In all, the evolution of fertilization traits within populations, whether driven by sexual conflict or sexual selection, underlies mating incompatibilities between heterospecific (or heteropopulation) individuals in this complex.
In this population, monogyne and polygyne colonies live in close proximity with no sign of genetic differentiation or mating incompatibilities between social forms [23], [24].
The limited genetic exchange between sympatric arboreal and avian populations may also be attributed to (i) mating incompatibility and/or (ii) spatial segregation.
Sexual reproduction in fungi is controlled by the mating-type (MAT) loci, in which the genes determine mating incompatibility and regulate key mating processes (Coppin et al. 1997; Debuchy et al. 2010).
Factors promoting the emergence of sharp phylogeographic breaks include restricted dispersal, habitat discontinuity, physical barriers, disruptive selection, mating incompatibility, genetic surfing and secondary contact.
Such crosses were performed by the present authors in a project concerned with the detection of mating incompatibility relations in Alnus species.
Specifically, high genetic divergence may reflect differences in behaviour and/or morphological characteristics that result in mating incompatibility among populations of the target species [ 21, 23].
This is because selection is frequency dependent on the mating incompatibilities.
We believe that this approach is also applicable to other reinforcement scenarios, i.e. with postzygotic isolation caused by nuclear mating incompatibilities.
Why, after their incompatibility had become obvious, did he stay with her for eighteen years?
