A New High Qualilty Rice Variety with High Head Rice Ratio and Milling Recovery, "Chilbo"

완전미율, 도정수율 높은 중만생 고품질 벼 신품종 "칠보(七寶)"

  • Received : 2009.11.04
  • Published : 20091200

Abstract

A new commercial rice variety "Chilbo" is a japonica rice (Oryza sativa L.) with resistance to rice stripe virus and high grain quality. It was developed by the rice breeding team of Yeongdeog Substation, NICS, RDA in 2007. This variety was derived from a cross between "Yeongdeog 26" with wind tolerance and lodging resistance and "Koshihikari" with good grain quality. A promising line, YR21324-119-3-2 was selected by a pedigree breeding method and designated as "Yeongdeog 44" in 2004. Regional adaptation yield trials were carried out at eleven locations from 2005 to 2007. As a result, "Yeongdeog 44" was released as a high yielding rice variety with high grain qualilty and virus resistance with the name of "Chilbo". It is short 76cm in culm length and has medium-late growth duration. This variety is resistant to stripe virus and middle resistant to leaf blast disease. It is also tolerant to cold, dried wind. Milled rice kernel of "Chilbo" is translucent, clear in chalkiness. Panel test proved that and it has good eating quality. Head rice ratio of Chilbo is high compared to the check variety, Hwaseongbyeo. Yield potential of "Chilbo" in milled rice is about 5.57MT/ha at ordinary fertilizer level of local adaptability test. This variety would be adaptable to Yeongnam plain, south & east-south coastal, south mid-mountainous, middle plain area of Korean peninsula.

"칠보"는 국립식량과학원 영덕출장소에서 2007년에 육성한 쌀 품위가 좋고 밥맛이 양호하며 바이러스병에 강한 중만생 벼 품종으로 주요 특성과 수량성을 요약하면 다음과 같다. 1. 출수기는 평야지의 보통기 재배에서 8월 15일로 "화성벼"보다 3일 늦은 중만생종이다. 2. 주당수수는 18개로 "화성벼"보다 3개 많으며 수당립수는 적은 편이고 등숙비율은 더 높으며 현미천립중은 비슷한 중립종이다. 3. 심복백이 거의 없고 "화성벼"보다 맑고 투명하며 도정률 및 완전미율이 높고 아밀로스 및 단백질함량은 비슷하며 밥맛은 "화성벼"보다 양호하다. 4. 불시출수와 수발아가 않되는 편이고, 위조현상에 강하고 성숙기 엽노화가 느린 편이며 내냉성은 "화성벼"보다 출수지연은 심하고 임실률은 중정도이다. 5. 잎도열병은 중도저항성이며, 줄무늬잎마름병에는 강하나 흰잎마름병, 오갈병 및 검은줄오갈병에는 약하고 벼멸구 등 충해에는 감수성이다. 6. 쌀수량은 5.57 MT/ha로 "화성벼"보다 8% 증수 되었으며, 이모작재배에서는 5.33 MT/ha, 만식재배에서는 4.60 MT/ha의 수량성을 보였다.

Keywords

References

  1. Rural Development Administration. 2005. Summer crop joint research report of new varieties. pp. 38-167
  2. Rural Development Administration. 2006. Summer crop joint research report of new varieties. pp. 36-169
  3. Rural Development Administration. 2007. Summer crop joint research report of new varieties. pp. 35-189
  4. Rural Development Administration. 2007. New varieties selection review data of agricultural crop duty development (Rice field). pp. 100-111