Biased Gene Retention in the Face of Introgression Obscures Species Relationships.

ABSTRACT: Phylogenomic analyses are recovering previously hidden histories of hybridization, revealing the genomic consequences of these events on the architecture of extant genomes. We applied phylogenomic techniques and several complementary statistical tests to show that introgressive hybridization appears to have occurred between close relatives of Arabidopsis, resulting in cytonuclear discordance and impacting our understanding of species relationships in the group. The composition of introgressed and retained genes indicates that selection against incompatible cytonuclear and nuclear-nuclear interactions likely acted during introgression, whereas linkage also contributed to genome composition through the retention of ancient haplotype blocks. We also applied divergence-based tests to determine

SUBMITTER: Forsythe ES 

PROVIDER: S-EPMC7533067 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature