disassortative mating


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Related to disassortative mating: major histocompatibility complex
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Noun1.disassortative mating - mating of individuals having traits more dissimilar than likely in random mating
mating, pairing, sexual union, union, coupling, conjugation - the act of pairing a male and female for reproductive purposes; "the casual couplings of adolescents"; "the mating of some species occurs only in the spring"
assortative mating - mating of individuals having more traits in common than likely in random mating
References in periodicals archive ?
Disassortative mating in tristylous Eichhornia paniculata (Pontederiaceae).
The observed nonrandom visit orders would result in disassortative mating between corolla color phenotypes of nonmodel deceptively pollinated species.
In conclusion, these laboratory studies show that the initial sampling behavior of pollinators visiting deceptive species that do not mimic any other rewarding species could induce negative FDS and disassortative mating on corolla color phenotypes within a plant population.
Ploidy, however, does not affect the theoretical dynamics of tristylous populations because, with only two alleles per locus and strong disassortative mating among morphs, autotetraploid tristyly loci effectively behave as diploid loci (Heuch and Lie 1985; Eckert and Barrett 1992).
The rates of self-fertilization (s), disassortative mating among morphs (d), and year-to-year survival (I) were set to values likely for populations of species like L.
Fisher (1941, 1944) first suggested that disassortative mating among style morphs in tristylous plant populations should lead to a single equilibrium with the three morphs at equal frequencies.
The morph ratio in populations of tristylous species is governed by an interaction between frequency-dependent selection due to disassortative mating and stochastic processes.
If females were choosing males to increase their offspring viability, then disassortative mating with respect to karyotype would be observed.
Theoretical models indicate that all three morphs should occur at equal frequency within populations, because they are maintained by frequency-dependent selection due to strong disassortative mating among the morphs (Charlesworth, 1979; Heuch, 1979; Barrett et al., 1987; Barrett et al., 1989).