아열대 지역 적응 자포니카 중간모본 밀양375의 주요 농업 적 특성 및 품질관련 특성을 분석한 결과는 아래와 같다. 1. 아열대지역인 국제미작연구소에서 밀양375는 파종 후 85 일에 출수하였다. MS11보다 11일정도 늦었고, 아열대지역의 표준품종인 IR64호와 비슷하였다. 2. 주요 농업적 특성 및 수량성을 분석한 결과는 밀양375의 간장은 74.9 cm로 자포니카 품종인 MS11보다 약 5.2 cm 정도 큰 편이였고, 쌀수량은 346 kg/10 a로 MS11의 수량 262 kg/10 a보다 32% 증수되었고, IR64의 수량 337 kg /10 a와 비숫하였다. 3. 주요 품질관련 특성을 분석한 결과, 밀양375는 장폭비 1.78정도의 단원립이면서, 단백질 함량이 낮고, 아밀로스 함량 이 낮아 찰기가 양호하며, 밥의 윤기가 높은 계통이였다. 4. 주요 농업적 특성의 상관분석 결과 쌀수량과 출수기 (0.899). 수당립수(0.851), 간장 (0.832) 및 수장(0.685) 순으로 정의 상관관계를 나타내었고, 수수와 천립중은 부의 상관관계를 나타내었다. 5. phylogenetic tree를 분석한 결과는 밀양375는 국내 육성 자포니카 중만생종과 같은 그룹으로 분류되었으며, 아열대 지역 적응 자포니카 품종인 MS11과 다른 그룹으로 분류되었다. 따라서, 아열대 지역 자포니카 품종 육성을 위한 새로운 중간 모본으로 활용성이 높은 것으로 판단된다.

Bakanae disease is one of the most serious and oldest problems of rice production, which was first described in 1828 in Japan (Ito and Kimura 1931). This disease may infect rice plants from the pre-emergence stage to the mature stage, with severe infection of rice seeds resulting poor germination or withering (Iqbal et al. 2011). Under favorable environmental conditions, infected plants have the capacity to produce numerous conidia that subsequently infect proximate healthy plants, resulting in major yield loss (Ou 1985). One hundred sixty nine NILs, YR28297 (BC6F4) generated by five backcrosses of Shingwang with the genetic background of susceptible japonica variety, Ilpum were used for QTL analysis. Rice bakanae disease pathogen, CF283, was mainly used in this study and inoculation and evaluation of bakanae disease was performed with the method of the large-scale screening method developed by Kim et al. (2014). A major QTL for resistance against bakanae disease on chromosome 1 was identified using SSR marker, RM9, which explaining 65 % of the total phenotype variation. The major QTL designated as qBK1 and mapped to a 4.4 Mbp region between RM24 (19.30 Mb) and RM11295 (23.72 Mb). The results of this study are expected to provide useful information toward developing resistant rice lines to this detrimental fungal disease.

Bakanae disease incidence threat is an increasing trend in the top rice growing countries. Despite it is essential to identify the resistant genes and underlying mechanisms of bakanae disease to develop resistant varieties, there are very limited genetic studies on bakanae disease in rice. The indica rice variety Shingwang was selected as resistant donor to bakanae disease. One hundred sixty nine NILs, YR28297 (BC6F4) generated by five backcrosses of Shingwang with the genetic background of susceptible japonica variety, Ilpum were used for QTL analysis. Rice bakanae disease pathogen, CF283, was mainly used in this study and inoculation and evaluation of bakanae disease was performed with the method of the large-scale screening method developed by Kim et al. (2014). The proportion of healthy plants of Shingwang and Ilpum after inoculation was confirmed using bakanae disease pathogen, CF283. While inoculated Ilpum showed thin and yellowish-green phenotype which is typical symptom of Bakanae disease, Shingwang showed similar healthy phenotype with control plants. A major QTL for resistance against bakanae disease on chromosome 1 was identified using SSR marker, RM9, which explaining 65 % of the total phenotype variation. The major QTL designated as qBK1 and mapped to a 4.4 Mbp region between RM24 (19.30 Mb) and RM11295 (23.72 Mb). The information of qBK1 could be useful for improving rice bakanae disease resistance in marker-assisted breeding.