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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
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
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

Goat breeding research in Mexico began in 1980 with studies on breed and crossbreed comparisons involving local goats and goats from specialized breeds imported from the USA, using data from a large goat breeding centre, in Tlahualilo, Durango, located in Northern Mexico. Genetic groups were...

Author(s)
Montaldo, H. H.; Torres-Hernández, G.; Valencia-Posadas, M.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Small Ruminant Research, 2010, 89, 2/3, pp 155-163
Abstract

In order to investigate the presence of genotype-region interactions for milk yield in Holstein cattle in Mexico, first lactation, 305-days mature-equivalent milk production records were used. Data were classified as belonging to three regions of the country: Northern, Central and Southern. Genetic ...

Author(s)
Valencia, M.; Montaldo, H. H.; Ruíz, F.
Publisher
Instituto de Zootecnia, Facultad de Veterinaria, Córdoba, Spain
Citation
Archivos de Zootecnia, 2008, 57, 220, pp 457-463
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

A single dose of bovine somatotrophin (bST) given at the time of insemination improves conception rate (CR) in repeat-breeding cows, but there is no clear evidence that this treatment is useful in first service cows. The effect of bST applied at the time of insemination on conception rate in first...

Author(s)
Rodríguez Castañeda, O. A.; Díaz Bolaños, R.; Ortiz González, O.; Gutiérrez, C. G.; Montaldo, H. H.; García Ortiz, C.; Hernández Cerón, J.
Publisher
Veterinaria Mexico, Revista de la Facultad de Medicina Veterinaria y Zootecnia, Coyoacan, Mexico
Citation
Veterinaria México, 2009, 40, 1, pp 1-7
AbstractFull Text

The aim of this study was to estimate phenotypic and genetic (co)variances for reproductive and lactation curve characteristic in Holstein cattle using multivariate animal models within the first three parities from 766 cows and 126 sires in a herd in Northern Mexico. Individual lactations were...

Author(s)
López-Ordaz, R.; Montaldo, H. H.; Castillo-Juárez, H.
Publisher
Instituto Prociência, Minas Gerais, Brazil
Citation
Proceedings of the 8th World Congress on Genetics Applied to Livestock Production, Belo Horizonte, Minas Gerais, Brazil, 13-18 August, 2006, 2006, pp 01-21
AbstractFull Text

The aim of this study was to estimate crossbreeding effects for milk production and reproductive traits in a multibreed population result of crosses of Holstein, Simmental and Swiss Brown × Zebu, using univariate animal models from 697 to 4923 calving records in six experimental herds in humid...

Author(s)
Montaldo, H. H.; Núñez, S. G.; Román-Ponce, S.; Ruiz-López, F.; Castillo-Juárez, H.; Román-Ponce, H.; Castañeda, O. G.
Publisher
Instituto Prociência, Minas Gerais, Brazil
Citation
Proceedings of the 8th World Congress on Genetics Applied to Livestock Production, Belo Horizonte, Minas Gerais, Brazil, 13-18 August, 2006, 2006, pp 11-09

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