Additive Genetic Variance


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Related to Additive Genetic Variance: Quantitative genetics, narrow sense heritability

Additive Genetic Variance

Evolutionary biology The ratio of altered genes and alleles to all of the genes that influence a particular trait
See Genetic variation
References in periodicals archive ?
Owing to weak, E component much of the variance could be explained on the basis of genetic component comprising two parameters which may be responsible for 89.8% of the variance--the additive genetic variance and the dominance.
Species-wide differences between male and female intensities of selection and additive genetic variances were tested using this same procedure.
For GY, additive genetic variance was of 290,61 [(g [plant.sup.-1]).sup.2] and can be considered high when compared to the value obtained by Carvalho and Souza (2007), which was of 147,7 [(g [plant.sup.-1]).sup.2] from BR 5011 Sertanejo variety.
They found substantial maternal additive genetic variance and a positive direct-maternal additive [TABULAR DATA FOR TABLE 2 OMITTED] genetic covariance resulting in predicted accelerated responses to selection as a result of maternal inheritance.
The additive genetic variance is given by [[sigma].sup.2.sub.a] = [[summation].sup.m.sub.i=1] 2[p.sub.i][q.sub.i] [[sigma].sup.2.sub.[alpha]][I.sub.ai].
Additive genetic variances were found for number of grains per row and number of grain rows per ear under high density plantation (Borghi et al., 2012).
Epistasis and the evolution of additive genetic variance in populations that pass through a bottleneck.
In addition, there was a decrease in the additive genetic variance for crossvein length in the stressful environment.
Variance components (additive genetic variance and phenotypic variance) and heritability estimates for different parities are shown in Table 3.
The heritability is a ratio between additive genetic variance and total phenotypic variance.
where A is the kin matrix between the animals; [[sigma].sup.2.sub.a] is the direct additive genetic variance; [[sigma].sup.2.sub.c], [[sigma].sup.2.sub.w] and [[sigma].sup.2.sub.e] are variances of common environmental effects of larva culture, nursery and residues, respectively; [I.sub.h] identity matrix of the order h, with h equal to the number of hapas of the larva culture; [I.sub.c] identity matrix of the order c, with c equal to the number of hapas of nursery; [I.sub.n] identity matrix of the order n, with n equal to the number of observations.