단백질 함량 증가 고품질 특수미 ‘드리미5호’ 육성

Breeding of a Rice Cultivar “Drimi5ho” with High Protein Content and High-Quality Specialty

Rice is a staple food in most countries, and thus, diversifying its value is necessary. Recently, the focus on good health has increased, and rice cultivars with improved properties should be bred based on consumer demands. At the Plant Molecular Breeding Laboratory of Kyungpook National University, “Hwayeong” was tissue-cultured to derive mutant populations. In the mutant lines, “P35” with high protein content and excellent agricultural traits, was backcrossed with “Ilmi” three times, and the final selected line was called “Drimi5ho.” The heading date of “Drimi5ho” was August 11 (107 d after sowing), which was 5 d later than that of “Ilmi” (August 5, 101 d after sowing). The culm length of “Drimi5ho” was 71 cm, the panicle length was 18 cm, the number of panicles per hill was 13, the number of spikelets per panicle was 113, the ratio of ripened grain was 90.5%, and the 1,000-grain weight was 22.6 g. When “Drimi5ho” was planted ordinary plantation, the yield in the southern mountainous area was 526 kg/10a. Lodging was not observed when “Drimi5ho” was grown in the field with standard fertilization (N-P2O5-K2O = 9-4.5-5.7 kg/10a). This rice cultivar was resistant to leaf/neck blast, bacterial blight (K1, K2, and K3), rice stripe virus, rice black-streaked dwarf virus, and rice dwarf virus. The milled grain of “Drimi5ho” was clear and transparent without any chalkiness; moreover, the grain shape was round and short. Although it is a specialty rice with increased protein content, the taste of the rice and the grain quality were excellent (Registration No. 6829).