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Modifications de la haute fréquence de réversion du mutant nic-2 chez le Coprinus radiatus

1.Mise en évidence de trois types de souches, donnant une réversion plus ou moins élevée

Modifications of the high frequency of reversion of a nicotinique two mutant

1.Evidence for the existence of three kinds strains, with more or less important reversion frequencies

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Summary

In Coprinus radiatus, a cross homozygous for nic-2 mutation yields two types of nic-strains. The first one (nic-2F) retains the character of the original mutant, reverting at meiosis with a frequency of 20 to 30%. All crosses with the second type (nic-2 fa) show a sharply reduced reversion rate.

The analysis of the progeny of crosses involving a nic-2 fa strain show the appearance of a third type of strains (nic-2 fn). The reversion of nic-2 fn strain is low, but this character is not imposed to the partner in a cross with a nic-2F strain.

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Références

  • Brinck, R.A.: Paramutation at the R locus in maïze. Cold Spr. Harb. Symp. quant. Biol. 23, 379–391 (1958).

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  • Guerdoux, J.L.: Révérsion à haute fréquence d'un gène nicotinique moins chez le Coprinus radiatus. Molec. Gen. Genetics 105, 334–343 (1969).

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  • Prevost, G.: Étude Génétique d'un Basidiomycète, Coprinus radiatus Fr. Ex. Bolt. Thèse, Paris (1962).

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Authors and Affiliations

  1. Centre de Génétique Moléculaire du C.N.R.S., Gif sur Yvette (91)

    J. L. Guerdoux

  2. Faculté des Sciences d'Orsay, Orsay (91)

    J. L. Guerdoux

Authors
  1. J. L. Guerdoux
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Communicated by G.E. Magni

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Guerdoux, J.L. Modifications de la haute fréquence de réversion du mutant nic-2 chez le Coprinus radiatus . Molec. Gen. Genet. 110, 307–326 (1971). https://doi.org/10.1007/BF00438273

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  • DOI: https://doi.org/10.1007/BF00438273

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