Genetic parameters for milk yield and reproduction traits in the Chilean Dairy Overo Colorado cattle breed

The objective of this study was to estimate genetic parameters for milk production and reproduction traits using phenotypic and pedigree information from the Dairy Overo Colorado breed from southern Chile. Single- and multi-trait mixed models were used to analyze the data. Analyses were performed us...

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Autores principales:	Montaldo,Hugo H, Trejo,Carlos, Lizana,Carlos
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal 2017
Materias:	Breeding Chile correlation heritability local cattle breed
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202017000100003
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spelling	oai:scielo:S0718-162020170001000032017-05-31Genetic parameters for milk yield and reproduction traits in the Chilean Dairy Overo Colorado cattle breedMontaldo,Hugo HTrejo,CarlosLizana,Carlos Breeding Chile correlation heritability local cattle breed The objective of this study was to estimate genetic parameters for milk production and reproduction traits using phenotypic and pedigree information from the Dairy Overo Colorado breed from southern Chile. Single- and multi-trait mixed models were used to analyze the data. Analyses were performed using ASReml software. The heritability estimates for milk yield, fat yield, protein yield, fat content, protein content, age at first calving and calving interval were 0.29 ± 0.04, 0.34 ± 0.04, 0.30 ± 0.04, 0.56 ± 0.04, 0.56 ± 0.04, 0.01 ± 0.07 and 0.002 ± 0.02, respectively. The genetic correlations between yield traits were high and positive (≥ 0.81). The genetic correlations of milk yield with fat content (-0.32) and protein content (-0.34) were unfavorable. The genetic correlation estimates between age at first calving and yield traits were negative, ranging between -0.71 and -0.29. The phenotypic correlations between calving interval and milk yield traits were slightly positive (0.06-0.09), suggesting a weak relationship between reproduction and yield in this population. Genetic variation was significantly greater than zero for milk production traits. Genetic improvement for age at first calving and calving interval may be slow because small differences between animals and low reliabilities are expected for estimated breeding values for these traits due to heritabilities close to zero. The design of an efficient breeding program for yield traits based on artificial insemination for this population is feasible using either progeny testing or genomic breeding value prediction to select sires.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalCiencia e investigación agraria v.44 n.1 20172017-04-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202017000100003en10.7764/rcia.v44i1.1562
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Breeding Chile correlation heritability local cattle breed
spellingShingle	Breeding Chile correlation heritability local cattle breed Montaldo,Hugo H Trejo,Carlos Lizana,Carlos Genetic parameters for milk yield and reproduction traits in the Chilean Dairy Overo Colorado cattle breed
description	The objective of this study was to estimate genetic parameters for milk production and reproduction traits using phenotypic and pedigree information from the Dairy Overo Colorado breed from southern Chile. Single- and multi-trait mixed models were used to analyze the data. Analyses were performed using ASReml software. The heritability estimates for milk yield, fat yield, protein yield, fat content, protein content, age at first calving and calving interval were 0.29 ± 0.04, 0.34 ± 0.04, 0.30 ± 0.04, 0.56 ± 0.04, 0.56 ± 0.04, 0.01 ± 0.07 and 0.002 ± 0.02, respectively. The genetic correlations between yield traits were high and positive (≥ 0.81). The genetic correlations of milk yield with fat content (-0.32) and protein content (-0.34) were unfavorable. The genetic correlation estimates between age at first calving and yield traits were negative, ranging between -0.71 and -0.29. The phenotypic correlations between calving interval and milk yield traits were slightly positive (0.06-0.09), suggesting a weak relationship between reproduction and yield in this population. Genetic variation was significantly greater than zero for milk production traits. Genetic improvement for age at first calving and calving interval may be slow because small differences between animals and low reliabilities are expected for estimated breeding values for these traits due to heritabilities close to zero. The design of an efficient breeding program for yield traits based on artificial insemination for this population is feasible using either progeny testing or genomic breeding value prediction to select sires.
author	Montaldo,Hugo H Trejo,Carlos Lizana,Carlos
author_facet	Montaldo,Hugo H Trejo,Carlos Lizana,Carlos
author_sort	Montaldo,Hugo H
title	Genetic parameters for milk yield and reproduction traits in the Chilean Dairy Overo Colorado cattle breed
title_short	Genetic parameters for milk yield and reproduction traits in the Chilean Dairy Overo Colorado cattle breed
title_full	Genetic parameters for milk yield and reproduction traits in the Chilean Dairy Overo Colorado cattle breed
title_fullStr	Genetic parameters for milk yield and reproduction traits in the Chilean Dairy Overo Colorado cattle breed
title_full_unstemmed	Genetic parameters for milk yield and reproduction traits in the Chilean Dairy Overo Colorado cattle breed
title_sort	genetic parameters for milk yield and reproduction traits in the chilean dairy overo colorado cattle breed
publisher	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202017000100003
work_keys_str_mv	AT montaldohugoh geneticparametersformilkyieldandreproductiontraitsinthechileandairyoverocoloradocattlebreed AT trejocarlos geneticparametersformilkyieldandreproductiontraitsinthechileandairyoverocoloradocattlebreed AT lizanacarlos geneticparametersformilkyieldandreproductiontraitsinthechileandairyoverocoloradocattlebreed
_version_	1714202175683428352

Genetic parameters for milk yield and reproduction traits in the Chilean Dairy Overo Colorado cattle breed

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