Genomic structure and evolution of the mating type locus in the green seaweed Ulva partita.

ABSTRACT: The evolution of sex chromosomes and mating loci in organisms with UV systems of sex/mating type determination in haploid phases via genes on UV chromosomes is not well understood. We report the structure of the mating type (MT) locus and its evolutionary history in the green seaweed Ulva partita, which is a multicellular organism with an isomorphic haploid-diploid life cycle and mating type determination in the haploid phase. Comprehensive comparison of a total of 12.0 and 16.6 Gb of genomic next-generation sequencing data for mt^- and mt⁺ strains identified highly rearranged MT loci of 1.0 and 1.5 Mb in size and containing 46 and 67 genes, respectively, including 23 gametologs. Molecular evolutionary analyses suggested that the MT loci diverged over a prolonged perio

SUBMITTER: Yamazaki T 

PROVIDER: S-EPMC5601483 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature