Genome Analysis of a Newly Discovered Yeast Species, <i>Hanseniaspora menglaensis</i>
2024
Adam P. Ryan | Marizeth Groenewald | Maudy Th. Smith | Cian Holohan | Teun Boekhout | Kenneth H. Wolfe | Geraldine Butler
Annual surveys of Irish soil samples identified three isolates, CBS 16921 (UCD88), CBS 18246 (UCD443), and CBS 18247 (UCD483), of an apiculate yeast species within the <i>Hanseniaspora</i> genus. The internal transcribed spacer (ITS) and D1/D2 region of the large subunit (LSU) rRNA sequences showed that these are isolates of the recently described species <i>Hanseniaspora menglaensis</i>, first isolated from Southwest China. No genome sequence for <i>H. menglaensis</i> is currently available. The genome sequences of the three Irish isolates were determined using short-read (Illumina) sequencing, and the sequence of one isolate (CBS 16921) was assembled to chromosome level using long-read sequencing (Oxford Nanopore Technologies). Phylogenomic analysis shows that <i>H. menglaensis</i> belongs to the fast-evolving lineage (FEL) of <i>Hanseniaspora</i>. Only one <i>MAT</i> idiomorph (encoding <i>MAT</i>α1) was identified in all three sequenced <i>H. menglaensis</i> isolates, consistent with one mating type of a heterothallic species. Genome comparisons showed that there has been a rearrangement near <i>MAT</i>α of FEL species compared to isolates from the slowly evolving lineage (SEL).
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