Virulence / aggressiveness testing of Xanthomonas oryzae pv. oryza isolates causes BLB disease in rice cultivars of Pakistan

摘要

In present study, virulence and aggressiveness of seven Xanthomonas oryzae hypersensitive isolates, (Xoo 20, Xoo 36, Xoo 51, Xoo 65,Xoo 74, Xoo 99 and Xoo 105) were tested on seven rice varieties (Basmati 385, IRRI 26, Basmati 386, Dilroosh 97, JP 5, Super Basmati,Basmati 2000 and Ks 282), through detached leaf, glass house and field assays Xoo 99 showed most aggressive reaction on detached leaves andXoo 105 exhibited more aggressive reaction on glass house plant and field assay as compared to other isolates. Moreover, all rice tested cultivarsshowed susceptibility against isolates of BLB disease, Basmati 385 were showed more susceptible reaction.