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Chromosome locations of leaf rust resistance genes in selected tetraploid wheats through substitution lines


Langdon durum D-genome disomic substitution lines were used to study the chromosome locations of adult-plant leaf rust resistance genes identified from tetraploid wheat accessions. The accessions are 104 (Triticum turgidum subsp. dicoccum var. arras) and 127 (T. turgidum subsp. durum var. aestivum). The complete sets of the substitution lines were crossed as female parents with the accessions and F1 double monosomic individuals selected at metaphase I. Segregating F2 individuals were inoculated during the flag leaf stage with pathotype UVPrt2 of Puccinia triticina. The substitution analysis involving accession 104 showed that the gene for leaf rust resistance is located on chromosome 6B. The analysis with accession 127 indicated that chromosome 4A carries a gene for leaf rust resistance. The two novel genes are temporarily designated as Lrac104 and Lrac127, respectively from accessions 104 and 127.

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Correspondence to Shimelis Hussein.

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Hussein, S., Spies, J.J., Pretorius, Z.A. et al. Chromosome locations of leaf rust resistance genes in selected tetraploid wheats through substitution lines. Euphytica 141, 209–216 (2005).

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  • chromosome location
  • cytogenetic analysis
  • D-genome substitutions
  • leaf rust
  • Triticum turgidum