Article
Effect of herd environment on the genetic and phenotypic relationships among milk yield, conception rate, and somatic cell score in Holstein cattle.
Journal of dairy science - 1 Apr 2000
Castillo-Juarez H, Oltenacu P A, Blake R W, Mcculloch C E, Cienfuegos-Rivas E G
Abstract excerpt
A total of 248,230 primiparous records of Holstein cows calving from 1987 to 1994 (daughters of 588 sires in 3042 herds) was used to evaluate potential genotype by environment interactions among mature equivalent milk yield, lactation mean somatic cell score, and conception rate at first service. Herds were classified into low and high environmental groups using three different criteria: standard deviation of...
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