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additive genetic variance |
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additive genetic variance [¦ad·ə·div jə¦ned·ik ′ver·ē·əns] (genetics) That part of the genetic variance of a quantitative character attributed to the average effects of substituting one allele for another at a given locus or at the multiple loci governing a polygenic trait. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Narrow sense heritability was estimated as the proportion of additive genetic variance to total variance as follows, where the terms are the variance components for the terms in the earlier mentioned model: Thus, selective breeding and domestication efforts that emphasize selection on additive genetic variance should be effective, and our data provide no reason to believe that more complicated breeding schemes designed to use nonadditive heterotic effects, whatever the mechanism, would be advantageous over the judicious selection or construction of a base population with low inbreeding depression. 05); therefore even when growth rates differed significantly among environments, the additive genetic variance did not vary from location to location, with the exception of Putemtln and Hueihue for live weight and shell height respectively. |
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