Abstract
The relationship between the generaHansenula andPichia was examined through comparisons of DNA relatedness among phenotypically similar species.Hansenula minuta andPichia lindneri showed 75% DNA base sequence complementarity. In other comparisons,H. nonfermentans was found to share nearly 50% of its DNA sequences with bothH. minuta andP. lindneri. Because of the high degree of relatedness observed, it is proposed that ability to assimilate nitrate, the sole distinction betweenHansenula andPichia, is of insufficient taxonomic value for the reliable separation of either species or genera. Hat-spored species ofHansenula H. et P. Sydow 1919 are being transferred toPichia Hansen 1904. Species ofHansenula andPichia with Saturn-shaped ascospores will be transferred to the genusWilliopsis.
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Kurtzman, C.P. Synonomy of the yeast generaHansenula andPichia demonstrated through comparisons of deoxyribonucleic acid relatedness. Antonie van Leeuwenhoek 50, 209–217 (1984). https://doi.org/10.1007/BF02342132
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DOI: https://doi.org/10.1007/BF02342132