Registration of the MY2 Cypress/LaGrue Rice Recombinant Inbred Line Mapping Population

Grain quality plays a crucial economic role for rice (Oryza sativa L.) producers, millers, manufacturers of conventional and convenience foods, and exporters to international markets. No rice genetic population based on O. sativa L. ssp. tropical japonica germplasm is publically available to investigate the genetics of grain quality and associated agronomic traits. The objective of this research was to develop a japonica-based rice recombinant inbred line (RIL) mapping population to assist in the identification of genomic regions associated with whole-grain milling (head rice), five additional seed-related characters, and two agronomic traits. The Cypress/LaGRue mapping population (GSOR Reg. 101001 to 101300) was developed under the Rice Coordinated Agricultural Project (RiceCAP) and released by the Louisiana State University Agricultural Center, Baton Rouge, LA, in 2009. The mapping population consisted of 298 F2:6 recombinant inbred lines (RILs) from which a linkage map was constructed using simple sequence repeat (SSR) markers to identify quantitative trait loci (QTL) underlying the above mentioned traits. To complement the SSR marker information, DNA sequence of the two parental nuclear genomes at 5X-fold coverage has been determined and made available online. In addition, a separate database consisting of single nucleotide polymorphisms (SNPs) between the two parents has been posted at a public website. This mapping population and related datasets represent a valuable resource for basic rice genomic and applied marker-assisted breeding efforts in grain quality and associated traits.