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SUPER MILDEW RESISTANCE GENE IN BARLEY

M. A. Al-Hamdany                               J. H. Jorgenson*

M. M. Salih                                          I. A. Al-Dulaimi

Department of Plant Breeding, Center of Agriculture and Biological Researches, Baghdad, Iraq

<!--Riso National Laboratory, Roskilde,Denmark      

Abstract

     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. by nearly universal resistance and by exhibiting the infection types 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 stages of this line. Moreover, the plants of this line showed no mildew at all at field conditions nether in Iraq nor in Riso Station in Denmark. The line now is successfully being introduced in a breeding program for powdery mildew resistance in barley and it’s ready to be used in any breeding programme for mildew resistance.