A Medium-Maturing and Good Quality Japonica Rice Variety, "Cheongan"

벼 중생 고품질 신품종 "청안"

  • 양세준 (농촌진흥청 국립식량과학원) ;
  • 김연규 (농촌진흥청 국립식량과학원) ;
  • 최임수 (농촌진흥청 국립식량과학원) ;
  • 조영찬 (농촌진흥청 국립식량과학원) ;
  • 황흥구 (농촌진흥청 국립식량과학원) ;
  • 홍하철 (농촌진흥청 국립식량과학원) ;
  • 김명기 (농촌진흥청 국립식량과학원) ;
  • 오명규 (농촌진흥청 국립식량과학원) ;
  • 신영섭 (농촌진흥청 국립식량과학원) ;
  • 이점호 (농촌진흥청 국립식량과학원) ;
  • 최용환 (농촌진흥청 국립식량과학원) ;
  • 최인배 (농촌진흥청 국립식량과학원) ;
  • 강경호 (농촌진흥청 국립식량과학원) ;
  • 예종두 (농촌진흥청 국립식량과학원) ;
  • 이정희 (농촌진흥청 국립식량과학원)
  • Received : 2009.12.16
  • Published : 20091200

Abstract

"Cheongan" is a new japonica rice variety developed from a cross between SR15225-B-22-1-2-1 and Iksan431 in summer season, 1997 by National Institute of Crop Science, RDA. The line SR15225-B-22-1-2-1 has good canopy architecture and multi-disease and insect resistance, and Iksan431 has translucent milled rice and good eating-quality. Heading date of Cheongan is August 13 in central lowland and mid-mountainous areas. "Cheongan" having culm length of 84 cm shows relatively semi-erect pubescent leaf blade and rigid culm, tolerance to lodging with and good canopy architecture. This variety has 14 tillers per hill and 126 spikelets per panicle. It shows tolerance to heading delay and spikelet sterility comparable to Hwaseongbyeo when exposed to cold stress. Leaf senescence of Cheongan progresses slowly during the ripening stage and the viviparous germination ratio was 59 %, similar to that of Hwaseongbyo. "Cheongan" shows moderately resistance to blast disease, but susceptible to stripe virus and brown planthopper. The milled rice of "Cheongan" exhibits translucent, clear non-glutinous endosperm and medium short grain. It shows similar amylose content of 18.7%, gelatinization temperature, and similar palatability of cooked rice compared to Hwaseongbyeo. The milled rice yield of this cultivar is about 5.54 MT/ha at ordinary season culture in local adaptability test for three years. Especially, "Cheongan" has better milling properties of higher 98.4% and 73.9% in the percentage of head rice in milled rice and milling recovery of head rice, respectively, than those of Hwaseongbyeo. "Cheongan" could be adaptable to the central and mid-southern plain area, and mid-western coastal area of Korea.