Article
Interaction between milk yield of Holstein cows in Mexico and the United States.
Journal of dairy science - 1 Oct 1999
Cienfuegos-Rivas E G, Oltenacu P A, Blake R W, Schwager S J, Castillo-Juarez H, Ruiz F J
Abstract excerpt
Genotype by environment interaction for milk yield was investigated by analyzing 55,162 mature equivalent, first lactation records of daughters from 1339 Holstein sires in Mexico and 499,401 daughters from 663 Holstein sires in the northeastern US. There were 474 US sires in common. Herd-year standard deviation was used to define non-overlapping high (> or = 1600 kg) and low (< or = 1300 kg) Mexican environments...
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