Abstract
The English grain aphid, Sitobion avenae (F.), is a destructive pest in common wheat (Triticum aestivum L.), and it appears in wheat production regions of China and other areas worldwide. Breeding resistant varieties are considered the most effective, economical and environmentally friendly approach to control S. avenae. The synthetic hexaploid wheat line XN98-10-35 showed resistant to S. avenae at all growth stages. To study the genetic control of the aphid resistance, XN98-10-35 was crossed with the susceptible line XN1376. A single dominant resistance gene was detected in BC1, F2, F2:3 and F3:4 genetic populations, temporarily designated as Sa2. By testing 180 F2 plants, 71 F2:3 lines and 16 BC1 plants, the resistance gene in XN98-10-35 was found to be closely linked to the simple sequence repeat markers Xgwm350 and Xbarc70 on wheat chromosome 7DS (deletion line 7DS-5) at genetic distances of 4.7 and 8.9 cM, respectively. It is concluded that Sa2 is a new resistance gene to S. avenae. Our study suggested that the two markers linked to Sa2 can be used in marker-assisted selection to develop new cultivars with resistance to S. avenae.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
