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Response of Resistance Gene to Korean Bacterial Blight Races in IRBB Lines KCI 등재
- 언어ENG
- URLhttps://db.koreascholar.com/Article/Detail/319780
Currently, more than 33 resistance gene against bacterial blight(BB) have been identified and used to develop resistant cultivar. IRRI developed near isogenic lines carrying monogenic resistance gene and pyramided genes, IRBB lines. This study was conducted to identify the response of resistance gene to Korean bacterial blight races(K1, K2, K3, and K3a) in IRBB lines. Xa1(IRBB1) was resistant to K1 race and Xa2(IRBB2) was resistant to K1 and K2 race. Xa3(IRBB3 and IRBB203) exploited in many breeding programs in Korea were resistant to K1, K2, and K3 race but susceptible to K3a. Xa4(IRBB4 and IRBB204), xa5(IRBB5 and IRBB205), Xa7(IRBB7 and IRBB207) were resistant to four races. xa8(IRRR8) and Xa11(IRBB11 and IRBB211) showed same reaction of Xa2, resistant to K1 and K2. Xa10(IRBB10 and IRBB210), xa13(IRBB13), Xa14(IRBB14 and IRBB214) showed same reaction of Xa1, resistant to K1. Xa21, identified from the wild rice, Oryza longistaminata, is highly resistant to a broad spectrum of Xoo races. In this study, Xa21 was resistant to K2, K3, and K3a but susceptible to K1 widely spreading in Korea. So, Xa21 may be vulnerable to Korean bacterial blight. But pyramided lines with Xa21 showed high level of resistance to all races of Korea. Pyramided lines with Xa4 which conferred durable resistance in many commercial rice cultivar, xa5 which provides recessive resistance, and other resistance genes showed high level of resistance to Korean bacterial blight races.
