Genetic parameters for scrotal circumference, frame score and yearling weight of Mexican Charolais and Charbray young bulls

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 selec...

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Autores principales:	Ángel Ríos-Utrera, Moisés Montaño-Bermúdez, Vicente E. Vega-Murillo, Guillermo Martínez-Velázquez, Juan J. Baeza-Rodríguez
Formato:	article
Lenguaje:	EN
Publicado:	Universidad de Antioquia 2018
Materias:	beef cattle genetic correlations heritability males phenotypic correlations response to selection Animal culture SF1-1100
Acceso en línea:	https://doaj.org/article/f2c59fce06eb405e8f726835168786b2
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spelling	oai:doaj.org-article:f2c59fce06eb405e8f726835168786b22021-12-01T19:25:55ZGenetic parameters for scrotal circumference, frame score and yearling weight of Mexican Charolais and Charbray young bulls2256-295810.17533/udea.rccp.v31n3a05https://doaj.org/article/f2c59fce06eb405e8f726835168786b22018-08-01T00:00:00Zhttps://revistas.udea.edu.co/index.php/rccp/article/view/330804https://doaj.org/toc/2256-2958Background: 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 selection by scrotal circumference (SC), frame score (FS), and yearling weight (YW) of Mexican Charolais (CH), and Charbray (CB) Young bulls. Methods: Actual SC, height and YW records (10,078 for CH, and 500 for CB) were adjusted to 365 d. The 0.0505 adjustment factor recommended by the Beef Improvement Federation was used to obtain the 365-d adjusted SC for both breeds. Height and age records were used to obtain FS. Data were analyzed using a three-trait animal model. The animal model for each trait included bull breed, contemporary group (groups of young bulls born in the same herd, year, and season of the year), and age of dam as a linear covariate as fixed effects, and direct additive genetic and residual as random effects. Results: Heritability estimates for SC, FS and YW were 0.21 ± 0.04, 0.25 ± 0.04, and 0.29 ± 0.04, respectively. The genetic correlation between YW with SC was 0.37 ± 0.16, and between YW with FS was 0.42 ± 0.16. The estimate of genetic correlation between SC and FS was low and positive (0.15 ± 0.14). The DRS was 0.38 cm, 0.18 units, and 8.30 kg for SC, FS and YW. The CRS was 0.16 cm, and 0.08 units for SC and FS from indirect selection on YW. Conclusions: Direct selection for YW is expected to be effective. Indirect selection for SC and FS based on YW would not be expected to be as effective as direct selection for improving SC and FS.Ángel Ríos-UtreraMoisés Montaño-BermúdezVicente E. Vega-MurilloGuillermo Martínez-VelázquezJuan J. Baeza-RodríguezUniversidad de Antioquiaarticlebeef cattlegenetic correlationsheritabilitymalesphenotypic correlationsresponse to selectionAnimal cultureSF1-1100ENRevista Colombiana de Ciencias Pecuarias, Vol 31, Iss 3, Pp 204-212 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	beef cattle genetic correlations heritability males phenotypic correlations response to selection Animal culture SF1-1100
spellingShingle	beef cattle genetic correlations heritability males phenotypic correlations response to selection Animal culture SF1-1100 Ángel Ríos-Utrera Moisés Montaño-Bermúdez Vicente E. Vega-Murillo Guillermo Martínez-Velázquez Juan J. Baeza-Rodríguez Genetic parameters for scrotal circumference, frame score and yearling weight of Mexican Charolais and Charbray young bulls
description	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 selection by scrotal circumference (SC), frame score (FS), and yearling weight (YW) of Mexican Charolais (CH), and Charbray (CB) Young bulls. Methods: Actual SC, height and YW records (10,078 for CH, and 500 for CB) were adjusted to 365 d. The 0.0505 adjustment factor recommended by the Beef Improvement Federation was used to obtain the 365-d adjusted SC for both breeds. Height and age records were used to obtain FS. Data were analyzed using a three-trait animal model. The animal model for each trait included bull breed, contemporary group (groups of young bulls born in the same herd, year, and season of the year), and age of dam as a linear covariate as fixed effects, and direct additive genetic and residual as random effects. Results: Heritability estimates for SC, FS and YW were 0.21 ± 0.04, 0.25 ± 0.04, and 0.29 ± 0.04, respectively. The genetic correlation between YW with SC was 0.37 ± 0.16, and between YW with FS was 0.42 ± 0.16. The estimate of genetic correlation between SC and FS was low and positive (0.15 ± 0.14). The DRS was 0.38 cm, 0.18 units, and 8.30 kg for SC, FS and YW. The CRS was 0.16 cm, and 0.08 units for SC and FS from indirect selection on YW. Conclusions: Direct selection for YW is expected to be effective. Indirect selection for SC and FS based on YW would not be expected to be as effective as direct selection for improving SC and FS.
format	article
author	Ángel Ríos-Utrera Moisés Montaño-Bermúdez Vicente E. Vega-Murillo Guillermo Martínez-Velázquez Juan J. Baeza-Rodríguez
author_facet	Ángel Ríos-Utrera Moisés Montaño-Bermúdez Vicente E. Vega-Murillo Guillermo Martínez-Velázquez Juan J. Baeza-Rodríguez
author_sort	Ángel Ríos-Utrera
title	Genetic parameters for scrotal circumference, frame score and yearling weight of Mexican Charolais and Charbray young bulls
title_short	Genetic parameters for scrotal circumference, frame score and yearling weight of Mexican Charolais and Charbray young bulls
title_full	Genetic parameters for scrotal circumference, frame score and yearling weight of Mexican Charolais and Charbray young bulls
title_fullStr	Genetic parameters for scrotal circumference, frame score and yearling weight of Mexican Charolais and Charbray young bulls
title_full_unstemmed	Genetic parameters for scrotal circumference, frame score and yearling weight of Mexican Charolais and Charbray young bulls
title_sort	genetic parameters for scrotal circumference, frame score and yearling weight of mexican charolais and charbray young bulls
publisher	Universidad de Antioquia
publishDate	2018
url	https://doaj.org/article/f2c59fce06eb405e8f726835168786b2
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_version_	1718404666287456256

Genetic parameters for scrotal circumference, frame score and yearling weight of Mexican Charolais and Charbray young bulls

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