Table 2.
Agronomic traits of IR 64 and YTH34 under irrigated lowland and upland.
| Conditions | variety | Panicle No./plant | Culm length (cm) | Panicle length(cm) | Spikelet No./panicle | Seed fertility (%) | Panicle weight(g) | Dry weight (g) | Harvest index(%) | Days to heading |
|---|---|---|---|---|---|---|---|---|---|---|
| Irrigated lowland | IR 64 | 22.0 | 70.3 | 25.3 | 130.6 | 48.2 | 25.1 | 78.5 | 31.9 | 107.6 |
| YTH34 | 15.0 (68) | 70.8 (100) | 25.9 (102) |
109.1 (83) |
85.4 (177) |
32.2 (128) |
66.6 (84) | 48.4 (151) |
108.3 (100) |
|
| Upland | IR 64 | 47.0 | 51.3 | 25.9 | 138.0 | 63.4 | 51.9 | 140.0 | 38.0 | 140.0 |
| YTH34 | 17.0 (36) |
39.9 (77) |
22.8 (88) |
102.0 (74) |
66.6 (105) |
14.6 (28) |
48.0 (34) | 30.0 (78) |
151.0 (107) |
Rice varieties were cultivated at Tropical Agricultural Research Front, JIRCAS, Ishigaki, Okinawa Japan, in 2013 (Date were refereed from Uddin et al., 2016b).
Mean values among 12 plants were calculated in each trait.
( ) = Relative value (%) in compared with that of IR 64.