242 TilK INIIKRI I'ANCE OF THE FLOWERING TIME IN PEAS AND RICE 
Raisings of G. P. Offsprings in 1912 and 1913. 
Though \vc were cjuitc convinced, from the previous experiments, of the 
stability of the flowering character, we took care, in the raisinj^s of the G- P- 
progenies for the purpose of com[)arison witli the hybrid progenies, to select 
those parent plants which differed in flowering times. In Table 6, we show 
the results of the raisings in 1912 and 1913, in which the stability of the 
flowering character and the existence of two pure lines are clearly shown. 
Inheritance of the Flowering Time in Hybrid Progenies- 
Raising in 1910. 
The sowing of the hybrid seeds (106 of G- P- x M P- and 64 of M. P. 
X G- P ", Page 238) was done on the 21st of May. The sprouting of the seeds 
was so uneven, as to make it necessary to calculate the value of the flowering 
time of every individual by the formula already mentioned ( page 23g). 
The frequency distribution of the value of the flowering time is as shown 
in Table 7. From this table, ws see the incomplete dominance of lateness 
in the Fj^, and no difference between the reciprocal crosses. 
It was not then known yet that there were two distinct pure lines in G- 
P. population ; but as the line of every parent plant was ascertained by the 
later experiments, we have arranged, in the table, all families into two 
groups, the early and late lines. By calculating the variation means of both 
groups separately, Ave have 47.8 days in the early line group and 49.5 days 
in the late line group. So the variation mean of the F^^ individuals whose 
G- P- parents belonged to the earlv pure line, is smaller than that of the F^^ 
individuals whose G- P> parents belonged to the late pure line. This dif- 
ference of the means in the two groups suggests that the pure line character 
is inheritable in itself. 
As to the morphological characters of the F-^ plants, the color of all of 
the flowers was red ; the height of the stem was not just intermediate, but 
rather inclined towards, that of G- P-, the average height of lOD F plants 
being 158.8 cm., while that of G- P- and M- P- was 184.48 cm. and S6.02 cm. 
