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Molecular detection of Lophopyrum chromatin in wheat-Lophopyrum recombinants and their use in the physical mapping of chromosome 7D

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Summary

In situ hybridisation and restriction fragment length polymorphism (RFLP) analysis were used to determine the relative location of the translocation breakpoint and the size of the integrated chromatin segment in hexaploid wheat-Lophopyrum translocation stocks. Three 7el2-7D recombinant stocks were Robertsonian translocations, 7DS.7el. The remaining recombinant stock (KS10-2) was 7elS.7el-7DL and contained only the distal one-half of the long arm of 7D. The recombinant stock with 7el1 (K11695) could be designated 7DS.7DL-7el where approximately the distal one-half of 7DL was replaced. RFLP analysis indicated that on the 7DL RFLP map the breakpoints for K11695 and KS10-2 are in different locations and that the two recombinants contain an overlapping region (a common region) of the Lophopyrum chromosome 7 in which Lr19, a leaf-rust resistant gene, is located. RFLP analysis also indicated that RFLP markers which mapped to within 1.5 cm of the centromere of chromosome 7D are located in the distal half of the long arm.

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Authors and Affiliations

  1. Plant Research Centre, Agriculture Canada, K1A OC6, Ottawa, Ontario, Canada

    N.-S. Kim & K. Armstrong

  2. Department of Crop Science, University of Saskachewan, Saskatoon, Saskachewan, Canada

    D. R. Knott

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  1. N.-S. Kim
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  2. K. Armstrong
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  3. D. R. Knott
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Communicated by J. Mackey

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Kim, NS., Armstrong, K. & Knott, D.R. Molecular detection of Lophopyrum chromatin in wheat-Lophopyrum recombinants and their use in the physical mapping of chromosome 7D. Theoret. Appl. Genetics 85, 561–567 (1993). https://doi.org/10.1007/BF00220914

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  • DOI: https://doi.org/10.1007/BF00220914

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