To test these predications, microsatellite allelic variation at loci specific to Symbiodinium Clade B was 1) examined from symbiont populations of these scleractinian species on Florida Keys and Bahamian reefs, and; 2) tracked over an approximately three-year period.
This has been suggested to happen if genetic variation at loci coding for cuticular hydrocarbons, the chemical recognition cues of social insects [35], would be reduced either by a genetic bottleneck during introduction [36] or by selection following introduction [10].
The variation among extant species must have arisen from ancestral genetic variation at loci controlling a range of relevant processes.
Little, however, is known about whether positive selection may have shaped sequence variation at loci involved in social cognition.
Female mate choice may be adaptive when males exhibit heritable genetic variation at loci encoding resistance to infectious disease.
This allowed comparison of genetic variation at loci previously associated with LVH between cases of LVH and controls.
Standing variation at loci that contribute to mate choice phenotypes may permit novel pheromone mating systems to arise in the presence of strong stabilizing selection.
Importantly, with constant influx of allelic variation at loci without adaptive value, there should be fewer spurious allelic differences among populations.
In QTL studies performed in divergent pig populations and their crosses, it has been shown that even in these selected populations there is still a considerable amount of genetic variation at loci affecting traits of interest [ 24].
Similarly, in a study by Kamiya et al. (24), results from yeast two-hybrid assays suggest that genetic variation at loci proximal to the DISC1 NDEL1 interaction domain modulates the binding affinity of NDEL1 to DISC1.
