Heterogeneity of the yeasts Zygowilliopsis californica: Z. californica var. dimennae comb. nov., stat. nov. and Z. californica var. fukushimae comb. nov., stat. nov. |
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| Authors: | E S Naumova D O Gazdiev G I Naumov |
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| Institution: | (1) State Research Institute of Genetics and Selection of Industrial Microorganisms, Pervyi Dorozhnyi proezd 1, Moscow, 117545, Russia |
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| 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 ITS2 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. |
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| Keywords: | Zygowilliopsis californica ITS1 and ITS2 rDNA phylogenetic analysis |
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