Estimativas de parâmetros e tendências genéticas para algumas características de importância econômica em linhagem paterna de frangos de corte sob seleção

Vayego, Stela Adami; Dionello, Nelson José Laurino; Figueiredo, E. A. P. de

doi:10.1590/s1516-35982008000700013

Cited by 9 publications

(6 citation statements)

References 7 publications

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“…The experimental research center is located in the city of Concórdia (27º 14' 03" S -52º 01' 40" W), Santa Catarina state, Brazil. This line of broilers has been under development since 1992 and aims to: increase body weight and carcass yield, improve viability, fertility, hatchability, and feed conversion, and reduce abdominal fat and metabolic problems (Vayego et al 2008). The original population was randomly sampled and then 20 males and 100 females were mated to produce an initial population of approximately 1,500 animals.…”

Section: Population and The Collection Of Datamentioning

confidence: 99%

“…The global changes in eating habits during the last decades with a strong preference for chicken cuts and processed meat have encouraged the industry to adapt to the poultry industry level, providing specifi c lineages of meat production. Consequently, it is possible to obtain genotypes with higher performance for local environmental conditions (Vayego et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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Genetic parameters for performance and carcass traits in a paternal 1 lineage of broiler

Cruz

Grupioni

Mendonça

et al. 2020

An. Acad. Bras. Ciênc.

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Section: Population and The Collection Of Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Genetic parameters for performance and carcass traits in a paternal 1 lineage of broiler

Cruz

Grupioni

Mendonça

et al. 2020

An. Acad. Bras. Ciênc.

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“…Besides, there are very few studies of genetic trends in chickens described in the literature (Le Bihan-Durval et al, 1998;Costa et al, 2005;Rezende et al, 2005;Gaya et al, 2005bGaya et al, , 2007Mourão et al, 2008;Vayego et al, 2008), which makes it even more important to measure these parameters.…”

Section: Introductionmentioning

confidence: 99%

Estimates of genetic trend for carcass traits in a commercial broiler line

Grosso

Balieiro²,

Eler³

et al. 2009

Genet. Mol. Res.

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ABSTRACT. Data from the slaughter of 24,001 chickens that were part of a selection program for the production of commercial broilers were used to estimate genetic trend for absolute carcass (CW), breast meat (BRW), and leg (LW) weights, and relative carcass (CY), breast meat (BRY), and leg (LY) weights. The components of (co)variance and breeding values of individuals were obtained by the restricted maximum likelihood method applied to animal models. The relationship matrix was composed of 132,442 birds. The models included as random effects, maternal additive genetic and permanent environmental for CW, BRW, LW, CY, and BRY, and only maternal permanent environmental for LY, besides the direct additive genetic and residual effects, and as fixed effects, hatch week, parents' mating group and sex. The estimates of genetic trend were obtained by average regression of breeding value on generation, and the average genetic trend was estimated by regression coefficients. The genetic trends for CW (+6.0336 g/generation), BRW (+3.6723 g/generation), LW (+1.5846 g/generation), CY (+0.1195%/ generation), and BRY (+0.1388%/generation) were positive, and they were in accordance with the objectives of the selection program for these traits. The genetic trend for LY (-0.0019%/generation) was negative, possibly due to the strong emphasis on selection for BRY and the negative correlations between these two traits.

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“…Thus, the meat industry like animals with high weights at slaughter and better carcass traits. Genetic relations for some growth and carcass traits have been previously studied (Le BIHAN-DUVAL et al, 1998;Le BIHAN-DUVAL et al, 2001;RANCE et al, 2002;ZEREHDARAN et al, 2004;GAYA et al, 2006;VAYEGO et al, 2008;GROSSO et al, 2009). Although these studies had considered the carcass traits, the genetic relation between carcass traits with body weights were not analyzed, these may limit our understanding on how the animal performance affects carcass traits.…”

Section: Introductionmentioning

confidence: 99%

Correlated responses and genetic parameters for performance and carcass traits in a broiler line

Pértile

Zampar

Petrini

et al. 2014

Rev. bras. saúde prod. anim.

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The growth rate of broilers has triplicated in the last decades. The body weight is used as one of the selection criteria whereas the carcass traits are valuable market requirements. Thus, the meat industry like animals with high weights at slaughter and better carcass traits. However, the genetic relation of carcass traits with several body weights is unknown. Therefore, we established genetic associations among performance and carcass traits in a broiler chicken line and estimated genetic gain and trends. We also evaluated what age of selection would lead to a more efficient indirect selection of carcass traits. The data set with information of weights in different ages and carcass traits of 128,459 chickens was used. The pedigree data used contained 132,442 chickens. Genetic analysis were realized using ASREML® software applied a restricted maximum likelihood method. Heritability estimates ranged from moderate to high, which indicates that these traits can have high selection response. Genetic correlations between performance and carcass traits varied from moderate to high, which indicates the presence of a genetic association whereas genetic trends indicated that direct selection is occurring for body weight at different ages. Theselection at 30 and 38 days should be considered instead of the slaughter weight, as it anticipates selection in around 12 days.

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Estimativas de parâmetros e tendências genéticas para algumas características de importância econômica em linhagem paterna de frangos de corte sob seleção

Cited by 9 publications

References 7 publications

Genetic parameters for performance and carcass traits in a paternal 1 lineage of broiler

Genetic parameters for performance and carcass traits in a paternal 1 lineage of broiler

Estimates of genetic trend for carcass traits in a commercial broiler line

Correlated responses and genetic parameters for performance and carcass traits in a broiler line

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