벼흰잎마름병 저항성 유전자 Xa2, Xa3, xa5, Xa21 보유자포니카 조생 찰벼 계통 육성
Development of Breeding Lines for Early Maturing Glutinous japonica Rice carrying Bacterial Blight Resistance Genes, Xa2, Xa3, xa5, and Xa21
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초록
This study was conducted to develop breeding lines carrying bacterial blight resistance genes, Xa2, Xa3, xa5, and Xa21for enhancing the resistance of early maturing glutinous japonica rice. Resistant lines were developed by backcrossing into earlymaturing glutinous elite cultivar, Sangjuchalbyeo and phenotypic selection for bacterial blight resistance and agronomic traits. Selected lines were confirmed the incorporation of the resistance genes using DNA markers and evaluated the resistance reactionagainst four Korean and eleven Philippine bacterial bight races. HR24465 line carrying Xa2 was resistant to Korean races K1,K2, and Philippine race 9a. HR24666 line carrying Xa3 was moderately resistant or resistant to races except for Korean raceK3a and Philippine race 6. Resistant lines carrying xa5 were resistant to all races except for Philippine race 6. HR24669 linecarrying Xa21 was moderately resistant or resistant to races except for Korean race K1 and Philippine race 10. Yield-related traitsof breeding lines exhibited similar characteristics to Sangjuchalbyeo. These resistant lines could be useful breeding materials forimproving the resistance of early maturing glutinous japonica rice against Xanthomonas oryzae pv. oryzae.
Abstract
This study was conducted to develop breeding lines carrying bacterial blight resistance genes, Xa2, Xa3, xa5, and Xa21for enhancing the resistance of early maturing glutinous japonica rice. Resistant lines were developed by backcrossing into earlymaturing glutinous elite cultivar, Sangjuchalbyeo and phenotypic selection for bacterial blight resistance and agronomic traits. Selected lines were confirmed the incorporation of the resistance genes using DNA markers and evaluated the resistance reactionagainst four Korean and eleven Philippine bacterial bight races. HR24465 line carrying Xa2 was resistant to Korean races K1,K2, and Philippine race 9a. HR24666 line carrying Xa3 was moderately resistant or resistant to races except for Korean raceK3a and Philippine race 6. Resistant lines carrying xa5 were resistant to all races except for Philippine race 6. HR24669 linecarrying Xa21 was moderately resistant or resistant to races except for Korean race K1 and Philippine race 10. Yield-related traitsof breeding lines exhibited similar characteristics to Sangjuchalbyeo. These resistant lines could be useful breeding materials forimproving the resistance of early maturing glutinous japonica rice against Xanthomonas oryzae pv. oryzae.
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