DNA base sequence homology in Rhizoctonia solani Kuehn I. Genetic relatedness within anastomosis group 1.

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  • KUNINAGA Shiro
    Department of General Education, Higashi Nippon Gakuen University
  • YOKOSAWA Ryozo
    Department of General Education, Higashi Nippon Gakuen University

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  • <i>Rhizoctonia solani</i>におけるDNA塩基配列の相同性
  • Rhizoctonia solaniにおけるDNA塩基配列の相同性-1-菌糸融合群第1群内における遺伝的類縁性〔英文〕
  • Rhizoctonia solani ニ オケル DNA エンキ ハイレツ ノ
  • I. Genetic relatedness within anastomosis group 1

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DNA base sequence homology among AG-1 isolates of Rhizoctonia solani was investigated on the basis of DNA-DNA reassociation kinetics, and the genetic relationship among pathological types was examined. High values of DNA homology (range from 98.0 to 100.3%) were observed among isolates of the sasakii type (IA). There was also high homology among isolates of the web-blight type (IB) (range from 95.7 to 99.4%). While, comparatively low values of DNA homology were observed between isolates of both types (range from 49.9 to 55.9%). These results indicated that each pathological type in AG-1 is genetically homogenous, but both types are genetically divergent from each other.

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