Читать книгу Principles of Plant Genetics and Breeding - George Acquaah - Страница 125

Non‐random mating has two basic forms: (i) mating occurs between individuals that are related to each other by ancestral descent (promotes an increase in homozygosity at all loci), and (ii) individuals mate preferentially with respect to their genotypes at any particular locus of interest. If mating occurs such that the mating pair has the same phenotype more often than would occur by chance, it is said to be assortative mating. The reverse is true in disassortative mating, which occurs in species with self‐incompatibility or sterility problems, promoting heterozygosity.