Table 2.
Diameter of floret meristem, ovary volume at anthesis, number of vascular bundles in the ovary wall, number of starch granules per kernel, number of endosperm cells per kernel, and the cross-sectional area of endosperm cells in the central region of the endosperm for apical kernels of main shoot panicles
| Genotype | Diameter of floret meristem (μm) | Ovary volume at anthesisb (mm3) | Number of vascular bundles in the ovary wallb | Number of endosperm cellsb (×104 kernel−1) | Cross–sectional area of endosperm cells (×103 m2) | Number of starch granules (×106 kernel−1) | |
| Experiment 1 | KS115 | – | 1.67 a | 5.3 a | – | – | 14.9 a |
| ATx642/KS115 | – | 1.20 b | 4.0 b | – | – | 10.6 b | |
| BTx642 | – | 0.91 c | 2.5 c | – | – | 6.3 c | |
| ATx642/RQL36 | – | 0.97 c | 2.3 c | – | – | 7.2 c | |
| RQL36 | – | 0.91 c | 2.3 c | – | – | 7.1 c | |
| Experiment 2 | KS115 | 160.2 a | 1.43 a | 5.3 a | 8.21 a | 12.9 a | 14.4 a |
| ATx642/KS115 | 146.7 b | 1.12 b | 4.1 b | 6.60 b | 12.5 a | 8.9 b | |
| ATx642/RQL36 | 133.6 c | 0.82 c | 2.7 c | 4.57 c | 10.6 b | 6.3 c |
a
Measured immediately before the initiation of stamen primordia in developing florets.
b
For each experiment, means in columns that are followed by the same letter do not differ significantly (P < 0.05).