title: [Statistical parameter "essentiality of heterosis" and its genetic meaning].
abstract: 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.
authors.forename: M E
authors.initials: ME
authors.lastname: Mikhaĭlov
mesh_terms: D003433:Crosses, Genetic; D006823:Hybrid Vigor; D008957:Models, Genetic; D040641:Quantitative Trait Loci / Q000235:genetics*; D003313:Zea mays / Q000235:genetics*