Reference: Stolbova AV (1987) [Genetic analysis of the polyauxotrophy of the early mitotic progeny of Saccharomyces cerevisiae zygotes. III. The behavior of the chromosome-III markers in polyauxotrophic clones and their mitotic and meiotic segregants]. Genetika 23(12):2128-37

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Abstract


Cloning and segregation analysis of polyauxotrophic (PA) progeny, as well as the study of diploid segregants, revealed an unusual state of the diploid genome in these strains. Analysis of linkage markers of chromosome III in all crosses may be expected to illuminate relationships between the homologous chromosomes. All PA strains were assigned to two major classes. In the class of PA strains with recombinant chromosome III, the effect of approachment of third linkage markers was noted. In other strains, transposition of genetic marker metA1 to chromosome III and its linkage to leu2 were discovered. The present study has demonstrated that the unusual state of the diploid genome of PA strains induces multiple nonspecific alterations in chromosome relationship and structure. It is likely that these alterations are the consequence of disturbance in mitotic apparatus of cell.

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Stolbova AV
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