Preparation of tomato meiotic pachytene and mitotic metaphase chromosomes suitable for fluorescencein situ hybridization (FISH) (original) (raw)

Abstract

Fluorescence_in situ_ hybridization (FISH) is an increasingly powerful tool with a variety of applications in both basic and applied research. With excellent genetic, cytogenetic and molecular maps available, the tomato genome provides a good model to benefit from the full potential of FISH. Tomato chromosomes at mitotic metaphase are small and not particularly suitable for high-resolution FISH. In contrast, chromosomes at meiotic pachytene are about 15 times longer, and easier to identify by their differences in chromosome arm lengths and chromomere pattern. We have developed a technique for preparing chromosomal spreads of young pollen mother cells at midprophase I which is suitable for FISH. In a first series of experiments, the hybridization patterns of three classes of repetitive DNA sequences were studied in single and multicolour FISH.

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Authors and Affiliations

  1. Department of Molecular Biology, Wageningen Agricultural University, Dreijenlaan 3, 6703 HA, Wageningen, The Netherlands
    Xiao-Bo Zhong & Pim Zabel
  2. Department of Genetics, Wageningen Agricultural University, Dreijenlaan 3, 6703 HA, Wageningen, The Netherlands
    J. Hans de Jong

Authors

  1. Xiao-Bo Zhong
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  2. J. Hans de Jong
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  3. Pim Zabel
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accepted for publication by J. S. (Pat) Heslop-Harrison

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Zhong, XB., de Jong, J.H. & Zabel, P. Preparation of tomato meiotic pachytene and mitotic metaphase chromosomes suitable for fluorescence_in situ_ hybridization (FISH).Chromosome Res 4, 24–28 (1996). https://doi.org/10.1007/BF02254940

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