Inheritance of resistance to gall midge in some cultivars of rice

Inheritance of resistance to gall midge in five resistant rice cultivars was studied under conditions of natural infestation. All five cultivars were found to have a single dominant gene for resistance. Allele tests revealed that Usha, Samridhi, and Bd 6-1 have the same gene for resistance; this gene was designated Gm-1. Surekha and IET 6286 have the same gene for resistance, which is nonallelic to and independent of Gm-1; this gene was designated Gm-2