In these cases, herbivory on hybrids may show a dominance deviation
toward one or the other parent, but still be intermediate between the parents (Fritz et al.
Both studies found that dominance deviations
of inbred individuals became negatively correlated with their breeding values, whereas dominance deviations
and breeding values are independent in noninbred individuals by definition.
Partitioning b' component of variation into b ' b ' and b3' components dominance effects get also partitioned into direction of dominance dominance deviations
attributed to the parental arrays and dominance deviations
ascribable to the individual hybrids.
The component of the additive effect (a) would never be negative, whereas the signal component of the effects of dominance deviations
(d) depends on the predominant direction of dominance (MATHER; JINKS, 1984).
1986b), demonstrating the presence of intralocus dominance deviations
and suggesting that segregating rare recessives made an important contribution to observed patterns of genetic variance.
If this limited sample is sufficiently large, the resulting distribution of seed parent breeding values and dominance deviations
will be nearly identical to the true distribution of seed parent breeding values and dominance deviations
Thus, the genotypic variance is mainly explained by the variance of dominance deviations
, evidenced by high values of the ratio [[?
Cheverud and Routman (1995) give equations for calculating breeding values and dominance deviations
and their variances for two-locus systems with random mating and linkage equilibrium.
For both traits, the variance due to dominance deviations