Maternal effects on the genetic evaluation of Tabapuã beef cattle

Campêlo, José Elivalto Guimarães; Lopes, Paulo Sávio; Torres, Robledo de Almeida; Silva, Luiz Otávio Campos da; Euclydes, Ricardo Frederico; Araújo, Cláudio Vieira de; Pereira, Cláubia

doi:10.1590/s1415-47572004000400009

Cited by 11 publications

(13 citation statements)

References 10 publications

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“…Direct-maternal additive genetic correlations estimates for W120, W240, W360 and W480 (Table 5) were, in general, similar in magnitude to those reported by Ferraz Filho et al (2002) and Campêlo et al (2004), who found estimates between -0.20 and -0.40. Costa et al (2011) reported higher estimates: -0.74 and -0.68 for weaning and yearling weights, respectively.…”

Section: Resultssupporting

confidence: 86%

“…Yet Costa et al (2011) reported h 2 m close to 0.25 and 0.13 for weaning and yearling weight, respectively. A decrease in h 2 m for weights at advanced ages was found, agreeing with Ferraz Filho et al (2002), Campêlo et al (2004), Baldi Rey (2008) and Costa et al (2011). Although of low magnitude, greater selection response for maternal ability in Tabapuã herds can be achieved by selecting on weights near the weaning period (240 days).…”

Section: Resultssupporting

confidence: 82%

“…Both cited authors worked with Tabapuã cattle, but the first ones applied a single trait model while the last ones applied a two-trait model. Direct heritability estimates (h 2 ) were higher than those reported by Ferraz Filho et al (2002) and lower than those reported by Campêlo et al (2004) (Table 3). Boligon (2008), Baldi Rey (2008) and Costa et al (2011), who worked, respectively, with Nellore, Canchim and Angus breeds, reported, using a multi-trait model, higher h 2 than this study (>0.25) for weaning and yearling weights.…”

Section: Resultscontrasting

confidence: 58%

“…Maternal heritability estimates (h 2 m ) were lower than those found by Campêlo et al (2004), who reported h 2 m equal to 0.13 and 0.17 for W120 and W240, respectively (Table 3). Baldi Rey (2008) reported lower h 2 m than those found in this study, 0.03 and 0.02 for weaning and yearling weights, respectively.…”

Section: Resultsmentioning

confidence: 54%

“…Overall, (co)variance component estimates (Table 2) were higher than those reported by Ferraz Filho et al (2002) and lower than those reported by Campêlo et al (2004). Both cited authors worked with Tabapuã cattle, but the first ones applied a single trait model while the last ones applied a two-trait model.…”

Section: Resultsmentioning

confidence: 56%

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Estimation of genetic parameters for growth traits in Tabapuã cattle using a multi-trait model

Menezes

Torres²,

Júnior

et al. 2013

R. Bras. Zootec.

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-To provide information that can contribute to the genetic evaluation and selection in Tabapuã cattle, genetic parameters were estimated for growth traits using a multi-trait animal model. (Co)variance components were estimated by a Bayesian approach using the Gibbs Sampler. Moderate and similar responses to selection are expected when selecting for weights at the four ages evaluated, since the direct heritability estimates were similar and of average magnitude (0.18 to 0.19). The direct and maternal additive genetic correlations between all pairs of weights were higher than 0.70, indicating a high degree of association between the four traits. This suggests that using any of them as selection criteria will result in correlated response in the others and that multi-trait analysis are recommended for the genetic evaluation of growth traits in beef cattle for exploiting this association.

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Section: Resultssupporting

confidence: 86%

Section: Resultssupporting

confidence: 82%

Section: Resultscontrasting

confidence: 58%

Section: Resultsmentioning

confidence: 54%

Section: Resultsmentioning

confidence: 56%

See 3 more Smart Citations

Estimation of genetic parameters for growth traits in Tabapuã cattle using a multi-trait model

Menezes

Torres²,

Júnior

et al. 2013

R. Bras. Zootec.

Self Cite

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Genetic parameter estimation for pre- and post-weaning traits in Brahman cattle in Brazil

Vargas

Buzanskas

Guidolin

et al. 2014

Trop Anim Health Prod

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Beef cattle producers in Brazil use body weight traits as breeding program selection criteria due to their great economic importance. The objectives of this study were to evaluate different animal models, estimate genetic parameters, and define the most fitting model for Brahman cattle body weight standardized at 120 (BW120), 210 (BW210), 365 (BW365), 450 (BW450), and 550 (BW550) days of age. To estimate genetic parameters, single-, two-, and multi-trait analyses were performed using the animal model. The likelihood ratio test was verified between all models. For BW120 and BW210, additive direct genetic, maternal genetic, maternal permanent environment, and residual effects were considered, while for BW365 and BW450, additive direct genetic, maternal genetic, and residual effects were considered. Finally, for BW550, additive direct genetic and residual effects were considered. Estimates of direct heritability for BW120 were similar in all analyses; however, for the other traits, multi-trait analysis resulted in higher estimates. The maternal heritability and proportion of maternal permanent environmental variance to total variance were minimal in multi-trait analyses. Genetic, environmental, and phenotypic correlations were of high magnitude between all traits. Multi-trait analyses would aid in the parameter estimation for body weight at older ages because they are usually affected by a lower number of animals with phenotypic information due to culling and mortality.

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No Correlation Between Inbreeding Depression and Delayed Selfing in the Freshwater Snail Physa Acuta

et al. 2007

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Inbreeding depression, one of the main factors driving mating system evolution, can itself evolve as a function of the mating system (the genetic purging hypothesis). Classical models of coevolution between mating system and inbreeding depression predict negative associations between inbreeding depression and selfing rate, but more recent approaches suggest that negative correlations should usually be too weak or transient to be detected within populations. Empirical results remain unclear and restricted to plants. Here, we evaluate, for the first time, the within-population genetic correlation between inbreeding depression and a trait that controls the amount of self-fertilization (the waiting time) in a self-fertile hermaphroditic animal, the freshwater snail Physa acuta. Using a large quantitative-genetic design (36 grand-families and 348 families), we observe abundant withinpopulation family-level genetic variation for both inbreeding depression (estimated for survival, fecundity, and size) and the degree of behavioral selfing avoidance. However, we detected no correlation between waiting time and inbreeding depression across families. In agreement with recent models, this result shows that mutational variance rather than differential purging accounts for most of the genetic variance in inbreeding depression within a population.

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Maternal effects on the genetic evaluation of Tabapuã beef cattle

Cited by 11 publications

References 10 publications

Estimation of genetic parameters for growth traits in Tabapuã cattle using a multi-trait model

Estimation of genetic parameters for growth traits in Tabapuã cattle using a multi-trait model

Genetic parameter estimation for pre- and post-weaning traits in Brahman cattle in Brazil

No Correlation Between Inbreeding Depression and Delayed Selfing in the Freshwater Snail Physa Acuta

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