THE PHYLOGENETIC RELATIONSHIP OF THE Q₉- EQUIPPED SPECIES OF THE HETEROBASIDIOMYCETOUS YEAST GENERA RHODOSPORIDIUM AND LEUCOSPORIDIUM BASED ON THE PARTIAL SEQUENCES OF 18S AND 26S RIBOSOMAL RIBONUCLEIC ACIDS: THE PROPOSAL OF A NEW GENUS KONDOA

Abstract

Eight strains of the Q₉-equipped heterobasidiomycetous yeast species, Rhodosporidium malvinellurn, Rhodosporidium toruloides, and Leucosporidium scottii and the Q₉-equipped anamorphic yeast species, Rhodotorula lactosa were examined as to the partial sequence determinations of 18S rRNA and 26S rRNA. The positions determined were 1451 through 1618 of 18S rRNA and 492 through 625 of 26S rRNA. The two determinations of the partial sequences of 18S rRNA and 26S rRNA showed that the four species mentioned above constituted their own separate clusters. Rhodosporidium malvinellum occupied a unique situation. The phylogenetic relationship between R. malvinellum and R. toruloides was more distant than that between R. toruloides and L. scottii. The data indicated that these three heterobasidiomycetous yeast species are distinguished from each other at the generic level. The new genus Kondoa was proposed for R. malvinellum.