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SB5 Mapping population
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A mapping population developed from a cross of rice (Oryza sativa L.) tropical japonica cultivar 'Lemont' and indica cultivar 'Jasmine 85' was developed to facilitate genetic studies for important agronomic traits. The indica- and tropical japonica-based rice recombinant inbred line (RIL) mapping population has been used to identify genomic regions associated with resistance to sheath blight (Rhizoctonia solani) and rice blast (Magnaporthe oryzae) diseases.


The Lemont/Jasmine 85 mapping population, identified as GSOR 101601-102174, was developed under the Rice Coordinated Agricultural Project (RiceCAP) and released on August 31, 2009 by USDA ARS and University of Arkansas, Division of Agriculture. 


The RiceCAP project was active during 2004 through 2007.  


The mapping population has 572 F2:8 RILs, 256 of which were used to construct a linkage map using simple sequence repeat (SSR) markers to identify quantitative trait loci (QTL) for sheath blight and blast resistance.  This mapping population and related datasets represent a valuable resource for basic rice genomic research and applied marker-assisted breeding efforts in disease resistance and other agronomic traits.


Picture was taken at Stuttgart, AR, 2014. A blast susceptible tropical japonica rice germplasm was infected with blast fungus (Magnaporthe oryzae).

Picture was taken at Crowley, LA, 2014. A sheath blight susceptible URRN line was infected with sheath blight fungus (Rhizoctonia solani).


Click here to see the supplemental table of information which includes sheath blight rating, agronomic data and SSR marker data.


Please contact the GSOR at for information on ordering accessions from the SB5 Mapping population.