Department of Genetics, Punjab Agricultural University, Ludhiana 141004.
* Author for correspondence.
The inheritance of resistance and allelic relationships in three lines of rice, i.e. B 76, Kogyoku and CNGS 20083, was studied against pathotype IX08 of Xanthomonas oryzae pv. oryzae, causing bacterial leaf blight (BLB). The resistance of line B 76 is governed by single dominant gene. The cultivar Kogyoku has two independently inherited dominant genes for resistance. A single recessive geneconfers resistance in line CNGS 20083. Study of allelic relation ships showed that genes for BLB resistance in the cultivars/lines B 76, Kogyoku and CNGS 20083 are different. Crosses of the line B 76 with other genotypes having already known resistance genes demonstrated that B 76 contains gene(s) which are different than Xal, Xa3, Xa Kg (Xa12), Xa6, Xa7 and Xa11.
Pathotype, resistance, allelic relationship, bacterial leaf blight
