Symposium review: Multiple-trait single-step genomic evaluation for hoof health.
Symposium review: Multiple-trait single-step genomic evaluation for hoof health.
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研讨会回顾：蹄健康的多性状单步基因组评估。
DOI：
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发表时间：
2020
影响因子：
3.5
通讯作者：
F. Miglior
中科院分区：
文献类型：
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作者：
F. Malchiodi;J. Jamrozik;A. Christen;A. Fleming;G. Kistemaker;C. Richardson;V. Daniel;David F. Kelton;Flavio S. Schenkel;F. Miglior
蹄病变是现代奶牛群中的一个重要问题，不同国家报告的患病率为40%至70%。蹄病变的这种高患病率具有经济和社会后果，导致劳动力费用增加和动物生产、寿命、繁殖、健康和福利下降。因此，奶牛群的一个关键目标是减少蹄病变的发生率，这可以通过改善管理实践和遗传选择来实现。加拿大乳制品行业最近发布了一个蹄健康分项指数。这项蹄健康的国家遗传评估计划是通过建立一个集中的数据收集系统来实现的，该系统定期将蹄修剪机记录的数据传输到一个连贯和可持续的国家数据库中。使用单步基因组BLUP方法，用多性状模型分析加拿大8种最常见的病变（趾皮炎、趾间皮炎、趾间增生、足跟角糜烂、足底出血、足底溃疡、脚趾溃疡和白色线病变）。每个病变的估计基因组育种值根据其经济价值和患病率组合成一个子指数。此外，该系统中记录的数据被用来创建一个互动的管理报告，为乳制品生产商由加拿大DHI，包括患病率的农场，其趋势随着时间的推移，基准与省和国家的平均水平。
Hoof lesions represent an important issue in modern dairy herds, with reported prevalence in different countries ranging from 40 to 70%. This high prevalence of hoof lesions has both economic and social consequences, resulting in increased labor expenses and decreasing animal production, longevity, reproduction, health, and welfare. Therefore, a key goal of dairy herds is to reduce the incidence of hoof lesions, which can be achieved both by improving management practices and through genetic selection. The Canadian dairy industry has recently released a hoof health sub-index. This national genetic evaluation program for hoof health was achieved by creating a centralized data collection system that routinely transfers data recorded by hoof trimmers into a coherent and sustainable national database. The 8 most prevalent lesions (digital dermatitis, interdigital dermatitis, interdigital hyperplasia, heel horn erosion, sole hemorrhage, sole ulcer, toe ulcer, and white line lesion) in Canada are analyzed with a multiple-trait model using a single-step genomic BLUP method. Estimated genomic breeding values for each lesion are combined into a sub-index according to their economic value and prevalence. In addition, data recorded within this system were used to create an interactive management report for dairy producers by Canadian DHI, including the prevalence of lesions on farm, their trends over time, and benchmarks with provincial and national averages.