1. 전국에서 채집 분리한 51개의 균주를 phage의 용 균형에 따라 분류하여 8가지 계통으로 나누었다. 2. 8가지 계통 중 F-계통이 우리나라에 가장 많았으며 H.C.A계통이 그 다음 순이었고 일본이나 남방계에 많은 D-계통은 발견되지 않았다. 3. 우리나라에 분포하고 있는 흰빛잎마름병균은 지역에 따라서 계통이 한정되거나 특이성을 보이지 않았다. 4. 통일품종은 단일품종내에서 6가지의 계통이 분리되었으나 다른 품종에서는 3가지 이내의 계통이 분리되었다.
Fifty-one isolates of Xanthomonas oryzae collected from all over the Korean paddy field were classified as the eight different strains by using four different bacteriophage types. Strain-F was the most prevalent form and strain-H,C, and A followed the strain-F, respectively. Strain-D, however, had not found even single isolate although the strain·D is the most prevalent form at Japan and southern countries of Asia. There was no corelation between the type of strains and the area front which the strain had been collected. Six different types of strains were isolated from IR 667 varieties whereas the three strains were maximum that could isolated from single variety other than IR 667
