Table 4.
Comparison of flag leaf chlorophyll content and chlorophyll a : b ratio among hybrid and inbred rice varieties at different dates of planting in dryseason, 2009-2010¶.
| Variety/planting date | Total chlorophyll (mg g−1) | Chlorophyll a : b | ||||||
|---|---|---|---|---|---|---|---|---|
| 2DAF | 9DAF | 16DAF | 23DAF | 2DAF | 9DAF | 16DAF | 23DAF | |
| Hybrids | ||||||||
| BRRI hybrid dhan2 | 2.65b | 2.53a | 2.16b | 1.77b | 3.18a | 2.97a | 2.41b | 2.09 |
| Heera2 | 2.80a | 2.57a | 2.29a | 1.87a | 3.22a | 2.88a | 2.51a | 2.13 |
| Inbred BRRI dhan45 | 2.05c | 1.80b | 1.49c | 1.30c | 2.88b | 2.63b | 2.39b | 1.99 |
| Planting dates | ||||||||
| 20 December | 2.42 | 2.32 | 2.05 | 1.71a | 3.15 | 2.90 | 2.48 | 2.14 |
| 05 January | 2.52 | 2.28 | 2.02 | 1.65ab | 3.16 | 2.85 | 2.51 | 2.05 |
| 20 January | 2.52 | 2.33 | 1.97 | 1.67a | 3.07 | 2.77 | 2.39 | 2.06 |
| 05 February | 2.53 | 2.28 | 1.89 | 1.56b | 2.97 | 2.77 | 2.37 | 2.05 |
| Interaction | ||||||||
| Variety × planting date | NS | NS | NS | NS | NS | NS | NS | NS |
| CV (%) | 6.21 | 5.73 | 7.30 | 6.69 | 5.01 | 5.79 | 3.93 | 6.65 |
Within a column, means followed by the same letter(s) are not significantly different at 5% level of probability by DMRT. ¶site BRRI, Gazipur.
NS: nonsignificant at 5% level of significance.
DAF: days after flowering.