Multiple Regression Analyses on the Process of Breakdown of Pi-k Rice Varieties by Blast Disease in Niigata Prefecture
Open Access
- 1 January 1975
- journal article
- Published by Japanese Society of Breeding in Ikushugaku zasshi
- Vol. 25 (2) , 109-120
- https://doi.org/10.1270/jsbbs1951.25.109
Abstract
The data on breakdown of Pi-k rice varieties by blast obtained by IWATA and his coworkers were analyzed by multiple regression analyses. The results demonstrated the participation of percent area of Pi-k varieties in the breakdown of Pi-k varieties. A difference of the mode of outbreak of blast was found between mountainous and plain regions.Keywords
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