Heritability and Genetic Correlation Estimates for Performance and Carcass and Body Composition Traits in a Male Broiler Line

Gaya, Leila de Genova; Ferraz, José Bento Sterman; Rezende, Fernanda Marcondes de; Mourão, Gérson Barreto; Mattos, E. C.; Eler, Joanir Pereira; Filho, Tercio Michelan

doi:10.1093/ps/85.5.837

Cited by 112 publications

(170 citation statements)

References 17 publications

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“…Heritabilities for C P , B w , L w , AF w traits were estimated at moderate-high levels to be 0.42, 0.36, 0.34 and 0.40, respectively. Heritability estimates of eviscerated and carcass weights of poultry were reported as generally moderate and high by various researchers (Toelle et al, 1991;Gaya et al, 2006). Heritability estimates of C P , B P , L P , AF P traits were estimated as low-moderate, viz.…”

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confidence: 99%

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Estimation of genetic parameters for carcass traits in Japanese quail using Bayesian methods

Narinç¹,

Karaman²,

Aksoy³

2011

SA J. An. Sci.

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The aim of this study was to estimate genetic parameters of some carcass characteristics in the Japanese quail. For this aim, carcass weight (C w ), breast weight (B w ), leg weight (L w ), abdominal fat weight (AF w ), carcass yield (C P ), breast percentage (B P ), leg percentage (L P ) and abdominal fat percentage (AF P ) were measured on approximately 500 quails (offspring of 60 sires and 180 dams). Gibbs sampling (GS) under a multi-trait animal model was applied to estimate heritability and genetic correlations. Genetic analyses were performed using MTGSAM (Multiple Trait Gibbs Sampling) software. Heritability estimates for all the traits were low to moderate. Point estimates (means of marginal posterior densities) of heritabilities for C w , B w , L w , AF w and C P , B P , L P , AF P were 0. 42, 0.36, 0.34, 0.40 and 0.11, 0.18, 0.12, 0.29, respectively. Genetic correlations between the carcass parts (C w , B w , L w , AF w ) were high and positive, ranging from 0.65 to 0.87. Direct selection for total carcass weight would increase its component traits. There were moderate to high negative genetic relationships between AF P and L P (-0.27), AF P and B P (-0.34), and AF P and C P (-0.89). Therefore, a decreasing AF P in quail could be reached by direct selection for higher C P .________________________________________________________________________________

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confidence: 99%

“…Toelle et al (1991) determined a high genetic correlation between eviscerated weight and breast weight, and similarly, Vali et al (2005) reported high genetic correlations between eviscerated weight and leg weight. Additionally, there is a rather high genetic correlation between abdominal fat and carcass yield in poultry (Gaya et al, 2006).…”

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confidence: 99%

Estimation of genetic parameters for carcass traits in Japanese quail using Bayesian methods

Narinç¹,

Karaman²,

Aksoy³

2011

SA J. An. Sci.

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“…No entanto, em frangos, os resultados encontrados por Wang et al (1991), Argentão et al (2002) e Gaya et al (2006) indicam forte associação entre o peso vivo e o peso de carcaça, variando de 0,85 a 0,97.…”

Section: Resultsunclassified

Estimação pelo método Bayesiano de parâmetros genéticos de peso vivo e características de carcaça em avestruzes

Rosa¹,

Almeida

Rigoti

et al. 2011

R. Bras. Zootec.

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RESUMO -Com o objetivo de estimar parâmetros genéticos de características de desempenho e carcaça de avestruzes criados comercialmente, foi utilizado o método Bayesiano, por meio do algoritmo amostrador de Gibbs, disponível no programa MTGSAM (Multiple Trait Gibbs Sampling for Animal Models). Foram estimadas as herdabilidades e correlações genéticas para: peso vivo ao nascer (PN); peso vivo corrigido aos 190 dias (P190) e aos 360 dias (P360) de idade; peso vivo pré-abate (PVO); perda de peso durante o transporte e jejum (PTA); peso de carcaça (PCA); e rendimento de carcaça (RCA). As herdabilidades respectivas foram 0,11; 0,12; 0,33; 0,05; 0,04; 0,20; 0,05. Para as correlações, foram encontrados os valores de -0,11 entre rendimento de carcaça e peso ao nascer; 0,84 e 0,68 para peso de carcaça com peso aos 190 dias e peso de carcaça com peso aos 360 dias; 0,61 e 0,33 para rendimento de carcaça com peso aos 190 dias e rendimento de carcaça com peso aos 360 dias.Não é viável selecionar para peso ao nascer ou para rendimento de carcaça como é para peso aos 360 dias de idade e peso de carcaça. A seleção para peso aos 360 dias de idade pode melhorar o peso da carcaça, ao passo que a seleção para peso aos 190 dias pode aumentar o rendimento de carcaça. 11, 0.12, 0.33, 0.05, 0.04, 0.20, 0.05. For the correlations, it was found values of -0.11 between carcass dressing and birth live weight, 0.84 and 0.64 for carcass weight with weight at 190 days of age and carcass weight with weight at 360 days. Selection for birth weight or for carcass dressing is not feasible as it is for weight at 360 days of age and carcass weight. The selection for weight at 360 days of age can improve carcass weight whereas selection for weight at 190 days can increase carcass dressing.

