Genetic parameters for milk urea and its relationship with milk yield and compositions in Holstein dairy cows.

The aim was to estimate genetic parameters for milk urea (MU) concentration and its relationship with milk yield and compositions in Holstein dairy Cows. Edited data were 90,594 test-day records of milk yield and composition collected during 2015 to 2018 on 13,737 lactations obtained from 7,850 Hols...

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Autores principales:	Hadi Atashi, Miel Hostens, GplusE consortium
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/08d1ed2a988b4dbab2da8ec0970f2f36
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spelling	oai:doaj.org-article:08d1ed2a988b4dbab2da8ec0970f2f362021-12-02T20:10:24ZGenetic parameters for milk urea and its relationship with milk yield and compositions in Holstein dairy cows.1932-620310.1371/journal.pone.0253191https://doaj.org/article/08d1ed2a988b4dbab2da8ec0970f2f362021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0253191https://doaj.org/toc/1932-6203The aim was to estimate genetic parameters for milk urea (MU) concentration and its relationship with milk yield and compositions in Holstein dairy Cows. Edited data were 90,594 test-day records of milk yield and composition collected during 2015 to 2018 on 13,737 lactations obtained from 7,850 Holstein cows in 50 herds. Random regression test-day model was used to estimate genetic parameters. (Co)variance components were estimated with the Bayesian Gibbs sampling method using a single chain of 400,000 iterates. The first 50,000 iterates of each chain were regarded as a burn-in period. Mean (SD) of MU was 23.03 (5.99) and 22.41 (5.74) mg/dl in primiparous and multiparous cows, respectively. Average heritability estimates for daily MU was 0.33 (SD = 0.02) ranged 0.29 to 0.36 and 0.32 (SD = 0.03) ranged 0.27 to 0.34, respectively, for primiparous and multiparous cows. The mean (SD) genetic correlation between MU and milk yield, fat yield, protein yield, lactose yield, fat percentage, protein percentage, lactose percentage, and somatic cell score was, respectively, -0.02 (0.03), -0.02 (0.01), 0.01 (0.04), 0.01 (0.03), 0.00 (0.07), -0.03 (0.04), 0.00 (0.01), -0.11 (0.06) in primiparous cows. The corresponding values in multiparous cows were -0.01 (0.02), -0.01 (0.03), -0.04 (0.04), -0.04 (0.04), 0.04 (0.04), 0.04 (0.07), -0.03 (0.09), 0.06 (0.11), respectively. The results indicate that selection on MU is possible with no effect on milk yield or compositions, however, relationships between MU and other important traits such as longevity, metabolic diseases, and fertility are needed.Hadi AtashiMiel HostensGplusE consortiumPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 6, p e0253191 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hadi Atashi Miel Hostens GplusE consortium Genetic parameters for milk urea and its relationship with milk yield and compositions in Holstein dairy cows.
description	The aim was to estimate genetic parameters for milk urea (MU) concentration and its relationship with milk yield and compositions in Holstein dairy Cows. Edited data were 90,594 test-day records of milk yield and composition collected during 2015 to 2018 on 13,737 lactations obtained from 7,850 Holstein cows in 50 herds. Random regression test-day model was used to estimate genetic parameters. (Co)variance components were estimated with the Bayesian Gibbs sampling method using a single chain of 400,000 iterates. The first 50,000 iterates of each chain were regarded as a burn-in period. Mean (SD) of MU was 23.03 (5.99) and 22.41 (5.74) mg/dl in primiparous and multiparous cows, respectively. Average heritability estimates for daily MU was 0.33 (SD = 0.02) ranged 0.29 to 0.36 and 0.32 (SD = 0.03) ranged 0.27 to 0.34, respectively, for primiparous and multiparous cows. The mean (SD) genetic correlation between MU and milk yield, fat yield, protein yield, lactose yield, fat percentage, protein percentage, lactose percentage, and somatic cell score was, respectively, -0.02 (0.03), -0.02 (0.01), 0.01 (0.04), 0.01 (0.03), 0.00 (0.07), -0.03 (0.04), 0.00 (0.01), -0.11 (0.06) in primiparous cows. The corresponding values in multiparous cows were -0.01 (0.02), -0.01 (0.03), -0.04 (0.04), -0.04 (0.04), 0.04 (0.04), 0.04 (0.07), -0.03 (0.09), 0.06 (0.11), respectively. The results indicate that selection on MU is possible with no effect on milk yield or compositions, however, relationships between MU and other important traits such as longevity, metabolic diseases, and fertility are needed.
format	article
author	Hadi Atashi Miel Hostens GplusE consortium
author_facet	Hadi Atashi Miel Hostens GplusE consortium
author_sort	Hadi Atashi
title	Genetic parameters for milk urea and its relationship with milk yield and compositions in Holstein dairy cows.
title_short	Genetic parameters for milk urea and its relationship with milk yield and compositions in Holstein dairy cows.
title_full	Genetic parameters for milk urea and its relationship with milk yield and compositions in Holstein dairy cows.
title_fullStr	Genetic parameters for milk urea and its relationship with milk yield and compositions in Holstein dairy cows.
title_full_unstemmed	Genetic parameters for milk urea and its relationship with milk yield and compositions in Holstein dairy cows.
title_sort	genetic parameters for milk urea and its relationship with milk yield and compositions in holstein dairy cows.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/08d1ed2a988b4dbab2da8ec0970f2f36
work_keys_str_mv	AT hadiatashi geneticparametersformilkureaanditsrelationshipwithmilkyieldandcompositionsinholsteindairycows AT mielhostens geneticparametersformilkureaanditsrelationshipwithmilkyieldandcompositionsinholsteindairycows AT gpluseconsortium geneticparametersformilkureaanditsrelationshipwithmilkyieldandcompositionsinholsteindairycows
_version_	1718374983055441920

Genetic parameters for milk urea and its relationship with milk yield and compositions in Holstein dairy cows.

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