논문 상세보기
pp.174-179
국내 주요 해충인 끝동매미충에 대한 저항성 품종‘청남’은 ‘기누히까리’와 ‘밀양189호’를 각각 모본과 부본으로 인공교배 한 후 약배양으로 육성하였으며, 주요 연구결과는 아래와 같다. 출수기는 평야지 보통기 재배에서 8월 11일로 중생종이며 수당립수는 ‘남평벼’보다 적은 편이고 현미천립중은 무거운 편이다. 불시출수는 발생하지 않았으며, 수발아는 ‘남평벼’보다 약간 높은 편이고, 포장도복은 없었으며, 내냉성은 ‘남평벼’와 비슷하다. 잎도열병 밭못자리 검정 중 정도 저항성을 보였으며, 줄무늬잎마름병과 흰잎마름병(K1, K2, K3)에는 강하며, 바이러스병을 매개하는 끝동매미충에 저항성으로 오갈병에 포장저항성을 나타낸다. 검은줄오갈병에 약하고 벼멸구 등 충해에는 감수성이다. ‘청남’의 끝동매미충 유전분석을 수행한 결과 1개의 단순우성유전자에 의해 지배됨을 확인하였다. ‘청남’의 쌀은 맑고 투명하며 완전미율이 높았으며, 밥맛은 양호한 편이다. ‘청남’의 수량성은 2007년부터 2009년까지 3년간 실시한 지역적응시험 보통기 보비재배 11개소에서 5.43 MT/ha, 이모작재배에서는 5.00 MT/ha, 만식재배에서는 5.18 MT/ha이었다.
Demands on environmentally friendly rice varieties as a primary food source and functional value are gradually increasing in recent rice consumer markets. Thus, multiple disease and insect resistance rice cultivar with good eating quality is essential in safe rice production. To cope with this situation, the rice breeding team of the Department of Functional Crop, NICS, RDA in 2009 released a new rice cultivar ‘Cheongnam’ which is resistant to rice green leafhopper (GRH). The anther culture method was employed for the developement of ‘Cheongnam’ which is derived from a cross of ‘Kinuhikari’ and ‘Milyang 189’ as a source of GRH resistant. Individual F2 plants of ‘Cheongnam’ / ‘Junam’ were classified as resistance or susceptible based on the survival ratio of GRH nymph. A total of 159 F2 plants from ‘Cheongnam’ / ‘Junam’ inoculated with GRH segregated into 116 resistant, and 43 susceptible plants, which fit to a 3:1 ratio and (χ2 = 0.38, df = 1, p = 0.54), suggesting the inheritance of a dominant gene for resistance. Heading date of ‘Cheongnam’ is August 11 as mid maturing ecotype. In the major agronomic characteristics of ‘Cheongnam’, number of spikelet/panicle was slightly low while 1,000 grain weight of brown rice was heavier as compared those of ‘Nampyeongbyeo’. The grain appearance, palatability and other items were more or similar to those of ‘Nampyeongbyeo’ in panel test of cooked rice. The milled rice yield of ‘Cheongnam’ is 5.43 MT per ha, 5.00 MT per ha and 5.18 MT per ha at the ordinary transplanting, double-crop system, and late transplanting of the local adaptability test, respectively. Thus, ‘Cheongnam’ would be a suitable cultivar to the mid and southern plain area, especially in environmentally friendly agricultural production area where rice stripe and dwarf virus as well as bacterial blight are frequent.
