To evaluate the resistance to wheat powdery mildew of the wheat varieties(lines) from regional trial in Shaanxi province during 2015-2016 crop season,32 wheat varieties(lines) carried the known resistance genes and 228 varieties(lines) from regional trial were tested in the disease nursery at seedling stage and adult stage,with the methods of artificial inoculation and natural infection,respectively.Samples of powdery mildew were collected from different locations in Shaanxi province. The results showed that resistance genes of Pm4a, Pm4b, Pm13, Pm17, Pm18, Pm19, Pm21, Pm24, Pm30, Pm2+6, Pm2+Mld, Pm2+6+?, Pm5+6 and Pm“XBD” were immune or highly resistant to wheat powdery mildew,and Pm3a, Pm3b, Pm6, Pm4+8, Pm4b+Mli and Pm4+2+? showed weak resistance and the rest of resistance genes were susceptible. Among 228 regional trial varieties(lines),14 varieties(lines) were resistant both at seedling stage and adult stage,and 33 varieties(lines) were resistant only at adult stage,accounting for 6.14% and 14.47%,respectively. Most of these varieties(lines) were susceptible to wheat powdery mildew. |