小豆の感温性の品種間差異 : その検定方法についての考察

抄録

1. The natural temperatures between two different latitudinal regions or between two altitudinal regions combined with the natural daylength at the regions of low temperature on each, were used for the means of the test on the sensitivity to temperature. 2. The sesitivity to temperature among varieties is adapted to the latitudinal relation, i. e. the early varieties distributed in the north with the dull sensitivity to short-day have the greater sensitivity to temperature while the late varieties in the south with the greater sensitivity to short-day have the smaller sensitivity to temperature. The Japanese ecotype is more or less sensible to temperature than the Continental ecotype. The late varieties need high threshold of temperature to flowering, but they have low sensitivity to temperature. 3. Many arguments have appeared for the varietal difference of the response to temperature influenced in photoperiodism on the soybean. Some workers have shown that the late varieties in the south with high sensitivity to short-day have high sensitivity to temperature than the early varieties in the north with low sensitivity to short-day. In comparison with the fact mentioned above, the relation among varieties may be possibly reverse. To make this confusion clear, studies were conducted for this problem. As a result, for the means of obtaining the different temperature to test, it is not adequate to plant on different seasons, or to use the glass house for the field condition on legume. The different two temperature conditions derived from the altitudinal regions show the most suitable method for clarifying the difference among varieties on the sensitivity to temperature.