Genetic parameters between somatic cell score and production traits for Holstein cattle in Southern Brazil

Background: Somatic cell score is an important parameter to predict milk quality and health of cows. However, in countries like Brazil, this trait is still not selected on a large scale, and no genetic parameters are reported in the literature. Objective: To estimate the variance components and gene...

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Autores principales:	Gabrieli S. Romano, Luis Fernando B. Pinto, Altair A. Valloto, José-Augusto Horst, Victor B. Pedrosa
Formato:	article
Lenguaje:	EN
Publicado:	Universidad de Antioquia 2020
Materias:	holstein genetic correlation genetic parameters heritability mastitis milk quality milk yield multi-trait model somatic cell score variance components Animal culture SF1-1100
Acceso en línea:	https://doaj.org/article/befd1c9e87924220bf8decd61587f426
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spelling	oai:doaj.org-article:befd1c9e87924220bf8decd61587f4262021-12-01T15:44:00ZGenetic parameters between somatic cell score and production traits for Holstein cattle in Southern Brazil2256-295810.17533/udea.rccp.v32n4a06https://doaj.org/article/befd1c9e87924220bf8decd61587f4262020-01-01T00:00:00Zhttps://revistas.udea.edu.co/index.php/rccp/article/view/338790https://doaj.org/toc/2256-2958Background: Somatic cell score is an important parameter to predict milk quality and health of cows. However, in countries like Brazil, this trait is still not selected on a large scale, and no genetic parameters are reported in the literature. Objective: To estimate the variance components and genetic parameters for somatic cell score, milk yield, fat yield, protein yield, fat percentage, and protein percentage in Holstein cows. Methods: Records from 56,718 animals were used to estimate variance components, heritability, and genetic correlations using a multi-trait animal model by the REML method. Results: The heritability estimates were 0.19 for somatic cell score, 0.22 for milk yield, 0.26 for fat yield, 0.18 for protein yield, 0.61 for fat percentage, and 0.65 for protein percentage. The estimates of genetic correlations among analyzed traits ranged from -0.50 to 0.82. Conclusion: The low heritability observed for somatic cell score indicates that selection for this trait should result in benefits related to animal health and milk quality, but only in the long term. The low correlation between productive traits and somatic cell score indicates that inclusion of somatic cell score in animal breeding programs does not interfere negatively with the genetic selection for milk yield or solids.Gabrieli S. RomanoLuis Fernando B. PintoAltair A. VallotoJosé-Augusto HorstVictor B. PedrosaUniversidad de Antioquiaarticleholsteingenetic correlationgenetic parametersheritabilitymastitismilk qualitymilk yieldmulti-trait modelsomatic cell scorevariance componentsAnimal cultureSF1-1100ENRevista Colombiana de Ciencias Pecuarias, Vol 33, Iss 1, Pp 60-70 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	holstein genetic correlation genetic parameters heritability mastitis milk quality milk yield multi-trait model somatic cell score variance components Animal culture SF1-1100
spellingShingle	holstein genetic correlation genetic parameters heritability mastitis milk quality milk yield multi-trait model somatic cell score variance components Animal culture SF1-1100 Gabrieli S. Romano Luis Fernando B. Pinto Altair A. Valloto José-Augusto Horst Victor B. Pedrosa Genetic parameters between somatic cell score and production traits for Holstein cattle in Southern Brazil
description	Background: Somatic cell score is an important parameter to predict milk quality and health of cows. However, in countries like Brazil, this trait is still not selected on a large scale, and no genetic parameters are reported in the literature. Objective: To estimate the variance components and genetic parameters for somatic cell score, milk yield, fat yield, protein yield, fat percentage, and protein percentage in Holstein cows. Methods: Records from 56,718 animals were used to estimate variance components, heritability, and genetic correlations using a multi-trait animal model by the REML method. Results: The heritability estimates were 0.19 for somatic cell score, 0.22 for milk yield, 0.26 for fat yield, 0.18 for protein yield, 0.61 for fat percentage, and 0.65 for protein percentage. The estimates of genetic correlations among analyzed traits ranged from -0.50 to 0.82. Conclusion: The low heritability observed for somatic cell score indicates that selection for this trait should result in benefits related to animal health and milk quality, but only in the long term. The low correlation between productive traits and somatic cell score indicates that inclusion of somatic cell score in animal breeding programs does not interfere negatively with the genetic selection for milk yield or solids.
format	article
author	Gabrieli S. Romano Luis Fernando B. Pinto Altair A. Valloto José-Augusto Horst Victor B. Pedrosa
author_facet	Gabrieli S. Romano Luis Fernando B. Pinto Altair A. Valloto José-Augusto Horst Victor B. Pedrosa
author_sort	Gabrieli S. Romano
title	Genetic parameters between somatic cell score and production traits for Holstein cattle in Southern Brazil
title_short	Genetic parameters between somatic cell score and production traits for Holstein cattle in Southern Brazil
title_full	Genetic parameters between somatic cell score and production traits for Holstein cattle in Southern Brazil
title_fullStr	Genetic parameters between somatic cell score and production traits for Holstein cattle in Southern Brazil
title_full_unstemmed	Genetic parameters between somatic cell score and production traits for Holstein cattle in Southern Brazil
title_sort	genetic parameters between somatic cell score and production traits for holstein cattle in southern brazil
publisher	Universidad de Antioquia
publishDate	2020
url	https://doaj.org/article/befd1c9e87924220bf8decd61587f426
work_keys_str_mv	AT gabrielisromano geneticparametersbetweensomaticcellscoreandproductiontraitsforholsteincattleinsouthernbrazil AT luisfernandobpinto geneticparametersbetweensomaticcellscoreandproductiontraitsforholsteincattleinsouthernbrazil AT altairavalloto geneticparametersbetweensomaticcellscoreandproductiontraitsforholsteincattleinsouthernbrazil AT joseaugustohorst geneticparametersbetweensomaticcellscoreandproductiontraitsforholsteincattleinsouthernbrazil AT victorbpedrosa geneticparametersbetweensomaticcellscoreandproductiontraitsforholsteincattleinsouthernbrazil
_version_	1718404838733119488

Genetic parameters between somatic cell score and production traits for Holstein cattle in Southern Brazil

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