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Mutations affecting meiosis in Podospora anserina

I. cytological studies

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Abstract

Forty mutants affecting meiosis and two affecting caryogamy were isolated in Podospora anserina. Growth and mitosis of these mutants were normal. Eighteen of them were studied by both light and electron microscopy so as to determine precisely how the behaviour of the chromosomes and/or the structure of the kinetic apparatus were altered.

In the caryogamy-deficient mutants, the formation of crosiers is normal, but the nuclei of the apical cells never fuse. Three genes affect prophase I. For two of them the mutants are blocked before pachytene, the third being blocked between pachytene and diplotene. The other mutations concern the kinetic apparatus (centrosomal plaques, spindle) and the distribution of the nuclei in the spores.

Some of these mutations are pleiotropic and also affect spore pigmentation, recombination frequency, and mutation rate.

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Authors and Affiliations

  1. Laboratoire de Biologie cellulaire 2 et Laboratoire de Génétique, Université de Paris-Sud, Centre d'Orsay, France

    J. M. Simonet & D. Zickler

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  1. J. M. Simonet
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  2. D. Zickler
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Simonet, J.M., Zickler, D. Mutations affecting meiosis in Podospora anserina . Chromosoma 37, 327–351 (1972). https://doi.org/10.1007/BF00319874

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  • DOI: https://doi.org/10.1007/BF00319874

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