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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

The purpose of this study was to examine the genetic variability of the Mexican Simmental. Inbreeding was calculated by year for animals born from 1985 to 2014. Proportion of ancestors known, average equivalent complete generations, generation interval, and effective size, as well as the effective...

Author(s)
Ríos Utrera, Á.; Vega Murillo, V. E.; Montaño Bermúdez, M.; Martínez Velázquez, G.; Román Ponce, S. I.
Publisher
Sociedade Brasileira de Zootecnia, Viçosa, Brazil
Citation
Revista Brasileira de Zootecnia, 2018, 47, pp e20160088
Abstract

The aim of this study was to compare alternative models for the genetic evaluation of heifer fertility in Simmental-Simbrah cattle. The analyses were conducted using a database with 37,390 female birth information recorded from 1984 to 2007, and 59,018 individuals in the pedigree. Three generalized ...

Author(s)
Baeza-Rodríguez, J. J.; Montaño-Bermúdez, M.; Vega-Murillo, V. E.; Arechavaleta-Velasco, M. E.
Publisher
Taylor & Francis, Abingdon, UK
Citation
Journal of Applied Animal Research, 2018, 46, 1, pp 534-540
Abstract

Background: Knowledge of genetic correlations and the economics of traits are essential to decide which traits should be used as selection criteria. Objective: To estimate heritabilities and genetic, environmental, and phenotypic correlations, and direct (DRS) and correlated (CRS) responses to...

Author(s)
Ríos-Utrera, Á.; Montaño-Bermúdez, M.; Vega-Murillo, V. E.; Velázquez, G. M.; Baeza-Rodríguez, J. J.
Publisher
Universidad de Antioquia, Medellín, Colombia
Citation
Revista Colombiana de Ciencias Pecuarias, 2018, 31, 3, pp 204-212
Abstract

In order to estimate the genetic parameters and correlations between total lactation milk yield and growth traits in a multiracial population of dual purpose cattle in tropical environments of Mexico, genetic variances and covariances were estimated between total milk yield during the first (PTL1...

Author(s)
Román-Ponce, S. I.; Ruiz-López, F. J.; Romano-Muñoz, J. L.; Vásquez-Peláez, C. G.; Vega-Murillo, V. E.; Román-Ponce, H.
Publisher
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), Mexico City, Mexico
Citation
Revista Mexicana de Ciencias Pecuarias, 2018, 9, 2, pp 316-327
AbstractFull Text

The aim was to assess differences among Brown Swiss (BS), Holstein (HO), BS × HO and HO × BS cows. Age (AFC) and weight at first calving (WFC) were analyzed with a simple model that included sire within breed group (SIRE) as a random effect, and breed group (BG), calving year (CY) and calving...

Author(s)
Calderón-Robles, R. C.; Ríos-Utrera, A.; Vega-Murillo, V. E.; Montaño-Bermúdez, M.; Martínez-Velázquez, G.; Román-Ponce, S. I.; Calderón-Chagoya, R.
Publisher
Pakistan Agricultural Scientists Forum, Lahore, Pakistan
Citation
JAPS, Journal of Animal and Plant Sciences, 2017, 27, 6, pp 1816-1821
Abstract

The objective was to evaluate the effect of some environmental factors on milk yield (per lactation, per day (d) and per calving interval), lactation length and reproduction (age and weight at first breeding, age at first calving, calving interval) of Holstein × Zebu and Brown Swiss × Zebu cows in...

Author(s)
Calderón-Chagoya, R.; Calderón-Robles, R. C.; Ríos-Utrera, Á.; Montaño-Bermúdez, M.; Lagunes-Lagunes, J.; Vega-Murillo, V. E.
Publisher
Facultad de Ciencias Veterinarias, Universidad del Zulia, Maracaibo, Venezuela
Citation
Revista Cientifica, Facultad de Ciencias Veterinarias, Universidad del Zulia, 2016, 26, 4, pp 239-246
Abstract

Data recorded from 1997 to 2009 by the Charolais-Charbray Herd Book of Mexico were analyzed with six different animal models to estimate genetic parameters for birth weight (n=105,599), weaning weight adjusted to 205 d (n=89,111) and yearling weight adjusted to 365 days (n=55,284). Model 1 included ...

Author(s)
Ríos Utrera, Á.; Martínez Velázquez, G.; Vega Murillo, V. E.; Montaño Bermúdez, M.
Publisher
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), Mexico City, Mexico
Citation
Revista Mexicana de Ciencias Pecuarias, 2012, 3, 3, pp 275-290
Abstract

The aim of the present study was to estimate (co)variance components and genetic correlations of days open with milk yield per lactation, lactation length and metabolic weight in Holstein and Brown Swiss cows under subtropical conditions of Mexico. Cows were kept in an intensive rotational grazing...

Author(s)
Ríos-Utrera, Á.; Calderón-Robles, R. C.; Galavíz-Rodríguez, J. R.; Vega-Murillo, V. E.; Lagunes-Lagunes, J.
Publisher
Facultad de Ciencias Veterinarias, Universidad del Zulia, Maracaibo, Venezuela
Citation
Revista Cientifica, Facultad de Ciencias Veterinarias, Universidad del Zulia, 2015, 25, 1, pp 51-56
Abstract

Records of 354 Holstein Friesian (HF) and Brown Swiss (BS) cows born from 1986 to 2006 at Las Margaritas research station, under subtropical conditions of Mexico, were analyzed to estimate milk yield per lactation (MYL, n=1229), milk yield per day (MYD, n=1227), milk yield per calving interval...

Author(s)
Ríos-Utrera, Á.; Calderón-Robles, R. C.; Galavíz-Rodríguez, J. R.; Vega-Murillo, V. E.; Lagunes-Lagunes, J.
Publisher
Maxwell Scientific Organization, Birmingham, UK
Citation
International Journal of Animal and Veterinary Advances, 2013, 5, 6, pp 226-232

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