재배안정성이 향상된 중생 다수성 적갈메 ‘다홍미’

‘Dahongmi’, a Mid-Maturing, High-Yielding, Red-brown Colored Rice Cultivar with Improved Cultivation Stability

‘Dahongmi’ was developed to enhance the quality of colored rice by crossing ‘Jeogjinju’, Korea’s red-brown colored rice variety,with ‘Junam’, a variety known for excellent cultivation characteristics. ‘Dahongmi’ is a mid-maturing cultivar harvested approximately 15days later than ‘Jeogjinju’, suitable for the mid-central plains. Each ‘Dahongmi’ plant bears 14 panicles, similar to that in ‘Jeogjinju’ butwith an additional 22 grains per panicle and a heavier 1000-grain weight compared to that of ‘Jeogjinju’. ‘Dahongmi’ exhibited superiorlow-temperature germination rate (85.1%) and a higher percentage of fertile grains at a cold-water irrigated nursery (36.2%) compared to‘Jeogjinju’. The stem height of ‘Dahongmi’ is 89.7 cm, similar to that of ‘Jeogjinju’. However, ‘Dahongmi’ has a third node height 9 cmshorter than that of ‘Jeogjinju’, enhancing its resistance to lodging. Furthermore, it displayed resistance to leaf blast, bacterial leaf blight (K1,K2, and K3 strains), and rice stripe virus, ensuring stability during cultivation. The protein and amylose content of ‘Dahongmi’ are 5.5%and 18.9%, respectively, similar to that of ‘Jeogjinju’ (5.9%, 18.3%). The levels of antioxidant components such as total polyphenols andflavonoids are comparable to that of ‘Jeogjinju’. However, ‘Dahongmi’ does not exhibit resistance against bacterial leaf blight strain K3aand delphacidae, underscoring the importance of timely and balanced fertilization for effective early-stage management. ‘Dahongmi’ exhibitsbetter yield, straw strength, and plant architecture compared to ‘Jeogjinju’. It has immense potential for augmenting the yield ofhigh-antioxidant-pigmented rice varieties. In addition, it could provide valuable foundational data for the brown rice processing industry(Registration Number: 8680).