Correlações genéticas entre escores visuais e características reprodutivas em bovinos Nelore usando inferência bayesiana

Boligon, Arione Augusti; Albuquerque, Lúcia Galvão de

doi:10.1590/s0100-204x2010001200011

Cited by 30 publications

(29 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In general, the finishing precocity score at yearling showed a low-magnitude heritability compared to that of studies using Nellore cattle and the restricted maximum likelihood method (Koury Filho et al, 2009) and Bayesian inference (Pires et al, 2010;Boligon and Albuquerque, 2010;Boligon et al, 2011). However, low heritability estimates for finishing precocity scores at yearling were observed in a study of Angus cattle that was carried out by Weber (2009b) using a different analysis method.…”

Section: Resultsmentioning

confidence: 87%

“…This score considers subcutaneous fat deposition and permits the evaluation of early or late finishing. In general, finishing precocity scores have medium to high heritability (Cardoso et al, 2001;Weber et al, 2009a;Boligon and Albuquerque, 2010), indicating the possibility of obtaining genetic gain by selection. Nonetheless, few studies have estimated the genetic correlations between the finishing precocity and other traits of interest.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Finishing precocity visual score and genetic associations with growth traits in Angus beef cattle

Everling¹,

Bresolin²,

Rorato³

et al. 2014

Genet. Mol. Res.

View full text Add to dashboard Cite

ABSTRACT. Finishing precocity visual score selection was adopted to estimate the time from birth to reach slaughter age. This study estimated (co)variance components and genetic correlations for the finishing precocity score at weaning (WP) and yearling (YP) stages by using daily weight gain (BWG = from birth to weaning; WYG = from weaning to yearling) and speed of weight gain (BWR = from birth to weaning; WYR = from weaning to yearling) as support for a genetic evaluation program for Angus beef cattle. Genetic parameters were estimated using Bayesian inference, considering multi-trait analysis and assuming a nonlinear model for WP and YP and linear model for The selection response for the finishing precocity score at weaning and yearling ages would be low. Selection to increase WP and YP should result in favorable genetic changes in daily weight gains as a correlated response. Therefore, to obtain animals suited for beef cattle production systems, finishing precocity score and growth traits should be considered as selection criteria.

show abstract

Section: Resultsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Finishing precocity visual score and genetic associations with growth traits in Angus beef cattle

Everling¹,

Bresolin²,

Rorato³

et al. 2014

Genet. Mol. Res.

View full text Add to dashboard Cite

show abstract

“…Higher heritability estimates were reported by Barichello et al (2010) in Canchim cattle for the same trait, which was assessed at weaning, and varied from 0.17 to 0.27. Heritability estimates for other visual score assessments in Nellore and Angus herds obtained at the weaning and yearling stages have ranged from 0.19 to 0.38 (Cardoso et al, 2004;Boligon and Albuquerque, 2010;Faria et al, 2009Faria et al, , 2010Koury Filho et al, 2010;Boligon et al, 2012;Wenceslau et al, 2012). These differences in heritability estimates could be caused by differences in the definition of visual assessment scores, the model applied to estimate the (co)variance components, as well as to differences in genetic and environmental variability between the populations or herds studied.…”

Section: Resultsmentioning

confidence: 99%

“…This would lead to a greater nutritional imbalance in heavy cows when forage supplies are scarce, and consequently the beginning of reproduction activity after first calving is delayed in these animals. Boligon and Albuquerque (2010) studied Nellore cattle, and estimated low genetic correlations between AFC and yearling scores of conformation (-0.26 ± 0.01), precocity (-0.29 ± 0.02), and muscling (-0.23 ± 0.02). Recently, Boligon et al (2012) obtained low and favorable genetic correlations between days to first calving and yearling scores of conformation, precocity, and muscling, which ranged from -0.11 ± 0.09 to -0.19 ± 0.09.…”

Section: Resultsmentioning

confidence: 99%

Genetic correlations between visual slaughter conformation scores and growth and reproductive traits in Canchim cattle

