PATHOGENIC VARIATION AMONG MALAYSIAN ISOLATES OF XANTHOMONAS ORYZAE

H. ASHRAFUZZAMAN andK .M. CHIN

SUMMARY

A study of pathogenic variability among twenty Malaysian isolates of Xanthomonas oryzae revealed the existence of five pathotypes. Pathotypes 3 and 4 were the most virulent of the isolates tested but pathotype 2 appeared to be predominant. The relevance of these findings to the rice breeding programme is discussed.

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