Submitted to: American Phytopathology Society
Publication Type: Proceedings
Publication Acceptance Date: July 15, 2008
Publication Date: July 22, 2008
Citation: Jia, Y., Liu, G., McClung, A.M. 2008. Development of the recombinant inbred line population of tropical japonica Lemont crossed with indica Jasmine 85. American Phytopathology Society 98:S75. Technical Abstract: A recombinant inbred line (RIL) population of rice is routinely used in studying agronomically important genes, and is particularly useful for analyzing quantitative trait loci (QTL) since phenotypes can be assessed over years. Jasmine 85, a midseason aromatic long-grain indica rice cultivar developed at the International Rice Research Institute, Philippines, is resistant to the common US races of M. oryzae, IA45, IB1, IB49, IC17, ID1, IG1 and IH1, susceptible to IB54; resistant to Rhizoctonia solani; resistant to Cercospora oryzae and Entyloma oryzae, and susceptible to Burkholderia glumae and ‘straighthead’-the physiological disorder. Lemont, an early maturing, semi-dwarf tropical japonica cultivar commercially grown in the southern US from 1980’s to 1990’s, is resistant to IA45, IB45, IB54, IG1 and IH1, susceptible to IB1, IB45, IB49, IC17, resistant to B. glumae, susceptible to C. oryzae and R. solani. A total of more than 800 RILs of the cross of Lemont with Jasmine 85 are being advanced to the F8-9 generation using single seed descend in a greenhouse. A subset of 256 RILs was genotyped using 199 simple sequence repeat (SSR) markers, and a high density SSR linkage map has been constructed representing a total of 1684.2 cM of genetic distance at an average of 8.5 cM between two markers. This mapping population should be useful for the rice scientific community. Limited seeds can be obtained by writing to Dr. Yulin Jia (Yulin.Jia@ARS.USDA.GOV) at Dale Bumpers National Rice Research Center.