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Abstract

The inclusion of the inbreeding coefficient (F) into the models to predict breeding values (BV) for Jersey (J) and Brown Swiss (BS) Mexican registered dairy cattle was studied. The conventional model including the fixed effect of herd-year-season, and the genetic additive and permanent...

Author(s)
Ruíz-Flores, A.; García-Munguía, C. A.; Núñez-Domínguez, R.; Ramírez-Valverde, R.; López-Ordaz, R.; García-Muñiz, J. G.
Publisher
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), Mexico City, Mexico
Citation
Revista Mexicana de Ciencias Pecuarias, 2011, 2, 4, pp 381-391
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
Abstract

The objective of this study was to evaluate the genetic and environmental factors influencing the milk yield (MY) and reproductive traits of 1/2 Holstein × 1/2 zebu (HZ), 1/2 Brown Swiss (S) × 1/2 Z (SZ), and 3/4 S × 1/4 Z (3S1Z) crossbred cows. The lactation records (n=90) of 30 crossbred cows, 10 ...

Author(s)
Vite-Cristóbal, C.; López-Ordaz, R.; García-Muñiz, J. G.; Ramírez-Valverde, R.; Ruiz-Flores, A.; López-Ordaz, R.
Publisher
Revista Veterinaria-Mexico, Facultad de Medicina Veterinaria y Zootecnia, Mexico City, Mexico
Citation
Veterinaria México, 2007, 38, 1, pp 63-79
Abstract

The objective of this study was to evaluate the effect of environmental factors and to determine the optimum proportion of Bos taurus (BT) genes on milk yield (MY) and reproductive traits of % Holstein-Friesian (H) × 1/4 zebu (Z), 3H1Z; 3/4 Swiss (S) × 1/4 Z, 3S1Z; 1/2 H × 1/2 Z, HZ and 1/2 S × 1/2 ...

Author(s)
López-Ordaz, R.; Vite-Cristóbal, C.; Garcia-Muñiz, J. G.; Martínez-Hernández, P. A.
Publisher
Instituto de Zootecnia, Facultad de Veterinaria, Córdoba, Spain
Citation
Archivos de Zootecnia, 2009, 58, 224, pp 683-694

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