et al. 2016

View full text Add to dashboard Cite

ABSTRACT. We obtained heritability and (co)variance component estimates for slaughter conformation scores at 420 days of age (SCS 420 ), age at calving (first, AFC; second, ASC), calving occurrence until 38 months of age (CP 38 ), weight at 420 days of age (W 420 ), and scrotal circumference at 420 days (SC 420 ) in Canchim (5/8 Charolais + 3/8 Zebu) cattle. A total of 23,168 records of Canchim animals, including 12,493 females and 10,675 males, were analyzed. SCS 420 indicated carcass structure, muscle development, and subcutaneous fat deposition. The slaughter conformation score of each animal was relative to the whole contemporary group; 1 corresponded to the lowest expression of the trait and 6 to the highest. Heritabilities, and genetic and residual correlation estimates between SCS 420 and reproductive and weight traits, were estimated by multitrait analyses using an animal model with Bayesian inference, employing a linear model for AFC, ASC, SC420, and W420 and a threshold model for CP38 and SCS420. Heritability estimates for SCS 420 , AFC, ASC, CP 38 , W 420 , and SC 420 were 0.11, 0.15, 0.15, 0.15, 0.30, and 0.30, respectively. Genetic correlation estimates between SCS 420 and the other traits were 0.08 (AFC), 0.58 (ASC), 0.08 (CP 38 ), 0.43 (W 420 ), and 0.17 (SC 420 ). Visual slaughter conformation scores respond to individual selection and can be used as selection criteria in Canchim cattle. Selection to improve sexual precocity would not be effective in improving carcass conformation and composition, and selection for animals with high breeding values for yearling weight may improve slaughter conformation at the yearling stage.

show abstract

“…bras., Brasília, v.47, n.10, p. 1524-1532, out. 2012 2008; Boligon & Albuquerque, 2010;Koury Filho et al, 2010;Pires et al, 2010). Estas informações são importantes, pois permitem prever possíveis mudanças em uma característica, se a seleção for feita direcionada a outra.…”

Section: Introductionunclassified

Associação genética de escores de conformação com características de crescimento em bovinos da raça Angus

Everling

Rorato

Araújo

et al. 2012

Pesq. agropec. bras.

Self Cite

View full text Add to dashboard Cite

Resumo -O objetivo deste trabalho foi determinar a associação genética entre escores visuais de conformação e as características de ganho de peso médio diário e de velocidade de crescimento em bovinos da raça Angus à desmama e ao sobreano. Os componentes de covariância foram estimados por modelo animal de análise tetracaracterística, com uso do método de inferência bayesiana, tendo-se assumido o modelo linear para: ganho de peso médio diário do nascimento à desmama (GMD) e da desmama ao sobreano (GMS); e velocidade de ganho de peso do nascimento à desmama (VD) e da desmama ao sobreano (VS). Um modelo não linear (de limiar) foi utilizado para os escores de conformação à desmama (CD) e ao sobreano (CS). As médias a posteriori, para a herdabilidade direta, foram: 0,12±0,023 (CD), 0,15±0,020 (GMD), 0,15±0,024 (VD), 0,17±0,020 (CS), 0,17±0,023(GMS), e 0,17±0,023 (VS). A correlação genética variou de -0,09±0,11 a 0,60±0,06, entre os escores CD e CS e as características de ganho médio diário de peso e velocidade de ganho de peso. A correlação entre CD e CS foi 0,52±0,089. A seleção direta para escores visuais de conformação, ganho médio diário e velocidade de ganho responde de forma lenta à seleção, tanto à desmama como ao sobreano.Termos para indexação: amostrador de Gibbs, componentes de variância, gado de corte, inferência bayesiana. Genetic association of conformation scores with growth traits in Angus breed cattleAbstract -The objective of this work was determine the genetic association between visual scores of conformation and the traits of daily average weight gain and weight gain rate in Angus breed cattle at weaning and yearling. The components of covariance were estimated by a multitrait animal model using the Bayesian inference method, assuming a linear model for: daily average weight gain from birth to weaning (BWG) and from weaning to yearling (WYG); and weight gain rate from birth to weaning (BWR) and from weaning to yearling (WYR). A nonlinear model (threshold) was used for conformation scores at weaning (WC) and at yearling (YC). The a posteriori means for heritability were: 0.12±0.023 (WC), 0.15±0.020 (BWG), 0.15±0.024 (BWR), 0.17±0.020 (YC), 0.17±0.023 (WYG) and 0.17±0,023 (WYR). The genetic correlations ranged from -0.09±0.11 to 0.60±0.06, between WC, YC, and the daily average weight gain and weight gain rate. The correlation between WC and YC was 0.52±0.089. The direct selection for visual scores of conformation, average daily gain and weight gain rate respond slowly to selection, both at weaning and yearling.

show abstract

Correlações genéticas entre escores visuais e características reprodutivas em bovinos Nelore usando inferência bayesiana

Cited by 30 publications

References 16 publications

Finishing precocity visual score and genetic associations with growth traits in Angus beef cattle

Finishing precocity visual score and genetic associations with growth traits in Angus beef cattle

Genetic correlations between visual slaughter conformation scores and growth and reproductive traits in Canchim cattle

Associação genética de escores de conformação com características de crescimento em bovinos da raça Angus

Contact Info

Product

Resources

About