Читать книгу Principles of Plant Genetics and Breeding - George Acquaah - Страница 158

Overdominance gene action exists when each allele at a locus produces a separate effect on the phenotype, and their combined effect exceeds the independent effect of the alleles. From the breeding standpoint, the breeder can fix overdominance effects only in the first generation (i.e. F₁ hybrid cultivars) through apomixes.