Parameters and genetic trends for reproductive characteristics of a closed Angus herd

Background: Closed breeding populations are usefull to conduct basic and applied research. The Wye Angus herd is one of them. It was founded using only a few animals. The pedigree of the descendants of the original herd can be completely described by historical records resulting from strong selectio...

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Autores principales:	Vanius B. Falleiro, Paulo L. S. Carneiro, Jose A. Carrilo, Marcos P. G. Rezende, Marcelo Cervini, Carlos H. M. Malhado
Formato:	article
Lenguaje:	EN
Publicado:	Universidad de Antioquia 2019
Materias:	angus bayesian cattle genetic trends genetic variability genetic parameters heritability pedigree reproductive traits sire Animal culture SF1-1100
Acceso en línea:	https://doaj.org/article/485f6b258fc142f29cf8d35be23692bc
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spelling	oai:doaj.org-article:485f6b258fc142f29cf8d35be23692bc2021-12-01T18:49:31ZParameters and genetic trends for reproductive characteristics of a closed Angus herd2256-295810.17533/udea.rccp.v32n3a04https://doaj.org/article/485f6b258fc142f29cf8d35be23692bc2019-07-01T00:00:00Zhttps://revistas.udea.edu.co/index.php/rccp/article/view/336447https://doaj.org/toc/2256-2958Background: Closed breeding populations are usefull to conduct basic and applied research. The Wye Angus herd is one of them. It was founded using only a few animals. The pedigree of the descendants of the original herd can be completely described by historical records resulting from strong selection. Wye Angus genetics has influenced that of Aberdeen Angus, Red Angus, and Brangus cattle worldwide. Objective: To evaluate parameters and genetic trends associated with the reproduction traits of the Wye Angus herd between the years 1937 and 2012. Methods: We used pedigree information of 11,692 individuals. The reproductive traits assessed were age at first calving (AFC), calving interval (CI), and scrotal circumference (SC). The covariance components were estimated by Bayesian inference. The genetic trends were obtained by linear regression of the genetic values over birth years of the animals. Results: The heritability estimates for AFC, and CI were negligible, although a small genetic gain was associated with CI. Because the AFC and CI values of the herd are small, past reproductive management has produced favourable results for the heifers. Conclusion: The Wye Angus herd has enough genetic variability for genetic gain through selection on SC.Vanius B. FalleiroPaulo L. S. CarneiroJose A. CarriloMarcos P. G. RezendeMarcelo CerviniCarlos H. M. MalhadoUniversidad de Antioquiaarticleangusbayesiancattlegenetic trendsgenetic variabilitygenetic parametersheritabilitypedigreereproductive traitssireAnimal cultureSF1-1100ENRevista Colombiana de Ciencias Pecuarias, Vol 32, Iss 3, Pp 192-200 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	angus bayesian cattle genetic trends genetic variability genetic parameters heritability pedigree reproductive traits sire Animal culture SF1-1100
spellingShingle	angus bayesian cattle genetic trends genetic variability genetic parameters heritability pedigree reproductive traits sire Animal culture SF1-1100 Vanius B. Falleiro Paulo L. S. Carneiro Jose A. Carrilo Marcos P. G. Rezende Marcelo Cervini Carlos H. M. Malhado Parameters and genetic trends for reproductive characteristics of a closed Angus herd
description	Background: Closed breeding populations are usefull to conduct basic and applied research. The Wye Angus herd is one of them. It was founded using only a few animals. The pedigree of the descendants of the original herd can be completely described by historical records resulting from strong selection. Wye Angus genetics has influenced that of Aberdeen Angus, Red Angus, and Brangus cattle worldwide. Objective: To evaluate parameters and genetic trends associated with the reproduction traits of the Wye Angus herd between the years 1937 and 2012. Methods: We used pedigree information of 11,692 individuals. The reproductive traits assessed were age at first calving (AFC), calving interval (CI), and scrotal circumference (SC). The covariance components were estimated by Bayesian inference. The genetic trends were obtained by linear regression of the genetic values over birth years of the animals. Results: The heritability estimates for AFC, and CI were negligible, although a small genetic gain was associated with CI. Because the AFC and CI values of the herd are small, past reproductive management has produced favourable results for the heifers. Conclusion: The Wye Angus herd has enough genetic variability for genetic gain through selection on SC.
format	article
author	Vanius B. Falleiro Paulo L. S. Carneiro Jose A. Carrilo Marcos P. G. Rezende Marcelo Cervini Carlos H. M. Malhado
author_facet	Vanius B. Falleiro Paulo L. S. Carneiro Jose A. Carrilo Marcos P. G. Rezende Marcelo Cervini Carlos H. M. Malhado
author_sort	Vanius B. Falleiro
title	Parameters and genetic trends for reproductive characteristics of a closed Angus herd
title_short	Parameters and genetic trends for reproductive characteristics of a closed Angus herd
title_full	Parameters and genetic trends for reproductive characteristics of a closed Angus herd
title_fullStr	Parameters and genetic trends for reproductive characteristics of a closed Angus herd
title_full_unstemmed	Parameters and genetic trends for reproductive characteristics of a closed Angus herd
title_sort	parameters and genetic trends for reproductive characteristics of a closed angus herd
publisher	Universidad de Antioquia
publishDate	2019
url	https://doaj.org/article/485f6b258fc142f29cf8d35be23692bc
work_keys_str_mv	AT vaniusbfalleiro parametersandgenetictrendsforreproductivecharacteristicsofaclosedangusherd AT paulolscarneiro parametersandgenetictrendsforreproductivecharacteristicsofaclosedangusherd AT joseacarrilo parametersandgenetictrendsforreproductivecharacteristicsofaclosedangusherd AT marcospgrezende parametersandgenetictrendsforreproductivecharacteristicsofaclosedangusherd AT marcelocervini parametersandgenetictrendsforreproductivecharacteristicsofaclosedangusherd AT carloshmmalhado parametersandgenetictrendsforreproductivecharacteristicsofaclosedangusherd
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Parameters and genetic trends for reproductive characteristics of a closed Angus herd

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