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“…For slaughter weight in chicken, heritability coefficients between 0.24 and 0.37 have been reported (Le Bihan-Duval et al, 1999;Gaya et al, 2006;Vayego et al, 2008). These values indicate that the individual pre-selection for any of these traits could lead to a good response in the selection, since they have additive genetic components in their expression.…”

Section: ----------------------------------------------------Eigenvecmentioning

confidence: 99%

“…US presents moderate to high heritability, as Gaya et al (2006) reported heritability coefficients of 0.28 and 0.29 for the depth of breast muscle measured by ultrasonography. For slaughter weight in chicken, heritability coefficients between 0.24 and 0.37 have been reported (Le Bihan-Duval et al, 1999;Gaya et al, 2006;Vayego et al, 2008).…”

Section: ----------------------------------------------------Eigenvecmentioning

confidence: 99%

Production and body composition traits of broilers in relation to breast weight evaluated by path analysis

Lorentz

Gaya

Lunedo

et al. 2011

Sci. agric. (Piracicaba, Braz.)

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Breast weight has great economic importance in poultry industry, and may be associated with other variables. This work aimed to estimate phenotypic correlations between performance (live body weight at 7 and 28 days, and at slaughter, and depth of the breast muscle measured by ultrasonography), carcass (eviscerated body weight and leg weight) and body composition (heart, liver and abdominal fat weight) traits in a broiler line, and quantify the direct and indirect influence of these traits on breast weight. Path analysis was used by expanding the matrix of partial correlation in coefficients which give the direct influence of one trait on another, regardless the effect of the other traits. The simultaneous maintenance of live body weight at slaughter and eviscerated body weight in the matrix of correlations might be harmful for statistical analysis involving systems of normal equations, like path analysis, due to the observed multicollinearity. The live body weight at slaughter and the depth of the breast muscle as measured by ultrasonography directly affected breast weight and were identified as the most responsible factors for the magnitude of the correlation coefficients obtained between the studied traits and breast weight. Individual pre-selection for these traits could favor an increased breast weight in the future reproducer candidates of this line if the broilers' environmental conditions and housing are maintained, since the live body weight at slaughter and the depth of breast muscle measured by ultrasonography were directly related to breast weight. Key words: animal breeding, multivariate analysis, phenotypic correlation, poultry, pre-selection Características de produção e de composição corporal de frangos em relação ao peso de peito avaliada por análise de trilha RESUMO: O peso do peito possui grande importância econômica na indústria de frangos, podendo estar associado a outras variáveis passíveis de seleção. Estimaram-se correlações fenotípicas entre características de desempenho (peso vivo aos 7, 28 dias e ao abate e profundidade de músculo peitoral por ultra-sonografia), carcaça (peso eviscerado e de pernas) e composição corporal (peso do coração, do fígado e da gordura abdominal), em uma linhagem de frangos, e quantificou-se a influência direta e indireta destas variáveis sobre o peso do peito. Para tanto, utilizou-se a análise de trilha, desdobrando-se a matriz de correlações parciais em coeficientes que forneceram a influência direta de uma variável sobre a outra, independentemente das demais. A manutenção das variáveis peso vivo ao abate e peso eviscerado na matriz de correlações pode ser prejudicial à análise estatística que envolve os sistemas de equações normais, como a análise de trilha, devido à multicolinearidade observada. O peso vivo ao abate e a profundidade do músculo peitoral por ultra-sonografia apresentaram efeitos diretos importantes sobre o peso de peito e foram identificadas como as principais responsáveis pela magnitude dos coeficientes de correlação obtidos. Assi...

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Heritability and Genetic Correlation Estimates for Performance and Carcass and Body Composition Traits in a Male Broiler Line

Cited by 112 publications

References 17 publications

Estimation of genetic parameters for carcass traits in Japanese quail using Bayesian methods

Estimation of genetic parameters for carcass traits in Japanese quail using Bayesian methods

Estimação pelo método Bayesiano de parâmetros genéticos de peso vivo e características de carcaça em avestruzes

Production and body composition traits of broilers in relation to breast weight evaluated by path analysis

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