Following up from this question: Does recombination increase the additive genetic variance for fitness?
(I'm thinking about the evolution of additive genetic variance and differences between the sex chromosomes and autosomes. Assume males are heterogametic (XY) and females XX, recombination occurs on the X in females, but not between X and Y in males. This means X chromosomes recombine at 2/3rds the rate of autosomes. Answers need not necessarily relate to sex chromosomes as many other factors should be affecting their evolution and additive genetic variance)
As far as I can tell, recombination should improve the efficiency of selection as variance in fitness of the population of chromosomes increases (because favourable mutations can combine more easily and deleterious ones do too) which should in turn reduce additive genetic variance (right?). But then recombination means many more combinations occurs which means additive genetic variance might be higher.
So, if I sample the additive genetic variance in a trait in a population where chromosomes that do recombine and a population where chromosomes do not recombine, where should we see the most variance (the recombiners or non-recombiners)?