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 B76 is governed by single
dominant gene. The cultivar Kogyoku has two independently inherited dominant genes
for resistance. Asingle recessive gene confers resistancein line CNGS 20083. Studyof allelic
relationships showed that genes for BLB resistance in the cultivarsllines B76, 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 Xall.
Keywords: Pathotype, resistance, allelic relationship, bacterial leaf blight.
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906
R. P. SINGH, A. K. GUPTA AND R. G. SAIN info_circle