TABLE 2.
Mean of parental BLUEs (for PJ’ and PZ’ separately), mean of mid-offspring across all families (mid-offspring estimated as mean of family-specific hybrid BLUEs), and mid-parent-mid-offspring correlation at experimental sites for observed traits in three OFSP H1 populations evaluated at two locations in Peru (Cañete and Satipo): WAE, wide adaptation and earliness (N = 9,881); NSSP, non-sweet sweetpotato (N = 3,742); HIFE, high iron (N = 3,292); RYTHA, storage root yield; NCRPL, number of commercial roots per plant; FYTHA, foliage yield; HI, harvest index; DM, root dry matter; BC, β-carotene; COSW, sweetness taste after cooking; STA, root starch; SUC, root sucrose; FE, root iron; MP-MO rp, mid-parent–mid-offspring Pearson correlation.
| OFSP H1 hybrid population (harvest day) |
Trait | Cañete (arid Pacific coast) | Satipo (humid tropics) | ||||||
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| PJ′ Parent BLUEs |
PZ′ Parent BLUEs |
PJ′ × PZ′ Mid-offspring BLUEs |
MP-MO rp |
PJ′ Parent BLUEs |
PZ′ Parent BLUEs |
PJ′ × PZ′ Mid-offspring BLUEs |
MP-MO rp |
||
| WAE (90) | RYTHA (t ha–1) | 6.4 | 8.2 | 7.6 | 0.299 | 22.9 | 15.2 | 26.3 | 0.194 |
| NCRPL | 0.95 | 1.09 | 1.02 | 0.377 | 2.71 | 1.97 | 2.75 | 0.207 | |
| FYTHA (t ha–1) | 9.7 | 15.1 | 11.1 | 0.422 | 54.4 | 85.1 | 73.0 | 0.382 | |
| HI (%) | 38.8 | 38.8 | 42.2 | 0.414 | 28.6 | 16.6 | 27.3 | 0.462 | |
| DM (%) | 27.7 | 27.6 | 27.5 | 0.638 | 23.7 | 25.5 | 24.9 | 0.701 | |
| BC (mg 100 g–1) | 20.4 | 21.2 | 18.8 | 0.667 | 24.5 | 21.4 | 21.4 | 0.589 | |
| WAE (120) | RYTHA (t ha–1) | 14.0 | 18.9 | 16.4 | 0.346 | 48.7 | 41.2 | 53.6 | 0.209 |
| NCRPL | 1.99 | 2.26 | 2.13 | 0.346 | 4.17 | 3.66 | 4.24 | 0.272 | |
| FYTHA (t ha–1) | 13.6 | 25.5 | 17.8 | 0.501 | 63.7 | 113.8 | 90.6 | 0.423 | |
| HI (%) | 49.8 | 45.1 | 49.4 | 0.508 | 43.4 | 28.8 | 39.2 | 0.367 | |
| DM (%) | 29.1 | 29.0 | 29.0 | 0.736 | 25.5 | 26.5 | 26.2 | 0.630 | |
| BC (mg 100 g–1) | 21.1 | 24.0 | 20.0 | 0.660 | 30.7 | 27.3 | 25.6 | 0.654 | |
| NSSP (120) | RYTHA (t ha–1) | 25.7 | 32.7 | 41.5 | 0.186 | 10.4 | 14.2 | 17.7 | 0.356 |
| NCRPL | 2.52 | 2.77 | 3.35 | 0.170 | 1.90 | 1.63 | 2.22 | 0.275 | |
| FYTHA (t ha–1) | 28.0 | 44.6 | 45.3 | 0.441 | 49.7 | 97.2 | 70.1 | 0.248 | |
| HI (%) | 48.9 | 43.5 | 50.1 | 0.332 | 20.7 | 14.5 | 21.3 | 0.323 | |
| DM (%) | 25.6 | 23.9 | 25.1 | 0.637 | 27.8 | 26.1 | 27.6 | 0.647 | |
| BC (mg 100 g–1) | 18.6 | 21.9 | 17.4 | 0.369 | 24.0 | 30.7 | 24.7 | 0.476 | |
| COSW (scale 1–9) | NA | NA | NA | NA | 5.64 | 5.66 | 5.72 | 0.193 | |
| HIFE (120) | RYTHA (t ha–1) | 19.6 | 28.1 | 36.4 | 0.522 | 36.5 | 45.1 | 52.2 | 0.590 |
| NCRPL | 1.99 | 2.39 | 2.85 | 0.451 | 3.43 | 3.72 | 4.12 | 0.396 | |
| FYTHA (t ha–1) | 30.7 | 49.1 | 46.5 | 0.467 | 25.4 | 36.3 | 35.4 | 0.398 | |
| HI (%) | 38.9 | 35.9 | 44.7 | 0.507 | 60.6 | 53.7 | 61.3 | 0.507 | |
| DM (%) | 25.3 | 23.8 | 24.0 | 0.647 | 24.7 | 23.8 | 24.0 | 0.582 | |
| STA (%) | 50.4 | 51.2 | 50.5 | 0.525 | 47.3 | 48.9 | 48.9 | 0.485 | |
| SUC (%) | 18.2 | 15.8 | 17.2 | 0.713 | 20.1 | 16.8 | 17.9 | 0.637 | |
| BC (mg 100g–1) | 42.8 | 46.2 | 38.4 | 0.507 | 38.3 | 42.3 | 35.3 | 0.503 | |
| FE (mg kg–1) | 23.0 | 20.4 | 22.0 | 0.425 | 23.2 | 20.0 | 21.4 | 0.445 | |