nonrandom mating


Also found in: Dictionary, Thesaurus, Encyclopedia.

as·sort·a·tive mat·ing

selection of a mate with preference for (or aversion to) a particular genotype, that is, nonrandom mating.
Synonym(s): nonrandom mating

nonrandom mating

any mating in a population where crosses between the various types of individuals do not occur in the frequencies that are expected by chance. Two major types of nonrandom mating can be distinguished: between individuals that are related (see INBREEDING), and between individuals with similar phenotypes (see ASSORTATIVE MATING).
Mentioned in ?
References in periodicals archive ?
The effects of nonrandom mating, different population sizes, or changes in the magnitude of selection, mutation, or migration can be evaluated independently or in combination with one or more of the other forces.
selection is acting), then nonrandom mating can also have effects on the rate of change in allele frequencies and can alter both the mean and variance of fitness and other quantitative genetic traits.
Does nonrandom mating among wild radish plants occur in the field as well as in the greenhouse?
2], which arises by both nonrandom mating and migration.
Crow and Denniston (1988) have derived equations for variance effective size in a population of unequal and variable numbers of male and female individuals under nonrandom mating.
Spotted males at each site other than Hopland sired more than the expected proportion of offspring from spotted mothers, and less than the expectation for unspotted mothers (Table 3), suggesting nonrandom mating.
Even though nonrandom mating was observed for both fathers and sons, no heritable genetic component to male copulatory success was found.
This is the change in mean fitness resulting only from natural selection, and holds regardless of dominance, epistasis, linkage disequilibrium, frequency dependence, or nonrandom mating.
Unpaired males also attempted to displace paired males from their mates; however, this form of mate competition was successful in only 2 of 221 cases and thus did not contribute to observed nonrandom mating patterns.
I analyze two of the cases most likely to cause heterosis due to directional dominance, nonrandom mating and linkage between a marker and a selected locus, and show that the consequences in the Smouse model are precisely equivalent to over-dominance at the marker locus.
Nonrandom mating directly creates genetic covariance between preference and preferred trait genes, [B.
When the lines selected for increased or decreased activity were tested for nonrandom mating, a 50% excess of homotypic mating was observed (i.