Evaluation of common wheat cultivars for tan spot resistance and chromosomal location of a resistance gene in the cultivar 'Salamouni'

W. Tadesse, S. L.K. Hsam, F. J. Zeller

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43 Scopus citations

Abstract

A total of 50 wheat (Triticum aestivum L.) cultivars were evaluated for resistance to tan spot, using Pyrenophora tritici-repentis race 1 and race 5 isolates. The cultivars 'Salamouni', 'Red Chief, 'Dashen', 'Empire' and 'Armada' were resistant to isolate ASC1a (race 1), whereas 76% of the cultivars were susceptible. Chi-squared analysis of the F2 segregation data of hybrids between 20 monosomic lines of the wheat cultivar 'Chinese Spring' and the resistant cultivar 'Salamouni' revealed that tan spot resistance in 'Salamouni' was controlled by a single recessive gene located on chromosome 3A. This gene is designated tsn4. The resistant cultivars identified in this study are recommended for use in breeding programmes to improve tan spot resistance in common wheat.

Original languageEnglish
Pages (from-to)318-322
Number of pages5
JournalPlant Breeding
Volume125
Issue number4
DOIs
StatePublished - Aug 2006

Keywords

  • Disease resistance
  • Pyrenophora tritici-repentis
  • Triticum aestivum
  • tsn4

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