2010
DOI: 10.1590/s1516-35982010000900013
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Behavior of genetic (co)variance components in populations simulated from non-additive genetic models of dominance and overdominance

Abstract: -The aim of this work was to investigate the short-term behavior of the genetic variability of quantitative traits simulated from models with additive and non-additive gene action in control and phenotypic selection populations. Both traits, one with low (h 2 = 0.10) and the other with high (h 2 = 0.60) heritability, were controlled by 600 biallelic loci. From a standard genome, it was obtained six genetic models which included the following: only the additive gene effects; complete and positive dominance for … Show more

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“…Although additive genetic variance is considered the most important parameter for genetic improvement (Vencovsky, 1987), it is necessary to consider the deviations of dominance in the selection process of traits under its influence to avoid possible errors in breeding programs attributed to overestimation of heritability in the narrow sense (Cunha et al, 2010). Thus, the traits that obtained the highest values of genetic variance, heritability and selective accuracy should be considered for selection.…”
Section: Discussionmentioning
confidence: 99%
“…Although additive genetic variance is considered the most important parameter for genetic improvement (Vencovsky, 1987), it is necessary to consider the deviations of dominance in the selection process of traits under its influence to avoid possible errors in breeding programs attributed to overestimation of heritability in the narrow sense (Cunha et al, 2010). Thus, the traits that obtained the highest values of genetic variance, heritability and selective accuracy should be considered for selection.…”
Section: Discussionmentioning
confidence: 99%