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Abstract：
The aim of this study was to construct an enhanced selection index using the genomic and economic parameters of new health disorders and current production and functional traits. Genomic evaluation for the incidence of clinical mastitis (CM), three claw disease traits, retained placenta (RET), metritis (MET), and cystic ovaries (CYS) was performed using linear animal models based on producer-recorded data. Good correlations among the health disorders were found, and their heritability estimates did not exceed 7%. Economic weights (EWs) for the health disorders were EUR -132.10 for CM, EUR -128.87 for overall claw diseases, EUR -52.10 for RET, EUR -80.48 for MET, and EUR -16.16 for CYS. These EWs indicate changes in the present value of the annual profit per cow when increasing the incidence of the traits by one case per cow year. Selection using the enhanced index resulted in favourable responses for most of the new health disorders (e.g., -0.001 and -0.006 cases of RET and MET per cow year, respectively), and also in the current breeding objective traits (+49 kg of milk, -0.02% of calf losses). An index contribution of 7% for the new health disorders was assessed as acceptable for the breeders.
摘要：
这项研究的目的是使用新的健康疾病的基因组和经济参数以及当前的生产和功能特征来构建增强的选择指数。临床乳腺炎（CM）发病率的基因组评估，三种爪病性状，保留胎盘（RET），子宫炎（MET），根据生产者记录的数据，使用线性动物模型进行囊性卵巢（CYS）。发现了健康障碍之间的良好相关性，他们的遗传力估计不超过7%。健康疾病的经济权重（EW）为CM-132.10欧元，对于整体爪病，EUR-128.87，对于RET，EUR-52.10，MET为80.48欧元，CYS为-16.16欧元。这些EW表明，当性状的发生率每牛每年增加一例时，每头牛的年利润现值发生变化。使用增强指数的选择对大多数新的健康疾病产生了有利的反应(例如，每牛年-0.001和-0.006例RET和MET，分别)，在目前的育种目标性状(+49公斤牛奶，-小腿损失的0.02%)。新的健康疾病的7％的指数贡献被评估为可接受的育种者。
