Magnesium is important not only for the growth of rice itself, but also as an essential micronutrient component of half of the world population who are supported by rice. Here, we performed genome-wide association study (GWAS) with high-resolution density SNPs to identify natural allelic variation in Mg2+ increase from rice set, which is derived from a total 24,368 rice germplasms. The range of the concentration and distribution of Mg2+ in 295 core accessions of brown rice grain were wide, from 18.17mg/L to 57.11mg/L, with mean 39.71mg/L. In particular, GWAS result shows that the high peak found on chromosomes 3 and 11. The new natural variants identified through haplotyping analysis would be useful to develop new rice varieties with improved storage ability of the valuable mineral through the future molecular breeding.

• 허은범(공주대학교 산업과학대학 식물자원학과) | Eun-Beom Heo (Department of Plant resources, Kongju National University)
• 유지민(공주대학교 산업과학대학 식물자원학과) | Ji-Min Yoo (Department of Plant resources, Kongju National University)
• 이원도(주식회사 시드피아) | Won-Do Lee (Seedpia Inc)
• 추상호(공주대학교 작물 오믹스지능육종 연구센터) | Sang-Ho Chu (Center of Crop Breeding on Omics and Artificial Intelligence, Kongju National University)
• 김규원(공주대학교 작물 오믹스지능육종 연구센터) | Kyu-Won Kim (Center of Crop Breeding on Omics and Artificial Intelligence, Kongju National University)
• 조유현(주식회사 시드피아) | Yoo-Hyun Cho (Seedpia Inc)
• 박용진(1공주대학교 산업과학대학 식물자원학과, 3공주대학교 작물 오믹스지능육종 연구센터) | Yong-Jin Park (1Department of Plant resources, Kongju National University, 3Center of Crop Breeding on Omics and Artificial Intelligence, Kongju National University) Corresponding author