Genetics of resistance in wheat against the cereal cyst nematode, Heterodera avenae Woll.

Abstract

The genetics of resistance of wheat to Heterodera avenae was studied with respect to F1, F2, and backcross progenies of cross combinations Raj 1482 × CCNRV 4, Raj 1482 × Raj MR 1, and Raj 1482 × AUS 15854. All F1 were found resistant to cereal cyst nematode and the F2 population segregated in a 3 resistant : 1 susceptible ratio. Thus, the resistance gene showed monogenic dominance over susceptibility. The back cross (test cross) segregated in a 1 resistant : 1 susceptible ratio, once again confirming the monogenic dominant nature of the resistance gene.