メヒシバ属(Digitaria)の種間雑種に関する研究 : I.交雑法

概要

論文の詳細を見る
1. In Digitaria the spikelets are very small,so some experiments on the bui.k emasculation by hot livater were carried out in order to facilitate the hybridization. 2. In Crab Grass (D. ciliaris PERS.), the blocming was supressed on the day after the treatment. For the practical use, the treatment at 46'C from 5-1.5 minutes was found proper for the spikelets blooming on two days after the treatment. 3. In Smooth Crab Grass(D. ischap-walee MUHL.), the blooming was not absolutely supressed on the day-after the treatment. For the practical use, the treatment at 45'C from 5-lO minutes and at 44C for 10 minutes were found proper for the spikel.ets to bloom on the day after tho treatment. 4. In the natural condition, the blooming in three species of Dig'itaria -"vas from 0 to 4 o'clock in the midnight. The experiments on the control of the blooming time were carried out in all those species. 5. During the night, the pl.ants were kept at high temperature at about 30'C and were illuminated by the electric light. From the next morning, the darkness was maintained for them and temperature was gradually reduced to about 20'C. In this way the plants came into bloom in the daytime on the same day from 13 to 17 o'clock.
日本育種学会の論文
1956-12-20