1887

Abstract

Seven yeast strains, representing a single novel anamorphic species, were isolated in Thailand. They consisted of five strains (DMKU-MRY16, DMKU-SK18, DMKU-SK25, DMKU-SK30 and DMKU-SK32) obtained from five different mushrooms, and two strains (ST-224 and 11-14.2) derived from insect frass and soil, respectively. The pairwise sequence analysis indicated that all seven strains had identical sequences in the D1/D2 domains of the large subunit (LSU) rRNA gene and the internal transcribed spacer (ITS) region. was the most closely related species, but with 11.9–12.4% nucleotide substitutions in the D1/D2 domains of the LSU rRNA gene and 13.1–13.3% nucleotide substitutions in the ITS region. The phylogenetic analyses based on the concatenated sequences of the ITS region and the D1/D2 domains of the LSU rRNA gene showed that the seven strains form a well-separated subclade in a clade containing and with high bootstrap support. A phylogenetic analysis of a multilocus dataset including the small subunit (SSU) rRNA gene, the ITS region, the D1/D2 domains of the LSU rRNA gene, translation elongation factor 1-alpha gene, actin gene and the RNA polymerase II subunit 2 gene, confirmed the presence of the monophyletic clade that also includes and , and strongly supported the phylogenetic isolation of the seven strains from its neighbouring species. Therefore, the seven strains were assigned as a single novel species of the genus , according to their phylogenetic relationships. The name sp. nov. is proposed to accommodate the seven strains. The holotype is DMKU-MRY16 (TBRC 11775=NBRC 114386=PYCC 8655). The MycoBank number of the novel species is MB 841280. In addition, is reassigned to the genus . The MycoBank number of comb. nov. is MB 841279.

Funding
This study was supported by the:
  • Kasetsart University Research and Development Institute (Award FF(KU)18.64)
    • Principle Award Recipient: PannidaKhunnamwong
  • Thailand Research Fund (Award RTA608004)
    • Principle Award Recipient: SavitreeLimtong
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/content/journal/ijsem/10.1099/ijsem.0.005183
2022-01-17
2024-03-29
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