Promising medium duration multiple resistant rice culture CB 05 022

Abstract

CB 05022, the medium duration rice culture with the parentage of CO 43/ ADT 39 was developed at Department of Rice, TNAU, Coimbatore. The culture was evaluated at station trials and it gave 21.8% increased yield over ADT (R) 46. This culture was evaluated under AICRIP in irrigated transplanted low land ecosystem as IET 20884 for two years 2006-2008. Under IVT-IM the culture recorded a mean grain yield of 5485 kg/ha which was 21, 22% increase over the checks Jaya and Triguna respectively. Again the culture was tested under IVT-L during kharif 2009 wherein it recorded a mean grain yield of 5551 kg/ha which was 11.4% increase over Savitri. In the region wise performance, this culture ranked first in Eastern region and fifth in Western region. In overall basis, it ranked second among all entries. The culture was also tested under Disease Screening Nursery during 2009 and it showed multiple disease resistance again leaf blast, neck blast and brown spot. The culture is having good quality characteristics of intermediate amylose and GT, soft GC, high milling (70.7%) and head rice recovery (60.6). The culture is now under third year of testing under AICRIP. Owing to high yielding, multiple resistance to major diseases, this culture has great scope for exploitation under our varietal improvement programmes.