イネいもち病における寄主・病原菌の関係の因子分析法による研究

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In the blast disease of rice plants, there were two ways to record the relationships between host and pathogen. The one was qualitative, assigning the varietal reactions in a few class judging from lesion types by the spraying or injection method^<14)>, and the other was quantitative, estimating their susceptibility indicies which indicated the hyphal development in cells of host by the sheath inoculation method. The conclusions drawn by the factor analysis from quantitative records were consistent with the ones of qualitative data as previously reported by Morishima") as follows : (1) The contribution of the first component of the races or of the isolates was distinctly much more than those of the second or of other higher ones. (2) The first component score was found to be closely correlated to the general resistance score or to the average degree of resistance of varieties. Of twenty-four races scattered by the first and second factor, T, C-1, C-2 and C-5 Races were differentiated from N-Races on the one side, increasing the number of varieties susceptible, and on the other C-3 and C-6 Races, specializing their varietal reactions. Calculating from the susceptibility indicies, those distinguishable differences were observed in the magnitude of the loading of the first component between the varieties grouped into the same presumed genotype, qualitatively designated from lesion types. Those differences were confirmed to be based on the genic systems of varieties, for instance, that of the Sensho^<4)> and the Norin No. 22^<13)>, of the Shin-No. 2 type.
日本植物病理学会の論文
1973-01-01

イネいもち病における寄主・病原菌の関係の因子分析法による研究

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