体状况所需的饲料需求。在生育的繁殖价中，将占身体状况得分和生育能力之间的关系。

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