Effect of sires’ expected progeny difference for scrotal circumference and juvenile ADG on the puberty of crossbred beef heifers

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dc.contributor.authorBarroso, José Paulo Roman
dc.contributor.authorde Castro Ferraz Junior, Marcos Vinicius
dc.contributor.authorOliveira, Gabriela Bagio
dc.contributor.authorMiszura, Alexandre Arantes
dc.contributor.authorBertoloni, Analisa Vasques
dc.contributor.authorMartins, André Storti
dc.contributor.authorBaggio, Marcelo
dc.contributor.authorPolizel, Daniel Montanher [UNESP]
dc.contributor.authorBiava, Janaina Socolovski [UNESP]
dc.contributor.authorFerreira, Evandro Maia
dc.contributor.authorPires, Alexandre Vaz
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Federal do Amazonas (UFAM)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2023-07-29T14:02:10Z
dc.date.available2023-07-29T14:02:10Z
dc.date.issued2023-06-01
dc.description.abstractThe early attainment of puberty in heifers is essential for the profitability of the cow-calf farm. This study aimed to evaluate the impact of juvenile average daily gain (ADG) and sire’s expected progeny difference (EPD) on puberty of crossbred beef heifers. Sixty Angus × Nellore heifers early weaned (age = 102 ± 4.3 d; initial BW = 103 ± 4.7 kg) were used in a 2 × 2 factorial arrangement. The factor 1 was the sire’s EPD for scrotal circumference, in which heifers born from sires with positive EPD were considered precocious (P), and heifers born from sires with negative EPD were considered non-precocious (NP). The factor 2 was the high (HG; ADG = 0.9 kg; ad libitum) and medium ADG (MG; ADG = 0.7 kg) from 3rd to 7th month of age (1st phase). After 1st phase until puberty, all heifers were fed ad libitum (2nd phase). Statistical analysis was performed by SAS. There was an interaction between factors for DMI in the 1st phase (P = 0.02), which PHG heifers had higher DMI than NPHG. There was no effect on puberty rate, BW, age and BCS at puberty comparing HG vs. MG. However, favorable sires’ EPD for scrotal circumference induced a higher proportion of puberty (P 87% vs. NP 59%) at 15 months of age. Thus, the ADG in juvenile age did not affect puberty rate, but sires with positive EPD increased puberty rate of Angus × Nellore heifers in heifers fed a high gain diet.en
dc.description.affiliationDepartamento de Nutrição e Produção Animal Faculdade de Medicina Veterinária e Zootecnia (FMVZ/USP) Universidade de São Paulo, SP
dc.description.affiliationInstituto de Ciências Sociais Educação e Zootecnia (ICSEZ)) Universidade Federal do Amazonas (UFAM), AM
dc.description.affiliationFaculdade de Zootecnia e Engenharia de Alimentos Universidade de São Paulo, SP
dc.description.affiliationDepartamento de Biologia e Zootecnia Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), SP
dc.description.affiliationFaculdade de Medicina Veterinária e Zootecnia Universidade Estadual Paulista “Júlio de Mesquita Filho” (FMVZ/Unesp), SP
dc.description.affiliationDepartamento de Zootecnia Escola Superior de Agricultura “Luiz de Queiroz” (ESALQ/USP) Universidade de São Paulo, SP
dc.description.affiliationUnespDepartamento de Biologia e Zootecnia Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), SP
dc.description.affiliationUnespFaculdade de Medicina Veterinária e Zootecnia Universidade Estadual Paulista “Júlio de Mesquita Filho” (FMVZ/Unesp), SP
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.identifierhttp://dx.doi.org/10.1007/s11250-023-03600-9
dc.identifier.citationTropical Animal Health and Production, v. 55, n. 3, 2023.
dc.identifier.doi10.1007/s11250-023-03600-9
dc.identifier.issn1573-7438
dc.identifier.issn0049-4747
dc.identifier.scopus2-s2.0-85160588905
dc.identifier.urihttp://hdl.handle.net/11449/249092
dc.language.isoeng
dc.relation.ispartofTropical Animal Health and Production
dc.sourceScopus
dc.subjectCompensatory growth
dc.subjectIGF-1
dc.subjectInsulin
dc.subjectPuberty rate
dc.subjectSexual precocity
dc.titleEffect of sires’ expected progeny difference for scrotal circumference and juvenile ADG on the puberty of crossbred beef heifersen
dc.typeArtigo
unesp.author.orcid0000-0002-6041-2539[2]

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