茶樹の自花受精に関する研究

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In the process of seed-propagation, it has been found that the percentage of self-fruiting is high. This percentage varres from 0.2-4 2%, showing 2.2%, as the average for the last 5 years, and it can be assumed practically to be almost the selfunfruitfulness. In order to study the cause of this phenomenon, here the authors tried to investigate on the mechanism of self-fertilization and the effect of artificial method. From the studies of the behavior of fruit drop and the growth rate of embryosac, it is cleared that the fruit drop of self arrld cross-pollination are remarkably different, the. former is due to the non-fertilization and the latter is caused by the physiological dropping. The low self-fruiting is. mainly due to the phenomenon of low degree of self-compatibility. Thi,s me,chanism can be pressumed as foll.ows. although the velocity of pollein tubes in style is low as well as the percentage of pollen ,germination on stigma, but the main cause ,is the remarkable retardation of pollen tubes between the base of style and the upper pa:rt of ovary. With the aim of artificral promotion of selffertility the author tried the bud poll,ination, the old flower pollination, the spraying of Fruitone in solution of 0.14% and the pollination at the close of flowering time. Iri the ca:se of the abov.e mentioned methods, the velocity of pollen tubes in style was hastened as well as the germination o,n sti,gma, but this growth power could not surpass the retardation rate of tubes bptween the base of style and the upper part of ovary so the effect on fertilization are not very marked. But the last method has gpt no effect fpr self-fertilization.
日本育種学会の論文
1956-03-30

茶樹の自花受精に関する研究

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