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Abstract

Variance components and genetic parameters were estimated for total milk production at first lactation (MP1), milk yield adjusted to 305 d and adult equivalent at the first lactation (MP1std), total milk production of the first five lactations (MP5) and milk yield adjusted to 305 d and mature...

Author(s)
Toledo Alvarado, H. O.; Ruiz López, F. de J.; Vásquez Peláez, C. G.; Berruecos Villalobos, J. M.; Elzo, M. A.
Publisher
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), Mexico City, Mexico
Citation
Revista Mexicana de Ciencias Pecuarias, 2014, 5, 4, pp 443-457
Abstract

Crossbreeding effects were evaluated in three dual purpose bovine sub-populations in the tropics, and 5,040 lactations, 4,429 birth weights and adjusted weights at 205 [3,878], 365 [3,017] and 540 [2,276] days (PN, P205, P365 y P540, respectively) from Zebu cattle (CE) and its crosses with Holstein ...

Author(s)
Román-Ponce, S. I.; Ruiz-López, F. de J.; Montaldo, H. H.; Rizzi, R.; Román-Ponce, H.
Publisher
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), Mexico City, Mexico
Citation
Revista Mexicana de Ciencias Pecuarias, 2013, 4, 4, pp 405-416
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
Abstract

Records of milk production adjusted to 305 d, adult equivalent of the first lactation and two milking were used. Those come from the National Breeding in Mexico PNMG (n=163.885), which includes records of the Holstein Association of Mexico (AHM) (n=43.668) and National Bank of Dairy Information...

Author(s)
Toledo Alvarado, H. O.; Ruiz López, F. de J.; Vázquez Peláez, C. G.; Berruecos Villalobos, J. M.; Elzo, M. A.
Publisher
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), Mexico City, Mexico
Citation
Revista Mexicana de Ciencias Pecuarias, 2014, 5, 4, pp 471-485
Abstract

Heritabilities (h2) and genetic (rg) and phenotypic (rf) correlations were estimated for 11 primary conformation traits, first lactation milk yield (PL1) and stayability to 48 months of age (HP48) in Holstein [Holstein-Friesian] cattle in Mexico. Classification and milk production data were used to ...

Author(s)
Valencia Posadas, M.; Montaldo Valdenegro, H. H.; Ruíz López, F. de J.
Publisher
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), Mexico City, Mexico
Citation
Técnica Pecuaria en México, 2008, 46, 3, pp 235-248
Abstract

Data (1970-97) from 47 609 cows and pedigree information from 57 787 Holstein cattle were used to estimate heritabilities, as well as genetic and phenotypic correlations for length of productive life until third lactation (DVP), total milk production until third lactation (PTA), ability to maintain ...

Author(s)
Valencia Posadas, M.; Ruíz López, F. de J.; Montaldo Valdenegro, H. H.
Publisher
Asociación Interciencia, Caracas, Venezuela
Citation
Interciencia, 2004, 29, 1, pp 52-56
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

Records on 8954 Holstein cows classified for 17 linear conformation traits scored on a scale from 1 to 9 at first classification by the Holstein Association of Mexico were analysed to estimate genetic parameters and to predict breeding values using both derivative-free Restricted Maximum Likelihood ...

Author(s)
Moro Méndez, J.; J. Ruiz López, F. de
Citation
Técnica Pecuaria en México, 1999, 37, 1, pp 41-53

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