Studies
of sugar production in corn stalks.
Single crosses produced in Japan from UrLited States
inbreds yielded very well in comparison with local standard varieties. However,
these hybrids were a little late in maturity. Table I presents production data
from one of the trials in Japan while Table II shows stalk sugar content in the
single cross T1 x C103 and the effect of ear removal.
The observations to date may be summarized as
follows: In view of aiming toward a dual crop, the lowering of stalk sugar
content in the hybrid is an iniportant problem. I am afraid that any C103
hybrid combination, irrespective of high sugar readings of parent inbreds,
would always produce low sugar content stalks at maturity because of its
vigorous productivity of ear. Opinion on this question as well as seed of
promising inbreds or hybrids for ear and sugar production will be gratefully
received at Hokkaido.
Table I
|
Entry |
Silking days |
Height (cm) |
No. of ears |
Plant wt. (gr) |
Dried ear (gr) |
Dried seed (gr) |
Yield per1OA (kg) |
|
T1 x C103 |
92 |
272.6 |
1.3 |
1575.0 |
372.5 |
293.3 |
1056 |
|
W22 x C103 |
88 |
282.2 |
1.1 |
1765.5 |
333.3 |
267.8 |
964 |
|
Long Fellow |
80 |
233.4 |
1.3 |
1046.0 |
190.0 |
155.0 |
588 |
|
Yellow Dent |
84 |
257.0 |
1.1 |
1074.0 |
268.6 |
228.6 |
823 |
|
Wis. 12 |
83 |
248.2 |
1.0 |
948.6 |
198.3 |
165.7 |
597 |
Planted
May 12
Table II
|
|
Aug. 7 (earing stage) |
Aug. 24 |
Aug. 31 |
Sept. 11 |
Sept. 21 |
Sept. 29 (maturing stage) |
|
|
% |
% |
% |
% |
% |
% |
|
T1 x C103 |
4.0 |
7.5 |
9.6 |
5.0 |
4.0 |
4.0 |
|
T1 x C103 |
‑ |
ear |
13.5 |
14.5 |
16.0 |
16.5 |
|
T1 x C103 |
‑ |
- |
ear |
12.4 |
15.8 |
16.0 |
Tsunetoshi Shibuya
(communicated by Herbert L. Everett, Connecticut)