Table 1.
Details of the experiments conducted in 2012–2013 with their corresponding growing environment
| Experiment | Condition | Environment codea | Stage of drought stress | Date of planting/ transplanting |
Population | Observed traitsb |
|---|---|---|---|---|---|---|
| 1 | Direct-seeded upland | 2012DUR | Reproductive | 11 January 2012 | Aus276/3*IR64 | PH, DTF, GY |
| 2 | Direct-seeded upland | 2013DUR | Reproductive | 22 January 2013 | Aus276/3*IR64 | EVV, PH, DTF, GY, biomass, HI |
| 3 | Direct-seeded upland | 2012DUN | Non-stress | 3 January 2012 | Aus276/3*IR64 | PH, DTF, GY |
| 4 | Direct-seeded upland | 2013DUN | Non-stress | 20 December 2013 | Aus276/3*IR64 | PH, DTF, GY |
| 5 | Direct-seeded upland | 2012WUS | Seedling | 20 June 2012 | Aus276/3*IR64 | EVV, NR, RHL, RHD, P concentration and uptake (seedling stage), PH, DTF, GY, biomass, HI |
| 6 | Direct-seeded upland | 2013DUS | Seedling | 17 January 2013 | Aus276/3*IR64 | EVV, NR, RHL, RHD, lateral root rating, nematode gall rating, P concentration and uptake (seedling stage), nutrient concentration and uptake [Al, Ca, Cu, Fe, K, Mg, N, Mn, Na, P, S, Zn (reproductive stage)], PH, DTF, GY, biomass, HI |
| 7 | Direct-seeded upland | 2012DUR | Reproductive | 11 January 2012 | Aus276/3*MTU1010 | PH, DTF, GY |
| 8 | Direct-seeded upland | 2013DUR | Reproductive | 22 January 2013 | Aus276/3*MTU1010 | EVV, PH, DTF, GY, biomass, HI |
| 9 | Direct-seeded upland | 2012DUN | Non-stress | 3 January 2012 | Aus276/3*MTU1010 | PH, DTF, GY |
| 10 | Direct-seeded upland | 2013DUN | Non-stress | 20 December 2013 | Aus276/3*MTU1010 | PH, DTF, GY |
| 11 | Direct-seeded upland | 2012WUS | Seedling | 20 June 2012 | Aus276/3*MTU1010 | EVV, NR, RHL, RHD, P concentration and uptake, PH, DTF, GY, biomass, HI |
| 12 | Direct-seeded upland | 2013DUS | Seedling | 17 January 2013 | Aus276/3*MTU1010 | EVV, NR, RHL, RHD, P concentration and uptake, PH, DTF, GY, biomass, HI |
| 13 | Transplanted lowland | 2012DLR | Reproductive | 20 December 2012/ 16 January 2012 |
Aus276/3*IR64 | PH, DTF, GY |
| 14 | Transplanted lowland | 2012DLN | Non-stress | 10 December 2012/ 5 January 2012 |
Aus276/3*IR64 | PH, DTF, GY |
| 15 | Transplanted lowland | 2012DLR | Reproductive | 20 December 2012/ 14 January 2012 |
Aus276/3*MTU1010 | PH, DTF, GY |
| 16 | Transplanted lowland | 2012DLN | Non-stress | 10 December 2012/ 5 January 2012 |
Aus276/3*MTU1010 | PH, DTF, GY |
a Environment codes: D, dry season; W, wet season; U, upland; L, lowland; N, non-stress (well-watered); R, reproductive-stage drought stress; S, seedling-stage drought stress.
b PH, plant height; DTF, days to flowering; GY, grain yield; NR, number of nodal root; EVV, early vegetative vigour; RHL, root hair length; RHD, root hair density; HI, harvest index.