Gene genealogies indicates abundant gene conversions and independent evolutionary histories of the mating-type chromosomes in the evolutionary history of Neurospora tetrasperma.

ABSTRACT:

Background

The self-fertile filamentous ascomycete Neurospora tetrasperma contains a large (approximately 7 Mbp) and young (< 6 MYA) region of suppressed recombination within its mating-type (mat) chromosomes. The objective of the present study is to reveal the evolutionary history, including key genomic events, associated with the various regions of the mat chromosomes among ten strains representing all the nine known species (lineages) contained within the N. tetrasperma species complex.

Results

Comparative analysis of sequence divergence among alleles of 24 mat-linked genes (mat A and mat a) indicates that a large region of suppressed recombination exists within the mat chromosome for each of nine lineages of N. tetrasperma sensu latu. The recombinationally suppressed reg

SUBMITTER: Menkis A 

PROVIDER: S-EPMC2923516 | biostudies-literature | 2010 Jul

REPOSITORIES: biostudies-literature