Barley Isolines with Genes for Resistance to Erysiphe graminis f. sp. hordei in the Recurrent Parent ‘Siri’

A group of 17 spring barley isolines with genes for race specific resistance to barley powdery mildew were developed by backcrossing using the cultivar ‘Siri’ as the recurrent parent. A test with 22 isolates of powdery mildew showed that each of the 17 isolines had the same reaction as its donor parent, and that 17 different resistance genes or gene combinations are present among the lines‐ The isolines are very similar to ‘Siri’ in morphology and agronomic performance.