YUZO IIOSIIINO 2 7-' 
that it would be ratlicr impossible to expect any definite interpretation of the 
inheritance of sliooting character in rice, by raising such a small number of 
individuals as 500. Ikit hoping that we might reach some interesting 
conclusion by comparing the results obtained in rice with those in peas, we 
took four Fg families, Nos. 4, 5, lO and 16 (Table 20), which showed some 
similarity in variation types and selected 23 individuals from them, taking 
care to select those which were different in shooting dates. Twenty offsjir- 
ings of each selected plant were raised. 
As the shooting of K- P. was too kite in the two previous years, the sow- 
ing of the seeds was done in wooden boxes placed in a forcing house on April 
20. After the temperature in the glass house had become high enough for 
rice, the plantlets were transplanted in pots. In spite of this precaution, the 
plants did not shoot early, because of the unusually low temperature which 
prevailed during the summer, and which caused an almost total failure in the 
paddy culture in the vicinity of Sapporo. In our raising. A- P- came to shoot 
a little later than in the previous two years, and K- P. did not shoot at all, 
even in the glass house. Five individuals of the family No. 5 of C Table 
21, also failed to shoot. 
Table 21 shows the results of this F^ raising. F., grand-parents of two 
raisings of A and B appeared on the same day and their F.^ parent families 
varied in a similar type, but in the present table their variation types are not 
similar. Those of B suggest strongly monohybricl segregation, family No. 2 
being an earlier constant, families Nos. 3 and 7 later constants, and the three 
families, No?. 5, i and 10, variable between two constants. In A, the varia- 
tion types are c|uite different. There is one family which seems to be a con- 
stant (No. 6). And the variation types of the remaining variable families are 
not those which would be expected in monohybrid segregation. In both rais- 
ings of C and D, we see also variation types of non-monohybrid segregation. 
Interpretation- 
By comparing the experimental results in rice with those in peas, we see 
