Estimates of genetic correlations between days to calving and reproductive and weight traits in Nelore cattle

Detalhes bibliográficos
Autor(a) principal: Forni, S. [UNESP]
Data de Publicação: 2005
Outros Autores: Albuquerque, L. G. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.2527/2005.8371511x
http://hdl.handle.net/11449/231790
Resumo: Data comprising 53,181 calving records were analyzed to estimate the genetic correlation between days to calving (DC), and days to first calving (DFC), and the following traits: scrotal circumference (SC), age at first calving (AFC), and weight adjusted for 550 d of age (W550) in a Nelore herd. (Co)variance components were estimated using the REML method fitting bivariate animal models. The fixed effects considered for DC were contemporary group, month of last calving, and age at breeding season (linear and quadratic effects). Contemporary groups were composed by herd, year, season, and management group at birth; herd and management group at weaning; herd, season, and management group at mating; and sex of calf and mating type (multiple sires, single sire, or AI). In DFC analysis, the same fixed effects were considered excluding the month of last calving. For DC, a repeatability animal model was applied. Noncalvers were not considered in analyses because an attempt to include them, attributing a penalty, did not improve the identification of genetic differences between animals. Heritability estimates ranged from 0.04 to 0.06 for DC, from 0.06 to 0.13 for DFC, from 0.42 to 0.44 for SC, from 0.06 to 0.08 for AFC, and was 0.30 for W550. The genetic correlation estimated between DC and SC was low and negative (-0.10), between DC and AFC was high and positive (0.76), and between DC and W550 was almost null (0.07). Similar results were found for genetic correlation estimates between DFC and SC (-0.14), AFC (0.94), and W550 (-0.02). The genetic correlation estimates indicate that the use of DC in the selection of beef cattle may promote favorable correlated responses to age at first mating and, consequently, higher gains in sexual precocity can be expected. ©2005 American Society of Animal Science. All rights reserved.
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spelling Estimates of genetic correlations between days to calving and reproductive and weight traits in Nelore cattleAge at First CalvingBeef CattleDays to CalvingScrotal CircumferenceWeightZebu BreedsData comprising 53,181 calving records were analyzed to estimate the genetic correlation between days to calving (DC), and days to first calving (DFC), and the following traits: scrotal circumference (SC), age at first calving (AFC), and weight adjusted for 550 d of age (W550) in a Nelore herd. (Co)variance components were estimated using the REML method fitting bivariate animal models. The fixed effects considered for DC were contemporary group, month of last calving, and age at breeding season (linear and quadratic effects). Contemporary groups were composed by herd, year, season, and management group at birth; herd and management group at weaning; herd, season, and management group at mating; and sex of calf and mating type (multiple sires, single sire, or AI). In DFC analysis, the same fixed effects were considered excluding the month of last calving. For DC, a repeatability animal model was applied. Noncalvers were not considered in analyses because an attempt to include them, attributing a penalty, did not improve the identification of genetic differences between animals. Heritability estimates ranged from 0.04 to 0.06 for DC, from 0.06 to 0.13 for DFC, from 0.42 to 0.44 for SC, from 0.06 to 0.08 for AFC, and was 0.30 for W550. The genetic correlation estimated between DC and SC was low and negative (-0.10), between DC and AFC was high and positive (0.76), and between DC and W550 was almost null (0.07). Similar results were found for genetic correlation estimates between DFC and SC (-0.14), AFC (0.94), and W550 (-0.02). The genetic correlation estimates indicate that the use of DC in the selection of beef cattle may promote favorable correlated responses to age at first mating and, consequently, higher gains in sexual precocity can be expected. ©2005 American Society of Animal Science. All rights reserved.Faculdade de Ciências Agrárias e Veterinárias UNESP, Jaboticabal, SP, 14884-900Departamento de ZootecniaFaculdade de Ciências Agrárias e Veterinárias UNESP, Jaboticabal, SP, 14884-900Universidade Estadual Paulista (UNESP)Forni, S. [UNESP]Albuquerque, L. G. [UNESP]2022-04-29T08:47:26Z2022-04-29T08:47:26Z2005-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1511-1515http://dx.doi.org/10.2527/2005.8371511xJournal of Animal Science, v. 83, n. 7, p. 1511-1515, 2005.0021-8812http://hdl.handle.net/11449/23179010.2527/2005.8371511x2-s2.0-33645958267Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Animal Scienceinfo:eu-repo/semantics/openAccess2024-06-07T18:44:00Zoai:repositorio.unesp.br:11449/231790Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestrepositoriounesp@unesp.bropendoar:29462024-06-07T18:44Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Estimates of genetic correlations between days to calving and reproductive and weight traits in Nelore cattle
