Abstract
Schizaphis graminum is one of the most important pests that infect wheat, causing great losses to the crop, This study included the detection of sensitive and resistant of some cultivars wheat to greenbug infestation as well as, the detection Gb 8 gene and Gb 3 gene which are responsible for the appearance of resistance in some wheat cultivars against wheat greenbug using two DNA primers. Four cultivars of wheat were used in the study, which is as follows Jehan, Oneha, Wafih, and Babil, The results showed that Oneha variety was the most sensitive cultivars, also the resistance gene Gb 8 gene was presented in Jehan and Babil cultivars while, DNA bands of Gb 3 gene appeared in Jehan, Wafih and Babil cultivars. The detection of greenbug resistance genes in wheat will help in accelerating the breeding program in the future.
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