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Abstract

Additive genetic, permanent environmental, and temporary environmental variance components were estimated for 86 812 milk yield records for different regions, time periods and herd-years according their standard deviation levels for Holstein cattle in Mexico. Variances were estimated using REML and ...

Author(s)
Valencia Posadas, M.; Ruíz López, F. de J.; Montaldo, H. H.
Publisher
Facultad de Ciencias Veterinarias, Universidad del Zulia, Maracaibo, Venezuela
Citation
Revista Cientifica, Facultad de Ciencias Veterinarias, Universidad del Zulia, 2004, 14, 5, pp 404-411
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

Polynomial regression models of the first, second, and third order were used to fit milk production deviations of daughters in Mexico on Canadian and US predicted transmitting ability values for 305-d mature-equivalent milk production (kg). For the pairs Canada-Mexico and Mexico-United States, 40...

Author(s)
Montaldo, H. H.; Núñez-Soto, S. G.; Ruiz-López, F. J.; Castillo-Juárez, H.
Publisher
American Dairy Science Association, Savoy, USA
Citation
Journal of Dairy Science, 2009, 92, 10, pp 5270-5275
Abstract

Methodology survival analysis model with Weibull proportional hazards was used to study Holstein cattle duration of functional productive life (FPL) in Mexico, using a model sire-maternal grandsire with Survival Kit V3.12 software. The FPL was calculated as the number of days between the date of...

Author(s)
Abadía Rojas, J. R.; Ruíz López, F. de J.; Vega Murillo, V. E.; Montaldo, H. H.
Publisher
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), Mexico City, Mexico
Citation
Revista Mexicana de Ciencias Pecuarias, 2016, 7, 1, pp 1-14
AbstractFull Text

The objective of this study was to evaluate genotype × environment interaction (G × E) between Canada, the United States and Mexico for fertility and milk yield traits using genetic correlations between countries estimated from genetic evaluations of sires. Genetic correlation between Mexican and...

Author(s)
Montaldo, H. H.; Pelcastre-Cruz, A.; Castillo-Juárez, H.; Ruiz-López, F. J.; Miglior, F.
Publisher
Spanish National Institute for Agricultural and Food Research and Technology (INIA), Madrid, Spain
Citation
Spanish Journal of Agricultural Research, 2017, 15, 2, pp e0402

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