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. © 2007 Elsevier Masson SAS. All rights reserved.
CITATION STYLE
Ivannikova, Y. V., Naumova, E. S., & Naumov, G. I. (2007). Viral dsRNA in the wine yeast Saccharomyces bayanus var. uvarum. Research in Microbiology, 158(8–9), 638–643. https://doi.org/10.1016/j.resmic.2007.07.008
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