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Coordination on timing of gene expression in Paramecium

Published online by Cambridge University Press:  14 April 2009

Koji Myohara
Koji Myohara
Affiliation:
Biological Institute, Tohoku University, Aoba-Yama, Sendai, 980, Japan
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In Paramecium caudatum, syngen 3, cells become mature (i.e. capable of undergoing conjugation) by about 50 fissions after conjugation. Matingtype-instability, another mating characteristic, begins to occur between 80 and 120 fissions after conjugation in heterozygotes for the mating type locus (Myohara & Hiwatashi, 1975). Mating-type instability also occurs in dominant homozygotes, earlier than in heterozygotes. In two different early maturing mutants the homozygotes become mature 20 fissions earlier than in wild-type clones, and mating-type instabiliiy also begins earlier than in wild-type clones. The number of fissions from maturity to the occurrence of the mating type change does not differ.

Type
Research Article
Information
Genetics Research , Volume 36 , Issue 1 , August 1980 , pp. 81 - 89
Copyright
Copyright © Cambridge University Press 1980

References

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