Abstract:
The virulence differentiation of 62 isolates of X. oryzae pv. oryzicola collected from different areas in southern China were identified based on strain-cultivar interaction by using 28 varieties with different resistance genes. Flag leaves at booting stage were inoculated with selected strains by needle puncture. It showed that the virulence of strains were differentiated distinctly. Weak interaction patterns were found mainly between bacterial isolates and rice varieties, but there were specific interaction significantly. It was suggested that the X.oryzae pv. oryzicola could be divided into six race groups, the interaction patterns on six differential varieties were RRRRRS, RRRRSS, RRRSSS, RRSRSS, RRSSSS, and RSSSSS.
GUO Ya-hui ,XU Zhi-gang ,HU Bai-shi et al. Virulence Differentiation of Xanthomonas oryzae pv. oryzicola in Southern Region of China[J]. , 2004, 18(1): 83-85 .