Relationship between age, scrotal circumference, postweaning weight and semen quality in Nellore and Caracu bulls: a cross sectional study

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorInstitute of Animal Science (IZ)-
Autor(es): dc.creatorPagoto, Jaine Martelo-
Autor(es): dc.creatorBenfica, Lorena Ferreira-
Autor(es): dc.creatorBorges, Marcelo Sant’Ana-
Autor(es): dc.creatorLigori, Viviane Andrade-
Autor(es): dc.creatorCanesin, Roberta Carrilho-
Autor(es): dc.creatorMercadante, Maria Eugênia Zerlotti-
Autor(es): dc.creatorMonteiro, Fabio Morato-
Data de aceite: dc.date.accessioned2025-08-21T16:25:30Z-
Data de disponibilização: dc.date.available2025-08-21T16:25:30Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2023-11-30-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s11250-023-03818-7-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/300754-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/300754-
Descrição: dc.descriptionThe aim of this study was to investigate the relationship between age, scrotal circumference, postweaning weight and semen quality in Nellore and Caracu bulls selected for postweaning weight. Data from the andrological evaluation of 836 bulls born between 2000 and 2019, including 583 Nellore animals (Bos indicus) and 253 Caracu animals (Bos taurus), were used. The bulls were divided into categories of age at the time of assessment: category 1 consisted of animals aged 20 to 23 months (22 ± 0.76 months, 518 ± 94.17 kg), category 2 consisted of animals aged 24 to 35 months (30 ± 4.42 months, 679 ± 137.19 kg), and category 3 consisted of animals ≥ 36 months (60 ± 14.12 months, 907 ± 161.73 kg). The statistical model included the effects of breed, age category, date of semen collection, and breed x age category interaction. Heritability estimates for scrotal circumference at 13 months of age (SC1year) and semen quality traits were obtained for the sample of Nellore animals. Most semen quality traits improved with increasing age in both Nellore and Caracu animals. High heritability was observed for SC1year (0.45), while sperm motility, vigor, turbulence, and major, minor and total sperm defects exhibited low heritability (0.11, 0.019, 0.047, 0.017, 0.017 and 0.019, respectively). Spearman correlations of breeding values for postweaning weight (W378) and SC1year with the semen quality traits were low. Nellore and Caracu bulls have similar semen quality that improves with increasing age. In the Nellore breed, the heritability of SC is high, while semen quality traits exhibit low heritability. Selection for higher postweaning weight does not phenotypically affect the semen quality of bulls at breeding age.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionDepartment of Pathology Reproduction and One Health School of Agricultural and Veterinarian Sciences São Paulo State University, Via de Acesso Professor Paulo Donato Castelane – Vila Industrial, SP-
Descrição: dc.descriptionBeef Cattle Research Center Institute of Animal Science (IZ), Road Carlos Tonani, 94 – Zona Industrial, São Paulo-
Descrição: dc.descriptionDepartment of Pathology Reproduction and One Health School of Agricultural and Veterinarian Sciences São Paulo State University, Via de Acesso Professor Paulo Donato Castelane – Vila Industrial, SP-
Descrição: dc.descriptionCAPES: 001-
Descrição: dc.descriptionFAPESP: 2017/50339-5-
Idioma: dc.languageen-
Relação: dc.relationTropical Animal Health and Production-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAndrological traits-
Palavras-chave: dc.subjectBreeding values-
Palavras-chave: dc.subjectBull-
Palavras-chave: dc.subjectHeritability-
Palavras-chave: dc.subjectWeight-
Título: dc.titleRelationship between age, scrotal circumference, postweaning weight and semen quality in Nellore and Caracu bulls: a cross sectional study-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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