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dc.contributor.authorSavegnago, R. P.-
dc.contributor.authorBuzanskas, M. E.-
dc.contributor.authorNunes, B. N.-
dc.contributor.authorRamos, S. B.-
dc.contributor.authorLedur, M. C.-
dc.contributor.authorNones, K.-
dc.contributor.authorMunari, D. P.-
dc.identifier.citationGenetics and Molecular Research. Ribeirao Preto: Funpec-editora, v. 10, n. 3, p. 1337-1344, 2011.-
dc.description.abstractStudies estimating genetic parameters for reproductive traits in chickens can be useful for understanding and improvement of their genetic architecture. A total of 1276 observations of fertility (FERT), hatchability of fertile eggs (HFE) and hatchability of total eggs (HTE) were used to estimate the genetic and phenotypic parameters of 467 females from an F2 population generated by reciprocal crossing between a broiler line and a layer line, which were developed through a poultry genetics breeding program, maintained by Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Swine and Poultry, Concordia, Santa Catarina, Brazil. Estimates of heritability and genetic and phenotypic correlations were obtained using restricted maximum likelihood calculations under the two-trait animal model, including the fixed effect of group (hatching of birds from the same genetic group) and the random additive genetic and residual effects. The mean percentages for FERT, HFE and HTE were 87.91 +/- 19.77, 80.07 +/- 26.81 and 70.67 +/- 28.55%, respectively. The highest heritability estimate (h(2)) was 0.28 +/- 0.04 for HTE. Genetic correlations for FERT with HFE (0.43 +/- 0.17), HFE with HTE (0.98 +/- 0.02) and FERT with HTE (0.69 +/- 0.10) were positive and significant. Individuals with high breeding value for HTE would have high breeding values for HFE and FERT because of the high genetic association between them. These results suggest that HTE should be included as a selection criterion in genetic breeding programs to improve the reproductive performance of chickens, because HTE had the highest heritability estimate and high genetic correlation with FERT and HFE, and it is the easiest to measure.en
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
dc.description.sponsorshipEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)-
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
dc.sourceWeb of Science-
dc.subjectGenetic associationen
dc.subjectWhite Leghornen
dc.titleHeritabilities and genetic correlations for reproductive traits in an F2 reciprocal cross chicken populationen
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)-
dc.contributor.institutionUniversidade de São Paulo (USP)-
dc.description.affiliationUniv Estadual Paulista, Dept Ciencias Exatas, Fac Ciencias Agr & Vet, Jaboticabal, SP, Brazil-
dc.description.affiliationEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Suinos & Aves, Concordia, SC, Brazil-
dc.description.affiliationUniv São Paulo, Escola Super Agr Luiz de Queiroz, Lab Biotecnol Anim, Piracicaba, SP, Brazil-
dc.description.affiliationUnespUniv Estadual Paulista, Dept Ciencias Exatas, Fac Ciencias Agr & Vet, Jaboticabal, SP, Brazil-
dc.rights.accessRightsAcesso aberto-
dc.relation.ispartofGenetics and Molecular Research-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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