Preliminary study on bacterial leaf blight resistance of different Xa gene in Hualien

Chia-Hsing Huang ； Wen-Chin Wu ； Cheng Zu Pan

《花蓮區農業改良場研究彙報英文摘要版》 34輯 (2016/12) Pp. 37-37

摘要

Bacterial leaf blight is one of the main diseases of rice cultivation in Taiwan. It caused serious damage to yield and quality of rice. After discovery of the resistance gene Xa, breeders can use marker-assisted breeding to develop the rice varieties resistant to bacterial leaf blight. In this study, the xa5 and Xa21 genes showed the highly resistance to three Xanthomonas oryzae pv. oryzae (Xoo) strains. The average length of lesion was shorter than 3 cm. The rice varieties containing two Xa genes showed the resistance to three Xoo strains except IRBB51. The lesion length of the rice varieties with more than three Xa genes were all shorter than 2 cm and showed resistance or highly resistance to three Xoo strains. Our results demonstrated that those rice varieties had two Xa genes plu xa5 or Xa21 showed highly resistance in XN12, XO12 and XF89b. The results provided the suggestioin in the selection of parents and Xa gene stacking strategy for the resistance breeding against bacterial leaf blight in the eastern Taiwan.

關鍵字

genotype ； resistance breeding ； marker assisted breeding