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The USDA Genetic Stocks – Oryza (GSOR) Collection at DBNRRC serves as distribution center for genetic mutants and molecularly characterized genetic resources that are important to the rice research community. These genetic stocks have been created using specialized techniques such as induced mutation and cross-breeding.  The GSOR program is responsible for storing, maintaining, documenting, and distributing (free of charge) these materials to the scientific community for use in genetic and genomic research. Ultimately these materials will aid in the understanding of the genetic control of traits that can be used to enhance the development of new cultivars that meet the needs of the U.S. rice industry

Contact the GSOR by telephone at 870-672-6140 or email at 
Search and request National Small Grains Collection (NSGC) using germplasm name or accession number.  Click here for instructions on searching/ordering through GRIN Global.
Be Successful Germinating Rice Seeds
Information about inventory coding system.
Recent publications using GSOR germplasm.
Please note that usually only small amounts of rice genetic stocks seeds are distributed.  You are encouraged to also look at the National Small Grains Collection (NSGC) for the same accession, where 5 grams of seed are distributed.  NSGC website: 


We request that the source of these rice accessions be acknowledged when used as a resource for research publications or cultivar development.  Suggested acknowledgement:  Rice accessions (Oryza sativa) were obtained from the USDA-ARS, Dale Bumpers National Rice Research Center, Stuttgart, Arkansas, Genetic Stocks Oryza Collection  (

Please see below a listing of available rice genetic stocks.  Additional information is provided at the linked web page in the name column.
Category Parental or set names Number of accessions Comment
Diverse germplasm set Core Collection 1794  
Diverse germplasm set Oryza SNP set 20 merged with RDP1 in 2013
Diverse germplasm set Rice Diversity Panel 1 (RDP1) 409  
Diverse germplasm set Rice Diversity Panel 2 (RDP2) 1333 SMTA required
Diverse germplasm set USA Rice Pedigree Panel 153  
Genetic Mutants Various, see list here 28  
Genetic stock Zhen Shan 97A and Zhen Shan 97B 2 Cytoplasmic male sterile and maintainer
Germplasm Nipponbare, GSOR 100 1 used as standard in genetic studies
Mapping population Cocodrie x MCR01-0277 327  
Mapping population Cypress x LaGrue 300 aka MY2 RiceCAP project
Mapping population Early x Katy 240  
Mapping population Estrela x NSFTV 199 282  
Mapping population Jefferson Near Isogenic Lines (NILs) 14 O. sativa x O. rufipogon
Mapping population Katy x M202 (BC5F3)  44 backcrossing population
Mapping population KBNT lpa1-1 x Zhe 733 355 aka K/Z population
Mapping population Lemont x Jasmine 85 574 aka SB5 RiceCAP project
Mapping population RT0034 x Cypress 219 aka MY1 RiceCAP project
Mapping population TeQing-into-Lemont (TILs) 125  
Mutant set California Mutant Collection 12  
Mutant set IR36 Rice Trisomic Lines 25  
Mutant set Jodon Mutant Collection 38  
Mutant set Katy Deletion Mutants 22842  
Mutant set Kinoshita Mutant Collection 191  
Mutant set Nipponbare TILLING Mutants 6397  

Contact the GSOR (Trevis Huggins) by telephone at 870-672-6140 or email at