YUZO HOSHINO 
269 
In 1910. 
In the previous year, besides the raising of F-^, we made crosses again 
and got 6 hybrid grains in ^ K. P. x JA. P- and 7 grains in ^ A. P. x 
S K- p. We sowed these grains on May 18 directly in pots. There was 
one grain which failed to sprout in each of the reciprocal crosses, but we had 
1 1 plants which came to maturity. The number of days from sowing to 
shooting of the F.^ plants and of the offsprings of the parents was as follows : — 
Hybrid Fj 
Parents 
Pot 
Pot 
A P.xK. p. 
I . . 
. I r I 
days 
A p. I 
.90 
K. p. 
I . 
^ 
122 
}> 
2 . 
.105 
„ 2. 
.90 
2. 
.119 
3-- 
.104 
„ 3- 
•91 
J • 
.122 
49 
5- 
.102 
...98 
Pot 
„ 4- 
•90 Pot 
4- 
.121 
6 
No. 47-^ 
. 5- 
33 No. 48^ 
5-- 
.126 
7- 
.102 
„ 6. 
.88 
6.. 
. I 26 
P xA p. 
I . 
...98 
, „ 7. 
.88 
\ " 
.122 
2.. 
.103 
Av 
Av. 
.89.2 
Av 
122.5 
50" 
J5 
3> 
\ 3J 
3- 
4- 
6. 
.103 
.102 
.103 
105.8 
Av. 
102.8 
P'rom the above results, we see that there is no difference between recip- 
rocal crosses, and that the shooting time in P"j^ is intermediate, inclining 
toward that of the early parent. 
On the Inheritance of Morphological Characters. 
1. Awn: Awned dominated awnless in F-^. The dominance of the 
awned character over the awnless in the rice hybrids is widely known to the 
circle of Japanese experimenters, but, as far as we know, this seems not yet 
to have been published in any scientific paper. It is interesting to notice that 
in wheat the awnless character is dominant, but in rice the opposite is true. 
2. Colour : Black colour of K- P. dominated F^^ and all F^ plants had 
black awns and black striations on stalk. 
