An additive dominant model of inheritance of a quantitative trait in a group of hybrids is considered. The parameter “essentiality of heterosis,” associated with the frequency of high-parent heterosis, was proposed to characterize the expression of a trait in a group. An expression was obtained to relate essentiality of heterosis, mean dominance, and trait polygenity, which is fulfilled upon a random and independent distribution of advantageous alleles among the parents. A measure of polygenity of a trait taking into account inequality of quantitative effects of different loci was proposed.
Russian Journal of Genetics – Springer Journals
Published: Jul 15, 2005
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