Introgression maintains the genetic integrity of the mating-type determining chromosome of the fungus Neurospora tetrasperma.

ABSTRACT: Genome evolution is driven by a complex interplay of factors, including selection, recombination, and introgression. The regions determining sexual identity are particularly dynamic parts of eukaryotic genomes that are prone to molecular degeneration associated with suppressed recombination. In the fungus Neurospora tetrasperma, it has been proposed that this molecular degeneration is counteracted by the introgression of nondegenerated DNA from closely related species. In this study, we used comparative and population genomic analyses of 92 genomes from eight phylogenetically and reproductively isolated lineages of N. tetrasperma, and its three closest relatives, to investigate the factors shaping the evolutionary history of the genomes.We found that suppressed recombination extends across

SUBMITTER: Corcoran P 

PROVIDER: S-EPMC4817772 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature