Prezygotic reproductive isolation between Saccharomyces cerevisiae and Saccharomyces paradoxus.

ABSTRACT:

Background

Matings between different Saccharomyces sensu stricto yeast species produce sexually sterile hybrids, so individuals should avoid mating with other species. Any mechanism that reduces the frequency of interspecific matings will confer a selective advantage. Here we test the ability of two closely-related Saccharomyces sensu stricto species to select their own species as mates and avoid hybridisation.

Results

We set up mate choice tests, using five independently isolated pairs of species, in which individual germinating spores were presented with the opportunity to mate either with a germinating spore of their own species or with a germinating spore of the other species. For all five strain pairs, whether a S. cerevisiae or S. paradoxus occupies the role of "choose

SUBMITTER: Maclean CJ 

PROVIDER: S-EPMC2249576 | biostudies-literature | 2008 Jan

REPOSITORIES: biostudies-literature