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Abstract

Stochastically simulated dairy herds with genetic, economic and managerial parameters for milk, fat and protein production in Italy, The Netherlands and the United States, and for milk yield in Mexico for investment horizons of 10 and 20 years were used to evaluate sire selection strategies. One to ...

Author(s)
Montaldo, H. H.; Keown, J. F.; Vleck, L. D. van; Tassell, C. P. van
Publisher
Revista Veterinaria-Mexico, Facultad de Medicina Veterinaria y Zootecnia, Mexico City, Mexico
Citation
Veterinaria México, 2003, 34, 2, pp 179-201
Abstract

The aim of this study was to estimate genetic and phenotypic (co)variances for lactation curve traits and for days open in Holstein cows. Data included 1 579 lactations from 766 cows, daughters of 126 sires in a dairy herd in northern Mexico. The studied traits within lactation were days open (DO), ...

Author(s)
López-Ordaz, R.; Castillo-Juárez, H.; Montaldo, H. H.
Publisher
Veterinaria Mexico, Revista de la Facultad de Medicina Veterinaria y Zootecnia, Coyoacan, Mexico
Citation
Veterinaria México, 2009, 40, 4, pp 343-356