Genic differences and rate of growth in yeasts

Mallya, Prema Bai ; Subramaniam, M. K. (1949) Genic differences and rate of growth in yeasts Nature, 163 . pp. 251-252. ISSN 0028-0836

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A brewery diploid strain of yeast kept under constant observation for the past two years showed a seasonal variation in the characteristics of its giant colonies. On the basis of normal and induced reverse mutations, it was surmised that different mutants get established during the various seasons of the year, and hence strains having diverse genic constitutions should differ not only in their viability but also in their growth-rate under particular environmental conditions. It was shown in a previous contribution that the growth-curves of the diploid and autotetraploid are widely different. Since strains having different genic constitutions were available in this Laboratory, it was considered that a study of the growth-rates of two strains assumed to be homo-and heterozygous for the rough allele would be interesting.

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