Saccharomycodes ludwigii has seven chromosomes

Abstract

Tetrad distributions for 108 different gene pairs in 1346 asci of 113 diploids heterozygous for various combinations of 24 genes in Saccharomycodes ludwigii were investigated. Tetratype tetrads occurred only rarely and the 24 genes tested were classified into seven linkage groups. Electrophoretic karyotypes of three independent strains of S'codes ludwigii showed seven bands of chromosome‐sized DNA having molecular sizes of 0·8 to 2·3 Mb with strain‐specific polymorphic chromosomal DNAs as determined based on their migration distances.

Morphology of mitochondrial nucleoids, mitochondria, and nuclei during meiosis and sporulation of the yeast Saccharomycodes ludwigii

“…Determination of the mechanism of ledge formation will raise interesting issues in terms of how intratetrad mating is regulated. S. ludwigii has seven chromosomes, but genetic recombination does not occur as a result of meiosis (Yamazaki and Oshima, 1996;Yamazaki et al, 1976). We could observe 16 bivalent chromosomes of S. cerevisiae that specifi cally appeared at the meiotic prophase by DAPI staining (Kuroiwa et al, , 1986.…”

"A comparison between sugar consumption and ethanol production in wort by immobilized Saccharomyces Cerevisiae, Saccharomyces Ludwigii and Saccharomyces Rouxii on Brewer's Spent Grain"

“…Saccharomyces ludwigii appears as lemon-shaped cells (6,18,23) with blunt tips, sausage-shaped, curved, or elongated with a swelling in the middle. At times, cells are single or appear in pairs or groups of three (6).…”

“…At times, cells are single or appear in pairs or groups of three (6). Asexual reproduction is by bipolar budding (6,23). Glucose, sucrose, and raffinose are among the sugars that can be fermented by this microorganism while it can assimilate glucose, sucrose, raffinose and glycerol (6).…”

A history of research on yeasts 10: foundations of yeast genetics1

“…25 25 Gene symbols : symbols used for Saccharomycodes ludwigii genes423 correspond with those used for Saccharomyces cerevisiae 335: a wild‐type structural gene is written in italic capitals (e.g. ADE1 ) and the corresponding mutant in italic lower case (e.g.…”