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A Trichosporonales genome tree based on 27 haploid and three evolutionarily conserved ‘natural’ hybrid genomes
Author(s) -
Takashima Masako,
Sriswasdi Sira,
Manabe RiIchiroh,
Ohkuma Moriya,
Sugita Takashi,
Iwasaki Wataru
Publication year - 2018
Publication title -
yeast
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.923
H-Index - 102
eISSN - 1097-0061
pISSN - 0749-503X
DOI - 10.1002/yea.3284
Subject(s) - biology , genome , phylogenetic tree , genetics , ploidy , gene , sequence assembly , evolutionary biology , computational biology , gene expression , transcriptome
To construct a backbone tree consisting of basidiomycetous yeasts, draft genome sequences from 25 species of Trichosporonales (Tremellomycetes, Basidiomycota) were generated. In addition to the hybrid genomes of Trichosporon coremiiforme and Trichosporon ovoides that we described previously, we identified an interspecies hybrid genome in Cutaneotrichosporon mucoides (formerly Trichosporon mucoides ). This hybrid genome had a gene retention rate of ~55%, and its closest haploid relative was Cutaneotrichosporon dermatis . After constructing the C . mucoides subgenomes, we generated a phylogenetic tree using genome data from the 27 haploid species and the subgenome data from the three hybrid genome species. It was a high‐quality tree with 100% bootstrap support for all of the branches. The genome‐based tree provided superior resolution compared with previous multi‐gene analyses. Although our backbone tree does not include all Trichosporonales genera (e.g. Cryptotrichosporon ), it will be valuable for future analyses of genome data. Interest in interspecies hybrid fungal genomes has recently increased because they may provide a basis for new technologies. The three Trichosporonales hybrid genomes described in this study are different from well‐characterized hybrid genomes (e.g. those of Saccharomyces pastorianus and Saccharomyces bayanus ) because these hybridization events probably occurred in the distant evolutionary past. Hence, they will be useful for studying genome stability following hybridization and speciation events. Copyright © 2017 John Wiley & Sons, Ltd.