Beijing, China
Institute of Genetics, Academia Sinica
A mutant for sh2 kernel type
from high Space induced
--Zeng, M, Yang, T
In our previous paper we described a significant
influence of space flight of maize seeds on progeny, including the young
plant, ear and kernel (MNL.74:2-3). Five types of traits have been obtained,
including a mutant for the sh2 kernel type from Yi 0141
Sp3,Yiol41 Sp4 and Yi141 Sp4. The frequency of mutation for the
mutant was smaller, about 0.5%. The plant, ear and kernel characters of
the sh2 mutant in the Sp4-Sp6 generations were measured; the results
obtained are given in Table 1. The sh2-like mutant showed many favorable
components: early maturity - plants should produce all ears between 51-56
days after seedling; more ears per plant - plants should bear at least
three ears per plant; under conditions of high density planting, the quality,
size and shape of young ears is better; fewer husks for young ears - ear
husk numbers show 6-7 per ear; proper ear and plant height - plant height
is 165 cm, ear height is 60 cm. It all boils down to this, the sh2-like
mutant may be optimized breeding material for baby corn.
Table 1. Plant and ear traits for space
flight induced maize mutant of the sh2 kernel type.
| Plant height
(cm) |
165 |
| Ear height (cm) |
60 |
| Length of the
leaf of ear site (cm) |
71.5 |
| Width of the
leaf of ear site (cm) |
7.8 |
| Ear length (cm) |
16.2 |
| Ear diameter
(cm) |
4.3 |
| Tassel length
(cm) |
24.5 |
| Tassel branch
number |
16 |
| Leaf number |
20~21 |
| Number of kernel
row |
14~16 |
| Kernel number
per row |
47~51 |
| Weight of 1000
kernel (g) |
153 |
| Day from seedling
to kernel maturing |
114 |
| Kernel Colour |
yellow |
| Cob Colour |
pale-yellow |
Please Note: Notes submitted to the Maize Genetics Cooperation Newsletter may be cited only with consent of the authors.
Return to the MNL 75 On-Line Index
Return to the Maize Newsletter Index
Return to the MaizeGDB Homepage