水稲胡麻葉枯病耐病性の品種間差異について

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These experiments were practised during four years from 1949 on the two different "akiochi"paddy-field, about 116 varieties, so as to test the varietal difference of the resistance to the brown spot of paddy-rice, which fall evidently ill in the "akiochi" one. In the result of examination of numbers of brown spot, those size and leaf-wilting degree on the upper three leaves in every variety ; the clear diffeirences fetween those were recognized. Brown spot has a high correlation between years, if those were classified early or late, and there are +0.8509~0. 0397 correlation in the early group, +0. 6222 0. 0849 correlation in the late one. The correlation between two experimental plots 'aried the climate and the soil condition is +0. 5310 0.0856 and the clear differences to resistance were recognized in the varieties. The sizes of brown spot differ remarkablly from the varieties and have to the very great spot from the smallest one. There are a slight correlation between the spot types and numbers. Also the excellent differences on the leaf-wilting degrees were recognized in the varieties, and a low correlation between those leaf-wilting degrees and spot numbers and the correlation between ones and spot types was not almost recognized, that is the leaf-wilting phenomena on the "akiochi" paddy-field don't occur especialy in relation to the numbers and types of brown spot, but the many sided and secondary phenomena. A few number of blown spots, tne small spot types,and a low degree o. f the leaf-wilting are the desirable varieties ; these low correlation indicafes a possibility of breeding good varieties.
日本育種学会の論文
1954-05-15

水稲胡麻葉枯病耐病性の品種間差異について

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