벼 흰잎마름病 低抗性 Near-isogenic lines의 國內 菌株에 대한 評價 = Evaluation of Near-Isogenic Rice Lines for Bacterial Blight Resistance to Korean Isolates of Xanthomonas Oryzae pv. oryzae

국문 초록 (Abstract)

IRRI에서 育成한 벼 흰잎마름病 抵抗性 near-isogenic lines의 國內 菌株에 대한 反應을 生育時期別로 評價한 結果는 다음과 같다.
1. Xa-1 遺傳子를 갖는 NIL은 K1 race에 속하는 HB 9298 菌株에 대해 抵抗性 反應을 나타내었고, Xa-2 遺傳子를 갖는 NIL은 K2 race에 속하는 HB 9223 菌株에 대해 抵抗性 反應을 나타내었다.
2. Xa-3 遺傳子를 갖는 NIL은 HB 9298 및 HB 9223 菌株에 대해 出穗期때 抵抗性 反應을 나타내었고 成體抵抗性이 認定되었다.
3. Xa-4, xa-5 및 Xa-7 抵抗性 遺傳子를 各各 갖는 NIL은 HB 9298 및 HB 9223 菌株에 대해 出穗期때 抵抗性 反應을 나타내었고 幼苗期와 最高分蘗期설의 反應은 反復親에 따라 相異하였다.
4. xa-8 및 Xa-11 抵抗性 遺傳子를 各各 갖는 NIL은 HB 9298 및 HB 9223 菌株에 대한 抵抗性 反應이 反復親에 따라 相異하였고 一定한 傾向이 없었다.
5. Xa-10을 갖는 NIL은 HB 9298 및 HB 9223 菌株에 대해 모든 生育時期에 罹病性을 나타내었다.

다국어 초록 (Multilingual Abstract)

This study was conducted to evaluate the reaction of near-isogenic rice lines with single genes for bacterial blight resistance to two Korean isolates of Xanthomonas oryzae pv. oryzae belong respectively to K1 and K2 race at different growth stage.
The results obtained were summaried as follows;
1. Near-isogenic rice lines with Xa-1 gene showed resistance to HB 9298 isolate belong to K1 race and near-isogenic rice lines with Xa-2 gene showed resistance to HB 9223 isolate belong to K2 race at different growth stage respectively.
2. Near-isogenic rice lines with Xa-3 gene showed resistance to HB 9298 and HB 9223 isolates at flowering stage and adult resistance was recognized in these lines.
3. Three near-isogenic rice lines with Xa-4, xa-5 and Xa-7 gene respectively showed resistance to HB 9298 HB 9223 isolates at flowering stage and the reactions of three lines to above two isolates were different each other according to recurrent parents at seedling stage and maximum tillering stage.
4. Two near-isogenic rice lines with xa-8 and Xa-11 gene respectively showed different reactions to HB 9298 and HB 9223 isolates according to recurrent parents and did not show constant tendency.
5. Near-isogenic rice lines with Xa-10 gene showed susceptability to HB 9298 and HB 9223 isolates at different growth stage.