Table 1.
Initial seed Zn concentration, days to flowering, and descriptions of the rice genotypes used in Experiments 2 and 3.
| Rice genotypes | Referred to in text as | Seed Zn concentration before sowing (mg kg–1) | Days to 50% flowering (DAP) (Zn- sufficient/Zn- deficient conditions) | Days to maturity (DAP) | Description |
|---|---|---|---|---|---|
| IR74 | IR74 | 14.5 | 84/83 | 114/114 | Irrigated lowland indica variety, susceptible to Zn deficiency at vegetative stage (Wissuwa et al., 2006) |
| Jalmagna | Jalmagna | 10.7 | Did not flower | NA | Deepwater cultivar from Northern India, tolerant of Zn deficiency at vegetative stage (Wissuwa et al., 2006) |
| RIL-46 (Jalmagna×IR74) | RIL-46 | 18.5 | 74/74 | 110/110 | Recombinant inbred line known to have tolerance alleles for Zn deficiency at all major QTLs (Wissuwa et al., 2006) |
| IR64 | IR64 | 17.0 | 54/61 | 84/91 | Lowland-adapted indica variety with moderate grain Zn (Wu et al., 2010) |
| Joryoongbyeo | Joryoongbyeo | 21.0 | 44/44 | 85/85 | Temperate japonica, Zn biofortification donor |
| SWHOO | SWHOO | 14.0 | 44/45 | 84/84 | Temperate japonica, Zn biofortification donor |
| IR69428-6-1-1-3-3 (IR68510× IR65600-1-3-2) | IR69428 | 30.0 (Exp 2), 23.0 (Exp 3) | 92/94, 102/105 | 128/128, 155/155 | Tropical japonica, Zn biofortification breeding line |
| IR75862-206-2-8-3-B-B-B (IR75083× IR65600-81-5-3-2) | IR75862 | 29.0 | 98/98 | 128/128 | Tropical japonica, Zn biofortification breeding line |
| IR68144-2B-2-2-3-1-127 (IR72× Zawa Bonday) | IR68144 | 14.0 | 62/62 | 93/93 | Zn biofortification breeding line |
| IR82247-5-3-3-2 (Jalmagna×Zuchein) | IR82247 | 15.0 | 89/89 | 114/114 | Zn biofortification breeding line |
| A69-1 (BG94-1×Pokkali) | A69-1 | 14.0 | 92/102 | 139/150 | Zn-efficient line |
| IR55179-3B-11–3 (IR4630-22-2-5-1-3× Nona Bokra) | IR55179 | 18.0 | 92/98 | 142/151 | Zn-efficient line |
| Kinandang Patong | KP | 20.0 | 102/NA | 149/NA | Upland japonica, Zn deficiency-susceptible line |
Seed includes hull and brown rice.
Parents of breeding lines are given in parentheses.
NA, not available. DAP, days after planting.