抄録
The strains used in this study are of two types (=combinations), viz. the one type has many tillering habit and the other few. All of the strains are tested of F3 plants of these two combinations. The relations between the variances of the number of tillers and ears and the hereditary variance on these materials have been studied. The hereditary variance are more extensive in the many tillering strains than in the few ones, but on either strain the relations between the number of tillers at the transplanting time and the number of heads at the maturity are almost same as on the fixed variety, viz. the said relations have hightly or slightly significant on one stem plot or two stems plot compared with over three stems ones, but not amongst over three stems plots respectively. In the case of the strains obtained by the combination of the few tillering habit varieties, the difference of the number of heads is significant between on stem plot and two stems one on the nursery bed. In short, it has been ascertained that the nursery selection by means of the number of tillers may be performs within the limit of over three stems being tillered provided that the maximum of tiller's number are five or six stems having appeared.
