Influence of different environmental challenges on the expression of reproductive traits in Holstein cattle in Southern Brazil

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Autor(es): dc.contributorUniversidade Federal do Paraná (UFPR)-
Autor(es): dc.contributorUniversity of Wisconsin- Madison-
Autor(es): dc.contributorParaná Association of Holstein Cattle Breeders-
Autor(es): dc.contributorPrincipal Research Scientist at the Commonwealth Scientific and Industrial Research Organization (CSIRO)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorMartins, Rafaela-
Autor(es): dc.creatorNascimento, Bárbara Mazetti-
Autor(es): dc.creatorValloto, Altair Antônio-
Autor(es): dc.creatorCarvalheiro, Roberto-
Autor(es): dc.creatorde Albuquerque, Lucia Galvão-
Autor(es): dc.creatorde Almeida Teixeira, Rodrigo-
Autor(es): dc.creatorDias, Laila Talarico-
Data de aceite: dc.date.accessioned2025-08-21T19:52:13Z-
Data de disponibilização: dc.date.available2025-08-21T19:52:13Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-10-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s11250-024-04133-5-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/304569-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/304569-
Descrição: dc.descriptionThe aim of this study was to assess the impact of genotype-environment interaction (GEI) on the manifestation of traits such as age at first calving (AFC), age at first service (AFS), and calving interval (CI) through the application of the reaction norm model in Holstein cattle raised in Paraná state, Brazil. Utilizing data from the milk testing service of the Paraná Association of Holstein Cattle Breeders (APCBRH), this study analyzed records from 179,492 animals undergoing their first, second, and third lactations from the years 2012 to 2022. These animals were part of 513 herds spread across 72 municipalities in Paraná. The environmental gradient was established by normalizing contemporary group solutions, derived from the animal model, with the 305-day-corrected milk yield serving as the dependent variable. Subsequently, reaction norms were determined utilizing a Random Regression Model. Spearman’s correlation was then applied to compare the estimates of breeding values across different environmental gradients for the studied traits. The highest EG (+ 4) indicates the least challenging environments, where animals experience better environmental conditions. Conversely, lower EG (-4) values represent the most challenging environments, where animals endure worse conditions. The only trait that exhibited a moderate heritability magnitude was AFC (0.23) in the least challenging environmental condition. The other traits were classified as having low heritability magnitudes regardless of the evaluated environmental gradient. While minimal evidence was found for the influence of GEI on CI, a clear GEI effect was observed for AFC and AFS across all environmental gradients examined. A reversal in genotype ranking occurred under extreme environmental conditions. The findings suggest that the best-performing genotype under one environmental gradient may not necessarily excel under another.-
Descrição: dc.descriptionStudent in the Graduate Program in Animal Science Federal University of Paraná (UFPR), Paraná-
Descrição: dc.descriptionDepartment of Animal and Dairy Sciences University of Wisconsin- Madison-
Descrição: dc.descriptionParaná Association of Holstein Cattle Breeders, Paraná-
Descrição: dc.descriptionPrincipal Research Scientist at the Commonwealth Scientific and Industrial Research Organization (CSIRO)-
Descrição: dc.descriptionSchool of Agricultural and Veterinarian Sciences Department of Animal Science São Paulo State University (UNESP), Via de Acesso Prof. Paulo Donato Castelane, SP-
Descrição: dc.descriptionDepartment of Animal Science Graduate Program in Animal Science UFPR, PR-
Descrição: dc.descriptionSchool of Agricultural and Veterinarian Sciences Department of Animal Science São Paulo State University (UNESP), Via de Acesso Prof. Paulo Donato Castelane, SP-
Idioma: dc.languageen-
Relação: dc.relationTropical Animal Health and Production-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAge at first calving-
Palavras-chave: dc.subjectCalving interval-
Palavras-chave: dc.subjectDairy cattle-
Palavras-chave: dc.subjectEnvironmental gradient-
Palavras-chave: dc.subjectEstimated breeding values-
Palavras-chave: dc.subjectReaction norms-
Título: dc.titleInfluence of different environmental challenges on the expression of reproductive traits in Holstein cattle in Southern Brazil-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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