منابع مشابه
Frequency-dependent selection: Minority male mating advantage in Drosophila
In frequency-dependent selection the fitness of a given genotype depends on its frequency. Frequency dependence may be positive or negative. In the positive case any rare variant is at a disadvantage, whereas rare forms are favoured in the negative case. One of the best-studied examples of frequency-dependent selection is the rare male mating advantage or minority male mating advantage (negativ...
متن کاملFrequency-dependent selection and the evolution of assortative mating.
A long-standing goal in evolutionary biology is to identify the conditions that promote the evolution of reproductive isolation and speciation. The factors promoting sympatric speciation have been of particular interest, both because it is notoriously difficult to prove empirically and because theoretical models have generated conflicting results, depending on the assumptions made. Here, we ana...
متن کاملAn experimental test of frequency-dependent selection on male mating strategy in the field.
We provide field-based experimental evidence for the frequency-dependent nature of the fitness of alternative mating strategies. We manipulated the frequency of genetically determined phenotypic strategies in six wild populations of the side-blotched lizard, Uta stansburiana. The within-population pattern of mating was assessed using nine microsatellite loci to assign paternity. Within populati...
متن کاملEffects of genetic architecture on the evolution of assortative mating under frequency-dependent disruptive selection.
We consider a model of sympatric speciation due to frequency-dependent competition, in which it was previously assumed that the evolving traits have a very simple genetic architecture. In the present study, we numerically analyze the consequences of relaxing this assumption. First, previous models assumed that assortative mating evolves in infinitesimal steps. Here, we show that the range of pa...
متن کاملEffect of mating frequency and weaning-to-mating interval on sow reproductive performance
Methods: Reproductive data were collected from 20 Minnesota and Iowa breeding herds, covering a 7-year period from January 1, 1986–December 31, 1992. Natural mating was used in all herds during the study period. Females bred one, two, or three times during a single estrus were included in the study to compare fertility rates (conception rate, farrowing rate, and adjusted farrowing rate) and lit...
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ژورنال
عنوان ژورنال: Evolution
سال: 1983
ISSN: 0014-3820
DOI: 10.1111/j.1558-5646.1983.tb05550.x