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Synapsis and chiasma formation in four meiotic mutants of tomato (Lycopersicon esculentum)

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Abstract

Synapsis and chiasma formation were studied in pollen mother cells of four meiotic mutants of tomato. The four mutants displayed defects in the assembly of the synaptonemal complex (SC) covering the whole range from almost complete absence of synapsis to complete synapsis at pachytene. In three mutants, we found a good correlation between the number of bivalents connected by at least one tripartite SC segment at pachytene and the number of chiasmatic bivalents at metaphase I. We suggest that in tomato functional chiasmata are only formed in the context of the tripartite SC.

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Authors and Affiliations

  1. Department of Genetics, Wageningen Agricultural University, Dreijenlaan 2, 6703 HA, Wageningen, The Netherlands

    F. W. J. Havekes, J. H. de Jong & C. Heyting

  2. Department of Plant Breeding, Wageningen Agricultural University, Lawickse allee 166, 6709 DB, Wageningen, The Netherlands

    M. S. Ramanna

Authors
  1. F. W. J. Havekes
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  2. J. H. de Jong
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  3. C. Heyting
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  4. M. S. Ramanna
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Correspondence to J. H. de Jong.

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Havekes, F.W.J., de Jong, J.H., Heyting, C. et al. Synapsis and chiasma formation in four meiotic mutants of tomato (Lycopersicon esculentum). Chromosome Res 2, 315–325 (1994). https://doi.org/10.1007/BF01552725

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  • DOI: https://doi.org/10.1007/BF01552725

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