The phylogenetic relationship of Kurtzmanomyces tardus Gimenez-Jurado et van Uden (Cryptococcaceae) based on the partial sequences of 18S and 26S ribosomal RNAs.

Abstract

Kurtzmanomyces tardus Gimenez-Jurado et van Uden was recently described as a second species of the genus Kurtzmanomyces Yamada, Itoh, Kawasaki, Banno et Nakase (Cryptococcaceae) (2). Yamada et al. (8) and Gueho et al. (3) previously determined the partial sequences of 18S and 26S (25S) rRNAs of the strains of species in the stalked conidium-forming anamorphic yeast genera and proved the Q10-equipped, xylose-negative, monotypic genus Kurtzmanomyces to be phylogenetically separable at the generic level.This paper is concerned with the phylogenetic relationship of the second species of the genus Kurtzmanomyces.Kurtzmanomyces tardus IGC 4529 (CBS 7421) was grown, and the rRNA of the yeast strain was prepared as described previously (6). The partial sequences of 18S and 26S rRNAs of the yeast strain were determined by the method of Lane et al. (4)

Molecular Characterization and Application of Random Amplified Polymorphic DNA Analysis of Mrakia and Sterigmatomyces Species

“…Whereas the genera Fellomyces, Kockovaella, Sterigmatosporidium, and Tsuchiyea form a homogeneous cluster within the Tremella type (Table 2) (9, 28), Sterigmatomyces and Kurtzmanomyces species appear to be only distantly related to this group (53). On the basis of qualitative and quantitative cell wall neutral sugar data, the genera Kurtzmanomyces and Sterigmatomyces occupy a distinct position within the Microbotryum type (Table 2) (31,33).…”

Classification of heterobasidiomycetous yeasts: characteristics and affiliation of genera to higher taxa of Heterobasidiomycetes

“…conserved region of the SSU rRNA, the so-called fingerprint segment, is claimed to discriminate genera (Yamada et al 1989a), and Fell and Kurtzman (1990) suggest that nucleotide sequences in a variable region of the LSU rRNA allow taxonomic discrimination at the species level. Genera forming conidia on stalks have recently been divided into two phylogenetic groups (Gueho et al 1990;Yamada et al 1989aYamada et al , 1991. The genera Fellomyces, Sterigmatosporidium, and Tsuchiyaea were found to be phylogenetically related to the genus Filobasidiella, with which they share the presence of xylose, the formation of extracellular starchlike compounds, and the utilization of D-glucuronate (Table 3).…”

“…GuCho et al (1989GuCho et al ( , 1990 constructed phylogenetic trees on the basis of combined results of three regions from both the SSU and LSU rRNA. Different dendrograms for each of these regions were constructed by Yamada et al (1989aYamada et al ( , 1989bYamada et al ( , 1990aYamada et al ( , 1990bYamada et al ( , 1991, Yamada and Kawasaki (1989), and Yamada and Nakagawa (1990).…”