Sentence examples for mean genetic value from inspiring English sources

Overall, phase 3 is characterized by a continuous decrease in genetic variance and the reaching of an asymptotic mean genetic value in populations; the genetic cline is establishing.

As a consequence, a larger shift in the mean genetic value should be expected at extreme latitudes in our grid settings.

Because assortative mating will filter immigrant alleles so that they can mate with trees of recipient populations, we compare the genetic values of immigrant alleles to local alleles to explore whether gene flow will modify the mean genetic value of populations.

We can subdivide the evolutionary process into three main phases, illustrated in Figures 4, 5, 6, 7 and 8. (1) In the very early generations (05), the mean genetic value is 0 for all populations, there is no within-population allelic covariance, and alleles are randomly spread over the landscape.

We prove that, for an additive trait in an arbitrary population, the formula in Equation 4 for the genetic value of line i a i = ∑ k = 1 m ˜ (X ˜ i k − 2 p ˜ k ) u k ≡ ∑ k W ˜ i k u k equals two times the mean genetic value of its progeny under random mating, expressed relative to the population mean.

Assortative mating in association with environmental gradients substantially shifted the mean genetic values of populations.

These results suggested that assortative mating differentiated populations and shifted their mean genetic values.

As a result, the mean genetic values of the population shift strongly, leading to the progressive formation of the genetic cline.

Assortative mating within populations tends now to become a selective factor favoring phenotypes following the shift of the mean genetic values.

We consequently examined the spatial distribution of mean genetic values across the landscape; indeed, a cline of genetic values built up during the early generations following a south-north gradient.

Because moderate assortative mating generates less extreme genotypes over generations, distant gene flow is promoted less and the mean expected shift in the mean genetic values of populations remains limited.