Reference: Davydenko SG, et al. (1990) [Chromosome polymorphism in the yeast Saccharomyces]. Genetika 26(12):2135-46

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Abstract


The variability of chromosomal band patterns was determined by pulse electrophoresis. The natural strains differed by the quantity and electrophoretic mobility of chromosomal DNA bands. The strains of independent genetic stocks originated from the XII race of Saccharomyces cerevisiae showed less significant difference in band patterns than the strains of different species of the Saccharomyces genus. The progeny of among strains with different karyotypes hybrid showed non-regular segregation of parental bands, the occurrence of new bands and the bands with altered mobility. Reverse crosses of hybrid progeny with strains of Peterhoff genetic stocks of S. cerevisiae led to decrease in chromosomal polymorphism. Homozygotization for ski5 allele and selection for increasing the copy number of killer plasmids was accompanied with repeated splash of polymorphism in 1-2 generations of intratetrad and intrafamily crossed hybrid progeny. Subsequent stabilization of electrophoretic karyotype took place, excluding the mendelian dimorphism of chromosome III, with was a stable trait of the last 6 generations of that progeny.

Reference Type
Comparative Study | Journal Article
Authors
Davydenko SG, Milovatskiĭ VS, Nesterova GF, Skliarova LL, Mezhevaia EV, Iarovoĭ BF
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