ARTIFICIAL SCREENING FOR BACTERIAL BLIGHT RESISTANCE AND VALIDATION OF MARKERS FOR MARKER-ASSISTEDSELECTION

摘要

Rice (Oryzasativa L.) is the most important food crop of the world. Breeding for resistance against Bacterial blight (BB), a destructive disease in rice, is a major challenge because of the rich diversity of the pathogen, Xanthomonasoryzaepv. oryzae.Rice genotypes viz., B95-1 X Abhaya (xalS), B95-1 X Tetep (Xa21), B95-1 X Kavya (Xa21), B95-1 X Aganni (Xa21), ADT38 and C043 were screened for bacterial blight resistance in artificial condition. The study indicated that the genes xal3 and Xa21 recordedresistance reaction to bacterial blight pathogen occurring in TamilNadu. Tightly linked markers xal3-prom and pTA248 are aviable for the genes xal3 and Xa21 respectively.