Article
Detrimental effect of selection for milk yield on genetic tolerance to heat stress in purebred Zebu cattle: Genetic parameters and trends.
Journal of dairy science - 1 Dec 2015
Santana M L, Pereira R J, Bignardi A B, Filho A E Vercesi, Menéndez-Buxadera A, El Faro L
Abstract excerpt
In an attempt to determine the possible detrimental effects of continuous selection for milk yield on the genetic tolerance of Zebu cattle to heat stress, genetic parameters and trends of the response to heat stress for 86,950 test-day (TD) milk yield records from 14,670 first lactations of purebred dairy Gir cows were estimated. A random regression model with regression on days in milk (DIM) and...
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