首页|期刊导航|中国农业科学（英文版）|Virulence of Xanthomonas oryzae pv.oryzae on Rice Near-lsogenic Lines with Single Resistance Gene and Pyramiding Lines in China
中国农业科学（英文版）2004，Vol.3Issue(10)：764-769,6.
Virulence of Xanthomonas oryzae pv.oryzae on Rice Near-lsogenic Lines with Single Resistance Gene and Pyramiding Lines in China
Virulence of Xanthomonas oryzae pv.oryzae on Rice Near-lsogenic Lines with Single Resistance Gene and Pyramiding Lines in China
摘要
Abstract
Ninety one isolates of Xanthomonas oryzae pv. Oryzae were collected from different rice growing regions in China and determined for their virulence on 24 rice near-isogenic lines containing single resistance gene and 2-4 genes:IRBB1 (Xa1),IRBB2 (Xa2),IRBB3 (Xa3), IRBB4 (Xa4), IRBB5 (xa5), IRBB7 (Xa7), IRBB8 (xa8), IRBB10 (Xa10), IRBB11 (Xa11),IRBB13 (xa13),IRBB14 (Xa14), IRBB21 (Xa21), IR24 (Xa18), IRBB50 (Xa4 + xa5), IRBB51 (Xa4 + xa13), IRBB52 (Xa4 + Xa21), IRBB53 (xa5 + xa13), IRBB54 (xa5 + Xa21), IRBB55 (xa13 + Xa21),IRBB56 (Xa4 + xa5 + xa13), IRBB57 (Xa4 + xa5 + Xa21), IRBB58 (Xa4 + xa13 + Xa21),IRBB59 (xa5 + xa13 + Xa21) and IRBB60 (Xa4 + xa5 + xa13 + Xa21). The results showed that most isolates were less virulent on lines with more than one genes pyramided than those with single resistance gene. The isolates tested were more virulent on IR24 and IRBB10,less virulent on IRBB5, IRBB7 and IRBB21. Based on interactions between isolates and rice near-isogenic lines, 7 cultivars with single gene (IRBB5, IRBB4, IRBB3, IRBB14, IRBB2, IRBB1 and IR24) were chosen as the differentials, and the tested isolates were classified into 7 virulence groups. The reaction patterns of the 7 groups in order were: RRRRRRR,RRRRRRS, RRRRRSS, RR/SRRSSS, RRRSSSS, RRSSSSS, RSSSSSS. The virulence frequencies were 7.69, 6.59, 14.29, 12.09, 14.29, 28.57 and 16.48％ respectively. The elementary system for races identification has been established in China based on the results. It will be possible to compare with races in other countries, and the results will facilitate the evelopment of rice resistance breeding to bacterial blight in China.关键词
Rice lines/Xanthomonas oryzae pv. oryzae/Virulence/Resistance geneKey words
Rice lines/Xanthomonas oryzae pv. oryzae/Virulence/Resistance gene引用本文复制引用
LIU Hong-xia,LIU Feng-quan,HU Bai-shi,YANG Wan-feng,CHEN Zhi-yi,XU Zhi-gang..Virulence of Xanthomonas oryzae pv.oryzae on Rice Near-lsogenic Lines with Single Resistance Gene and Pyramiding Lines in China[J].中国农业科学（英文版）,2004,3(10):764-769,6.基金项目
This study was supported by the National Natural Science Foundation of China (30070497) and National 863 Program of China (2002AA245041). （30070497）
