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RFLP markers associated with Sr22 and recombination between chromosome 7A of bread wheat and the diploid species Triticum boeoticum

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Abstract

Analysis of the bread wheat variety Schomburgk, and related lines in its pedigree, identified RFLP markers associated with the segment of chromosome 7A carrying the Sr22 gene derived from the diploid species T. boeoticum. The distribution of the RFLP markers indicated that at least 50% of 7AS and 80% of 7AL in Schomburgk is of T. boeoticum origin. Evaluation of five sets of nearisogenic lines, backcross lines in 20 different genetic backgrounds and an F2 population segregating for Sr22 demonstrated a very low level of recombination between the 7A chromosomes of T. boeoticum and T. aestivum. Several recombinants carrying Sr22 but with a much reduced segment of T. boeoticum were identified and these may prove useful in the breeding of further varieties with Sr22.

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Authors and Affiliations

  1. Department of Plant Science, Waite Campus, University of Adelaide, SA 5064, Glen Osmond, South Australia

    J. G. Paull, M. A. Pallotta & P. Langridge

  2. Plant Breeding Institute, University of Sydney, 2570, Cobbitty, NSW, Australia

    T. T. The

Authors
  1. J. G. Paull
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  2. M. A. Pallotta
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  3. P. Langridge
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  4. T. T. The
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Communicated by G. Wenzel

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Paull, J.G., Pallotta, M.A., Langridge, P. et al. RFLP markers associated with Sr22 and recombination between chromosome 7A of bread wheat and the diploid species Triticum boeoticum. Theoret. Appl. Genetics 89, 1039–1045 (1994). https://doi.org/10.1007/BF00224536

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  • DOI: https://doi.org/10.1007/BF00224536

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