Extensive chromosomal rearrangements and rapid evolution of novel effector superfamilies contribute to host adaptation and speciation in the basal ascomycetous fungi.

ABSTRACT: The basal ascomycetes in genus Taphrina have strict host specificity and coevolution with their host plants, making them appealing models for studying the genomic basis of ecological divergence and host adaption. We therefore performed genome sequencing and comparative genomics of different Taphrina species with distinct host ranges to reveal their evolution. We identified frequent chromosomal rearrangements and highly dynamic lineage-specific (LS) genomic regions in Taphrina genomes. The LS regions occur at the flanking regions of chromosomal breakpoints, and are greatly enriched for DNA repeats, non-core genes, and in planta up-regulated genes. Furthermore, we identified hundreds of candidate secreted effector proteins (CSEPs) that are commonly organized in gene clusters that form distin

SUBMITTER: Wang Q 

PROVIDER: S-EPMC7036362 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature