Table 1.
Summary QTL results from a MIM analysis of a reciprocal F2 S. aethnensis and S. chrysanthemifolius mapping family. Quantitative trait locus LG and position are the linkage group and maximum likelihood of odds score (LOD) cM position of significant QTLs identified from MIM. Quantitative trait locus cM interval is the 2-LOD cM interval around the maximum LOD value that is indicated in parentheses. The additive and dominance effects are in the same units as trait measures. Positive additive effects support the direction of the species difference and vice versa for negative effects, while positive dominance effects indicate that S. aethnensis alleles are dominant and vice versa for negative effects. The PVE is shown in parentheses. Epistatic interactions show the loci for each trait (numbered in the order they appear in the table) with significant interactions with the additional PVE shown in parentheses.
| Trait ID number: trait (units) | QTL LG and position (cM) | QTL cM interval (max LOD) | Additive effect (PVE) | Dominant effect (PVE) | Total PVE | Epistatic interactions (PVE) |
|---|---|---|---|---|---|---|
| 1: Time from first true leaf to flowering (days) | AC1; 41.3 | 36.6–44.5 (6.19) | −3.41 (5.7) | −2.31 (1.3) | 7 | 2 × 3 (5.4) |
| AC2; 9.3 | 6.3–11.3 (9.22) | −5.27 (14.3) | 0.13 (0) | 14.3 | ||
| AC10A; 0 | 0–0.5 (15.35) | 9.02 (46.2) | −3.56 (2.3) | 48.5 | ||
| 7: Primary stem midleaf auricle width (mm) | AC10B; 3 | 0–4.2 (2.21) | 0.52 (7.3) | 0.41 (2.7) | 10 | |
| 8: Primary inflorescence capitulum number (count) | AC2; 11.3 | 0–14.2 (2.5) | 1.29 (8.5) | 0.96 (3.6) | 12.1 | |
| AC5A; 0 | 0–6.9 (2.57) | −1.34 (9) | 0.36 (0.4) | 9.4 | ||
| AC10A; 0 | 0–10 (4.89) | 2.14 (20.7) | −0.43 (−0.1) | 20.6 | ||
| 9: Primary capitulum pedicel length (cm) | AC8A; 11.4 | 0–27.5 (2.5) | 0.26 (11.7) | −0.07 (0.4) | 12.1 | |
| 11: Primary capitulum disc diameter (mm) | AC4; 23.6 | 12.5–36.3 (3.52) | 0.05 (6.4) | 0.08 (9.8) | 16.2 | |
| AC9; 0 | 0–15 (2.13) | −0.05 (6.2) | 0.03 (1.2) | 7.4 | ||
| 15: Mean pollen number (per 3/40 florets) | AC10B; 3 | 0–4.2 (2.03) | 7.79 (6.2) | −8.94 (3.8) | 10 | |
| 16: Mean pollen viability (proportion) | AC1; 0.9 | 0–5.5 (5.4) | 0.01 (−1.2) | −0.19 (25.9) | 24.7 | |
| 19: Mean fruit length (mm) | AC1; 18 | 2.4–39.6 (2.89) | −0.21 (−5.8) | 0.36 (26.1) | 20.3 | |
| 20: Mean pappus length (mm) | AC1; 23 | 8.5–36.6 (4.6) | 0.15 (5.9) | 0.32 (12) | 17.9 | |
| AC5B; 0 | 0–9.5 (2.09) | 0.2 (5.6) | 0.01 (0) | 5.6 | ||
| AC8A; 13.6 | 0–27.5 (3.43) | 0.27 (10.6) | 0.12 (1.3) | 11.9 | ||
| 21: Primary stem node length, height to leaf number ratio (cm) | AC4; 6 | 0–41.3 (2.8) | 0.09 (8.6) | 0.1 (2.9) | 11.5 | |
| AC5A; 0 | 0–6.9 (6.37) | −0.12 (18) | −0.01 (0.1) | 18.1 | ||
| AC10A; 4.1 | 0–10 (11.57) | 0.16 (30.1) | −0.11 (2) | 32.1 | ||
| 22: Branch number to leaf number (proportion) | AC4; 26.6 | 13.5–41.3 (4.3) | 0.1 (9.9) | −0.17 (12.1) | 22 | |
| 24: Primary capitulum ray display area (mm2) | AC1; 15 | 6.5–25 (6.75) | 4.69 (3.3) | 3.37 (1.9) | 5.2 | 1 × 3 (5.1) |
| AC4; 30.3 | 4–41.3 (2.07) | 6.9 (6.2) | 0.25 (0.1) | 6.3 | 1 × 4 (7.8) | |
| AC7A; 4.6 | 0–14.2 (6.45) | 5.79 (2.1) | 16.83 (7.1) | 9.2 | ||
| AC8A; 15.1 | 2.5–24.5 (5.5) | 8.13 (8) | 5.67 (−0.2) | 7.8 | ||
| AC10A; 2.8 | 0–8.6 (8.01) | 15.43 (20.9) | 0.54 (0.2) | 21.1 | ||
| 25: Primary stem midleaf dissection, perimeter to area ratio (per mm) | AC4; 3 | 0–41.3 (2.02) | 0.04 (6.9) | 0.04 (2.9) | 9.8 | 2 × 3 (10.1) |
| AC8A; 6 | 0–10 (7.29) | 0.04 (7.7) | 0.05 (6.3) | 14 | ||
| AC10A; 0 | 0–10 (9.01) | 0.06 (21.1) | 0.01 (0.5) | 21.6 | ||
| AC10B; 3 | 0–4.2 (2.6) | 0.02 (3.9) | 0.04 (4.4) | 8.3 |