Scientists from the International Rice Research Institute (IRRI) have identified the genes responsible for low and ultra-low glycemic index (GI) in rice. This discovery will allow the conversion of popular rice varieties into low and ultra-low GI for refined white rice, through conventional breeding methods, keeping high-quality grain without compromising yield.
The first batch of ultra-low GI rice samples that IRRI developed from the Samba Mahsuri x IR36ae, was formally presented to Philippine President Ferdinand Marcos, Jr. during the opening ceremony of the 6th International Rice Congress held in Manila, Philippines, on October 16, 2023.
IRRI has previously identified two low GI Philippine rice varieties, IRRI 147 and IRRI 125, that were already released in the Philippines as salt-tolerant varieties. Based on clinical validation on human volunteers in a cohort study, IRRI 147 depicted a GI value of 55, and IRRI 125 had a GI value of 51.1.

(Source: Crop Biotech Update, International Service for Acquisition of Agri-Biotech Applications.