title Estimates of genetic correlations between days to calving and reproductive and weight traits in Nelore cattle
spellingShingle Estimates of genetic correlations between days to calving and reproductive and weight traits in Nelore cattle
Forni, S. [UNESP]
Age at First Calving
Beef Cattle
Days to Calving
Scrotal Circumference
Weight
Zebu Breeds
title_short Estimates of genetic correlations between days to calving and reproductive and weight traits in Nelore cattle
title_full Estimates of genetic correlations between days to calving and reproductive and weight traits in Nelore cattle
title_fullStr Estimates of genetic correlations between days to calving and reproductive and weight traits in Nelore cattle
title_full_unstemmed Estimates of genetic correlations between days to calving and reproductive and weight traits in Nelore cattle
title_sort Estimates of genetic correlations between days to calving and reproductive and weight traits in Nelore cattle
author Forni, S. [UNESP]
author_facet Forni, S. [UNESP]
Albuquerque, L. G. [UNESP]
author_role author
author2 Albuquerque, L. G. [UNESP]
author2_role author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (UNESP)
dc.contributor.author.fl_str_mv Forni, S. [UNESP]
Albuquerque, L. G. [UNESP]
dc.subject.por.fl_str_mv Age at First Calving
Beef Cattle
Days to Calving
Scrotal Circumference
Weight
Zebu Breeds
topic Age at First Calving
Beef Cattle
Days to Calving
Scrotal Circumference
Weight
Zebu Breeds
description Data comprising 53,181 calving records were analyzed to estimate the genetic correlation between days to calving (DC), and days to first calving (DFC), and the following traits: scrotal circumference (SC), age at first calving (AFC), and weight adjusted for 550 d of age (W550) in a Nelore herd. (Co)variance components were estimated using the REML method fitting bivariate animal models. The fixed effects considered for DC were contemporary group, month of last calving, and age at breeding season (linear and quadratic effects). Contemporary groups were composed by herd, year, season, and management group at birth; herd and management group at weaning; herd, season, and management group at mating; and sex of calf and mating type (multiple sires, single sire, or AI). In DFC analysis, the same fixed effects were considered excluding the month of last calving. For DC, a repeatability animal model was applied. Noncalvers were not considered in analyses because an attempt to include them, attributing a penalty, did not improve the identification of genetic differences between animals. Heritability estimates ranged from 0.04 to 0.06 for DC, from 0.06 to 0.13 for DFC, from 0.42 to 0.44 for SC, from 0.06 to 0.08 for AFC, and was 0.30 for W550. The genetic correlation estimated between DC and SC was low and negative (-0.10), between DC and AFC was high and positive (0.76), and between DC and W550 was almost null (0.07). Similar results were found for genetic correlation estimates between DFC and SC (-0.14), AFC (0.94), and W550 (-0.02). The genetic correlation estimates indicate that the use of DC in the selection of beef cattle may promote favorable correlated responses to age at first mating and, consequently, higher gains in sexual precocity can be expected. ©2005 American Society of Animal Science. All rights reserved.
publishDate 2005
dc.date.none.fl_str_mv 2005-01-01
2022-04-29T08:47:26Z
2022-04-29T08:47:26Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.2527/2005.8371511x
Journal of Animal Science, v. 83, n. 7, p. 1511-1515, 2005.
0021-8812
http://hdl.handle.net/11449/231790
10.2527/2005.8371511x
2-s2.0-33645958267
url http://dx.doi.org/10.2527/2005.8371511x
http://hdl.handle.net/11449/231790
identifier_str_mv Journal of Animal Science, v. 83, n. 7, p. 1511-1515, 2005.
0021-8812
10.2527/2005.8371511x
2-s2.0-33645958267
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Journal of Animal Science
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 1511-1515
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv repositoriounesp@unesp.br
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