“…One option for breeding barley, especially winter cultivars, against powdery mildew attack is accumulating (pyramiding, stacking) nonhypersensitive, nonspecific quantitatively inherited resistance genes [ 110 , 115 , 116 , 117 , 118 ] originating from cultivars as well as landraces [ 119 ] and wild barley [ 97 , 98 , 120 , 121 , 122 , 123 , 124 ]. Although not all quantitative genes are necessarily nonspecific, this way shows promise.…”