Article
Derivation and genome-wide association study of a principal component-based measure of heat tolerance in dairy cattle.
Journal of dairy science - 1 Jun 2017
Macciotta N P P, Biffani S, Bernabucci U, Lacetera N, Vitali A, Ajmone-Marsan P, Nardone A
Abstract excerpt
Heat stress represents a key factor that negatively affects the productive and reproductive performance of farm animals. In the present work, a new measure of tolerance to heat stress for dairy cattle was developed using principal component analysis. Data were from 590,174 test-day records for milk yield, fat and protein percentages, and somatic cell score of 39,261 Italian Holstein cows. Test-day records...
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