Super mildew resistance gene in barley


 M.M. AL-Hamdany, J.H. Jorgensen, M.M. Salih and I.A.AL-Dulaimi


  1993. Pages 65-72 In: Proc. Co-ordi./ICARDA  Workshop on Technology Transfer in the Production of Cereals and Legumes,Mosil-Iraq, 20-22/9/1992



          Powdery mildew resistance gene in the Mla locus was identified as Mla 13 in the spring barley line H-421. The resistance pattern of this line is characterized by its monogenic dominancy, but nearly universal resistance and by exhibiting the infection type 0/4 on seedling stage against 17 European isolates of mildew causing agent Erysiphe graminis f. sp. hordei. The same infection type was obtained when mix population of the causal agent were used in Iraq at different leaf stage of this line. Moreover, the plants of this line showed no mildew at all under field conditions neither in Iraq nor in Riso Station/Denmark. This line is now being successfully introduced in a breeding programme for mildew resistance in barley and is ready to be used in any breeding programme for mildew resistance.                                                                             


Key words: Barley, Powdery mildew, Source of resistance, Mla13

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