What next in breeding for the health traits of dairy cattle in the Czech Republic?
The breeding for health traits in dairy cattle is the aim of the paper. There is a description of genomic breeding values estimation for four health traits: incidence of clinical mastitis and three group the foot and claw diseases. Breeders voluntarily register input data on the occurrence of diseases in the Diary of Diseases and Treatment, an internet application of the Czech-Moravian Breeders Association. Almost 950,000 individual records were collected between 2017 and 2021. The breeding values obtained for four health traits are used to determine the health index. The genomic bulls that represented the two outliers of the index were used for creating the two groups of bulls. Those sires with a low health index had daughters with several higher disease rates than daughters of bulls with a high health index. The incidence was 4.2 times higher in the low health index group when expressed per daughter for clinical mastitis.
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