Heritability estimates for heart and liver visual scores in a male broiler line

The objective of this study was to estimate the heritability coefficients for heart and liver visual scores in a male broiler line. Dataset analysis was realized by restricted maximum likelihood and by R method. Data from 6167 individuals were used. Heart and liver visual scores did not seem to be a...

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Published inBrazilian journal of veterinary research and animal science Vol. 43; no. 6; pp. 734 - 738
Main Authors Leila de Genova Gaya, Gerson Barreto Mourão, Josineudson Augusto II de Vasconcelos Silva, Fernanda Marcondes de Rezende, Elisângela Chicaroni de Mattos, Luís Gustavo Girardi Figueiredo, José Bento Sterman Ferraz, Tércio Michelan Filho, Joanir Pereira Eler
Format Journal Article
LanguagePortuguese
Published Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia 01.01.2006
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Abstract The objective of this study was to estimate the heritability coefficients for heart and liver visual scores in a male broiler line. Dataset analysis was realized by restricted maximum likelihood and by R method. Data from 6167 individuals were used. Heart and liver visual scores did not seem to be able to respond to selection, since the heritability estimates obtained by restricted maximum likelihood were 0,05±0,02 for both traits. Possibly due to the low variability of visual scores data, the analyses by R method did not converge. O objetivo deste estudo foi estimar os coeficientes de herdabilidade para os escores visuais de coração e de fígado em uma linhagem macho de frangos de corte. As análises dos dados foram realizadas através do método da máxima verossimilhança restrita e do método R, utilizando-se informações de 6167 animais. Os escores visuais de coração e de fígado não pareceram ser capazes de apresentar resposta à seleção, tendo em vista as estimativas de herdabilidade obtidas através do método da máxima verossimilhança restrita, que foram de 0,05±0,02 para ambas as características. Possivelmente devido à pouca variabilidade dos dados dos escores visuais de coração e de fígado, as análises realizadas pelo método R não atingiram convergência.
AbstractList The objective of this study was to estimate the heritability coefficients for heart and liver visual scores in a male broiler line. Dataset analysis was realized by restricted maximum likelihood and by R method. Data from 6167 individuals were used. Heart and liver visual scores did not seem to be able to respond to selection, since the heritability estimates obtained by restricted maximum likelihood were 0,05±0,02 for both traits. Possibly due to the low variability of visual scores data, the analyses by R method did not converge. O objetivo deste estudo foi estimar os coeficientes de herdabilidade para os escores visuais de coração e de fígado em uma linhagem macho de frangos de corte. As análises dos dados foram realizadas através do método da máxima verossimilhança restrita e do método R, utilizando-se informações de 6167 animais. Os escores visuais de coração e de fígado não pareceram ser capazes de apresentar resposta à seleção, tendo em vista as estimativas de herdabilidade obtidas através do método da máxima verossimilhança restrita, que foram de 0,05±0,02 para ambas as características. Possivelmente devido à pouca variabilidade dos dados dos escores visuais de coração e de fígado, as análises realizadas pelo método R não atingiram convergência.
Author Elisângela Chicaroni de Mattos
Josineudson Augusto II de Vasconcelos Silva
José Bento Sterman Ferraz
Joanir Pereira Eler
Tércio Michelan Filho
Gerson Barreto Mourão
Fernanda Marcondes de Rezende
Luís Gustavo Girardi Figueiredo
Leila de Genova Gaya
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  fullname: Fernanda Marcondes de Rezende
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  fullname: Elisângela Chicaroni de Mattos
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  fullname: Luís Gustavo Girardi Figueiredo
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  fullname: José Bento Sterman Ferraz
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  fullname: Tércio Michelan Filho
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  fullname: Joanir Pereira Eler
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Snippet The objective of this study was to estimate the heritability coefficients for heart and liver visual scores in a male broiler line. Dataset analysis was...
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Frangos de Corte
Melhoramento Genético
Parâmetros Genéticos
Title Heritability estimates for heart and liver visual scores in a male broiler line
Volume 43
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