Table 3.
Female inflorescence traits of B73 in the field pot study, Johnston, IA
| Treatment | Ear length (cm) by Stage | Ear elongation rate (cm/day) | Max. no. spikelets | Spikelet initiation rate (spikelets/day) | ||||
|---|---|---|---|---|---|---|---|---|
| V10 | V12 | V14 | R1 | R2 | ||||
| WW | 0.1 ± 0.06 | 0.6 ± 0.1 | 2.2 ± 0.6 | 6.1 ± 1.7 | 18.6 ± 1.8 | 0.76 | 52.2 ± 3.0 | 2.43 |
| DRT | 0.1 ± 0.05 | 0.4 ± 0.2 | 1.2 ± 0.4a | 2.7 ± 0.9a | 9.7 ± 0.9a | 0.35 | 45.1 ± 4.3a | 2.13 |
Ear elongation rate was calculated using data collected after V14 (GDDC 600). Spikelet initiation rate was calculated using data collected prior to V14 (GDDC 600). The maximum number of spikelets occurred at R1 (GDDC 750). Spikelet initiation rate and ear elongation rate were calculated using linear regression based on data in Figure 2. Measurements represent mean ± SD. One day is approx. 11 GDDC, growing degree days.
a
DRT means are statistically different from WW at p < 0.01.