title: [Heterogeneity of the yeasts Zygowilliopsis californica: Z. californica var. dimennae comb. nov., stat. nov. and Z. californica var. fukushimae comb. nov., stat. nov].
abstract: A significant heterogeneity of the species Zygowilliopsis californica was revealed using RFLP-analysis of the PCR-amplified rDNA fragment spanning the 5.8S rRNA gene and the internal transcribed spacers ITS1 and ITS2. Phylogenetic analysis of the nucleotide sequences of ITS1 and ITS2 rDNA differentiated three varieties: Z. californica var. californica, Z. californica var. dimennae, and Z. californica var. fukushimae. The most variable was the ITS 2 region, where 7-26 nucleotide substitutions were revealed. The varieties formed semisterile hybrids with meiotic segregation of control markers. The limits of the phylogenetic species concept are discussed.
authors.forename: E S
authors.initials: ES
authors.lastname: Naumova
authors.forename: D O
authors.initials: DO
authors.lastname: Gazdiev
authors.forename: G I
authors.initials: GI
authors.lastname: Naumov
mesh_terms: D001208:Asia; D044362:Australasia; D004271:DNA, Fungal / Q000235:genetics; D021903:DNA, Ribosomal Spacer; D005060:Europe; D009656:North America; D010802:Phylogeny; D012150:Polymorphism, Restriction Fragment Length; D012331:RNA, Fungal / Q000235:genetics; D012340:RNA, Ribosomal, 5.8S / Q000235:genetics; D012988:Soil Microbiology; D013045:Species Specificity; D015003:Yeasts / Q000145:classification* / Q000235:genetics
chemical_list: D004271:DNA, Fungal; D021903:DNA, Ribosomal Spacer; D012331:RNA, Fungal; D012340:RNA, Ribosomal, 5.8S