Genome-Wide Association Study of Rice Core Set Related to Grain Weight

Rice is being consumed in over 50% of the world s population, and it is main food in Korea. Many accessions of rice have been utilized for breeding purposes such as the use for functional food, disease resistance, improved quality and yield. In this study, the 1000-grain weight, one of important components for yield in rice, was investigated and analyzed by conducting a genome-wide association study (GWAS) using whole genome SNP genotype data on 295 Korean rice core sets. Four genes, Os01g0315700, Os03g0604566, Os04g0413500 and Os05g0216950, are significantly associated with 1000-grain weight. We presume carefully that the function of these kind genes will help in the selection of intermediate parents with high yield and genetic markers to develop new varieties.