Genetic analysis of resistance to green leafhopper Nephotettix virescens (Distant) in some selected rice varieties

Abstract

The genetics of resistance to green leafhopper, Nephotettix virescens (Distant), in 15 cultivars of rice, Oryza sativa L., was studied. Results showed that cvs Katia Bagder 13-20, Laki 659, Lasane, Asmaita, and Choron Bawla possess two dominant genes for resistance. Single dominant genes convey resistance in cvs Hashikalmi, Tendeng, Rhissa, Ghaiya, ARC 10313, Chiknal, Garia, Bagdar and Chota Digha. Allele tests revealed that one of the two dominant genes of Choron Bawla is allelic to Glh-2. The single dominant gene in Chiknal and one of the two genes of Laki 659 are allelic to Glh-3. The second of the two genes of Katia Bagder 13-20, Laki 659 and Lasane are allelic to Glh-5. The two dominant genes of Asmaita and the single dominant genes of Hashikalmi, Ghaiya, ARC 10313 and Garia are non-allelic to and independent of Glh-1, Glh-2, Glh-3, glh-4 and Glh-5. The allelic relationships of these genes are not known and should be investigated.