RESPONSE OF DIVERSE RICE GERMPLASM TO BIOTIC AND ABIOTIC STRESSES
Location: Dale Bumpers National Rice Research Center
Title: Registration of four rice germplasm lines with improved resistance to sheath blight and blast diseases
Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: August 15, 2011
Publication Date: September 19, 2011
Citation: Jia, Y., Liu, G., Correa-Victoria, F.J., McClung, A.M., Oard, J.H., Bryant, R.J., Jia, M.H., Corell, J.C. 2011. Registration of four rice germplasm lines with improved resistance to sheath blight and blast diseases. Journal of Plant Registrations. 6(1):95-100.
Rice sheath blight (ShB) and blast caused by the fungal pathogens Rhizoctonia solani and Magnaporthe oryzae, respectively, are the two most serious diseases of rice worldwide. Four rice (Oryza sativa L.) germplasm lines designated as LJRIL103 (PI 660982), LJRIL158 (PI 660983), LJRIL186 (PI 660984), and LJRIL220 (PI 660985) were selected from among 256 recombinant inbred lines (RILs) derived from a cross of the US adapted cultivars Lemont (PI 475833) and Jasmine 85 (PI 595927). They are officially released by the U.S. Department of Agriculture, Agricultural Research Service and the University of Arkansas Agricultural Experimental Station in cooperation with the International Center for Tropical Agriculture (CIAT), Colombia, and Louisiana State University, Baton Rouge, Louisiana, U.S.A. These four RILs have resistance to ShB as determined in two greenhouse chamber assays and in inoculated field trials conducted in Stuttgart, AR; Beaumont, TX; and Crowley, LA in 2008 and 2009. They are also resistant to some blast races as determined in inoculated greenhouse tests. These LJRILs contain most of the ShB-QTL identified on chromosomes 1, 2, 3, 5, 6 and 9 and blast QTL identified on chromosomes 8, 9, 11, and 12 originating from the parents Jasmine 85 and Lemont. These four LJRILs have agronomic and grain quality characteristics comparable to both parents. These LJRILs can be used in rice breeding programs for pyramiding both ShB and blast resistance genes.