Genetic evaluation of dystocia and its relationship with productive and reproductive traits in Holstein cows

Background: dystocia is one of the most economically significant secondary traits in dairy cows and has adverse effects on the subsequent survival, health, and performance of mothers and offspring. Objective: the aim of this study was to estimate direct and maternal genetic parameters for calving ea...

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Autores principales:	Mohammad Hossein Salimi, Navid Ghavi Hossein-Zadeh, Abdol Ahad Shadparvar, Ali Reza Eghbal
Formato:	article
Lenguaje:	EN
Publicado:	Universidad de Antioquia 2017
Materias:	calving difficulty dairy cow genetic correlation genetic parameters productive performance Animal culture SF1-1100
Acceso en línea:	https://doaj.org/article/8bc1fd5852f54781b34e950a7e7c5f31
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spelling	oai:doaj.org-article:8bc1fd5852f54781b34e950a7e7c5f312021-11-26T19:19:23ZGenetic evaluation of dystocia and its relationship with productive and reproductive traits in Holstein cows2256-295810.17533/udea.rccp.v30n2a04https://doaj.org/article/8bc1fd5852f54781b34e950a7e7c5f312017-04-01T00:00:00Zhttps://revistas.udea.edu.co/index.php/rccp/article/view/326487https://doaj.org/toc/2256-2958Background: dystocia is one of the most economically significant secondary traits in dairy cows and has adverse effects on the subsequent survival, health, and performance of mothers and offspring. Objective: the aim of this study was to estimate direct and maternal genetic parameters for calving ease (CE) and its relationship with productive and reproductive traits in Iranian Holstein cows. Methods: data from 1991 through 2011 were collected from the Animal Breeding Center of Iran, and contained 132,831 records of CE, 183,203 records of productive traits including 305-d adjusted milk yield (MY305), 305-d adjusted fat yield (FY305) and 305-d adjusted protein yield (PY305), and 129,199 records of reproductive traits including days open (DO), days to first service (DFS) and calving interval (CI). Univariate and bivariate linear animal models were used for the analysis of traits in two different models on which direct genetic effect (model 1) and direct + maternal genetic effects (model 2) using AI-REML algorithm were included. Results: estimated heritabilities for CE in model 1 were 0.02 in univariate and 0.02-0.03 in bivariate analyses. Direct and maternal heritabilities in model 2 were 0.02 and 0.002 for univariate, and 0.03 and 0.0004-0.006 in bivariate analyses, respectively. Genetic correlations between direct effects of CE with MY305, FY305, and PY305 were -0.99, 0.02 and -0.07 in model 1, and -0.2, -0.02 and -0.13 in model 2, respectively. Conclusion: this study suggested that a selection index that includes both direct and maternal effects should be included in CE breeding programs. , rendimiento productivo, aca lechera. Resumo Palavras chave: correlação genética, desempenho produtivo, dificuldade de parto, parâmetros genéticos, vaca de leiteria.Mohammad Hossein SalimiNavid Ghavi Hossein-ZadehAbdol Ahad ShadparvarAli Reza EghbalUniversidad de Antioquiaarticlecalving difficultydairy cowgenetic correlationgenetic parametersproductive performanceAnimal cultureSF1-1100ENRevista Colombiana de Ciencias Pecuarias, Vol 30, Iss 2, Pp 126-137 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	calving difficulty dairy cow genetic correlation genetic parameters productive performance Animal culture SF1-1100
spellingShingle	calving difficulty dairy cow genetic correlation genetic parameters productive performance Animal culture SF1-1100 Mohammad Hossein Salimi Navid Ghavi Hossein-Zadeh Abdol Ahad Shadparvar Ali Reza Eghbal Genetic evaluation of dystocia and its relationship with productive and reproductive traits in Holstein cows
description	Background: dystocia is one of the most economically significant secondary traits in dairy cows and has adverse effects on the subsequent survival, health, and performance of mothers and offspring. Objective: the aim of this study was to estimate direct and maternal genetic parameters for calving ease (CE) and its relationship with productive and reproductive traits in Iranian Holstein cows. Methods: data from 1991 through 2011 were collected from the Animal Breeding Center of Iran, and contained 132,831 records of CE, 183,203 records of productive traits including 305-d adjusted milk yield (MY305), 305-d adjusted fat yield (FY305) and 305-d adjusted protein yield (PY305), and 129,199 records of reproductive traits including days open (DO), days to first service (DFS) and calving interval (CI). Univariate and bivariate linear animal models were used for the analysis of traits in two different models on which direct genetic effect (model 1) and direct + maternal genetic effects (model 2) using AI-REML algorithm were included. Results: estimated heritabilities for CE in model 1 were 0.02 in univariate and 0.02-0.03 in bivariate analyses. Direct and maternal heritabilities in model 2 were 0.02 and 0.002 for univariate, and 0.03 and 0.0004-0.006 in bivariate analyses, respectively. Genetic correlations between direct effects of CE with MY305, FY305, and PY305 were -0.99, 0.02 and -0.07 in model 1, and -0.2, -0.02 and -0.13 in model 2, respectively. Conclusion: this study suggested that a selection index that includes both direct and maternal effects should be included in CE breeding programs. , rendimiento productivo, aca lechera. Resumo Palavras chave: correlação genética, desempenho produtivo, dificuldade de parto, parâmetros genéticos, vaca de leiteria.
format	article
author	Mohammad Hossein Salimi Navid Ghavi Hossein-Zadeh Abdol Ahad Shadparvar Ali Reza Eghbal
author_facet	Mohammad Hossein Salimi Navid Ghavi Hossein-Zadeh Abdol Ahad Shadparvar Ali Reza Eghbal
author_sort	Mohammad Hossein Salimi
title	Genetic evaluation of dystocia and its relationship with productive and reproductive traits in Holstein cows
title_short	Genetic evaluation of dystocia and its relationship with productive and reproductive traits in Holstein cows
title_full	Genetic evaluation of dystocia and its relationship with productive and reproductive traits in Holstein cows
title_fullStr	Genetic evaluation of dystocia and its relationship with productive and reproductive traits in Holstein cows
title_full_unstemmed	Genetic evaluation of dystocia and its relationship with productive and reproductive traits in Holstein cows
title_sort	genetic evaluation of dystocia and its relationship with productive and reproductive traits in holstein cows
publisher	Universidad de Antioquia
publishDate	2017
url	https://doaj.org/article/8bc1fd5852f54781b34e950a7e7c5f31
work_keys_str_mv	AT mohammadhosseinsalimi geneticevaluationofdystociaanditsrelationshipwithproductiveandreproductivetraitsinholsteincows AT navidghavihosseinzadeh geneticevaluationofdystociaanditsrelationshipwithproductiveandreproductivetraitsinholsteincows AT abdolahadshadparvar geneticevaluationofdystociaanditsrelationshipwithproductiveandreproductivetraitsinholsteincows AT alirezaeghbal geneticevaluationofdystociaanditsrelationshipwithproductiveandreproductivetraitsinholsteincows
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Genetic evaluation of dystocia and its relationship with productive and reproductive traits in Holstein cows

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