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Desynaptische Mutanten mit Unterschieden im Univalentenverhalten

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Abstract

After application of neutrons on dry seeds ofPisum sativum three recessive mutants were isolated showing irregularities in the course of meiosis. A cytogenetical analysis showed that at metaphase I, a varying number of univalents are formed, most likely as a result of reduced chiasma frequencies. At anaphase I, some univalents divide precociously in mutant 2982 but none do so in mutants 2989 and 2552. As a consequence, most cells of 2989 and 2552 built up more than two spindles at anaphase II, whereas the majority of cells in 2982 form two spindles. This situation is reflected in the frequency distribution of “gones per PMC” at tetrad stage. The discussion deals with the possible causes of univalent formation at meiotic prophase and the variability of univalent behaviour at anaphase I.

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Authors and Affiliations

  1. Institut für Genetik der Universität Bonn, Bonn, Deutschland

    H. D. Klein

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  1. H. D. Klein
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Klein, H.D. Desynaptische Mutanten mit Unterschieden im Univalentenverhalten. Genetica 40, 566–576 (1969). https://doi.org/10.1007/BF01787381

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  • DOI: https://doi.org/10.1007/BF01787381

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