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Yeast. 1996 Mar 15;12(3):237-40.

Saccharomycodes ludwigii has seven chromosomes.

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Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Yamanashi University, Kofu, Japan.


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 center dot 8 to 2 center dot 3 Mb with strain-specific polymorphic chromosomal DNAs as determined based on their migration distances.

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