Links to GitHub repositories for recent studies:
We compared levels of autosomal and Z-linked sequence divergence between rattlesnake (Crotalus) species to infer a ratio of male-to-female mutation rate. We found evidence of a ~2-fold male-biased mutation rate, which has ramifications for rates of evolution in sex-linked genes in snakes.
Using a whole-genome resequencing dataset, we explored genetic diversity and differentiation across the genome between barn swallow (Hirundo rustica) subspecies. We compared variation on the Z chromosomes and autosomes to understand how different evolutionary processes have impacted sex-linked genetic diversity in this young species complex. We found evidence that low sex-linked diversity has been shaped by a combination of excess variance in male reproductive success, recent population bottlenecks, linked selection, and reduced gene flow on the Z chromosome.