title: Viral dsRNA in the wine yeast Saccharomyces bayanus var. uvarum.
abstract: The presence of viral dsRNA (L and M fractions) in the cryophilic yeast Saccharomyces bayanus var. uvarum is documented here for the first time. Sixty-eight strains of different origins were analyzed. Most of them did not carry dsRNA; the L fraction was found in seven strains, while 11 strains had both L and M fractions. The size of the L fraction was invariable (4.5 kb), as in the cultured yeast Saccharomyces cerevisiae. In contrast to L-dsRNA, the M fraction varied in size from ca. 1.2 to 1.8 kb. In total, seven different M-dsRNA types were recognized (M1-M3 and M8-M11), predominantly among French wine strains of S. bayanus var. uvarum. Phenotypic analysis revealed that the M-dsRNAs found were cryptic and may represent mutant forms of killer plasmids.
authors: State Institute for Genetics and Selection of Industrial Microorganisms, I-Dorozhnyi 1, Moscow 117545, Russia.
authors: Yuliya V
authors: YV
authors: Ivannikova
authors: Elena S
authors: ES
authors: Naumova
authors: Gennadi I
authors: GI
authors: Naumov
mesh_terms: D010957:Plasmids; D012330:RNA, Double-Stranded / Q000032:analysis*; D012367:RNA, Viral / Q000032:analysis*; D012440:Saccharomyces / Q000821:virology*; D012441:Saccharomyces cerevisiae / Q000821:virology; D014920:Wine / Q000382:microbiology*
chemical_list: D012330:RNA, Double-Stranded; D012367:RNA, Viral