Table 1. QTLs associated with height and diameter identified in Populus family 331 F2 pedigree based on linkage-group- (LG) and genome-wise LOD significance thresholds (GW).
| QTL (LG) | Marker at QTL peak | LOD score | LOD threshold (LG) | LOD Threshold (GW) | Trait | % PVE | mu(ac)† | mu(ad)‡ | mu(bc)‡ | mu(bd)† | a | d | d/|a| |
| BM-1 (I) | AGCTG-1 | 3.26 | 2.9 | 4.3 | Clatskanie 8 yr height | 8.1 | 122.8 | 117.9 | 137.4 | 123.3 | −0.25 | 4.60 | 18.4 |
| BM-1 (I) | AGCTG-1 | 2.52 | 3.2 | 4.3 | Clatskanie 4 yr height | 6.6 | 8.8 | 9.8 | 10.7 | 8.7 | 0.05 | 1.50 | 30.0 |
| BM-1 (I) | AGCTG-1 | 2.33 | 3.0 | 4.4 | Clatskanie 4 yr diameter | 6.6 | 8.4 | 10.0 | 11.2 | 8.6 | −0.10 | 2.10 | 21.0 |
| BM-1 (I) | AGCTG-1 | 2.51 | 3.0 | 4.4 | Boardman 4 yr height | 5.4 | 343.7 | 338.4 | 381.3 | 368.2 | −12.25 | 3.90 | 0.30 |
| BM-1 (I) | TCCGT-4 | 2.55 | 2.9 | 4.3 | Boardman 4 yr diameter | 6.8 | 3.6 | 3.7 | 4.3 | 3.8 | −0.10 | 0.30 | 3.00 |
| BM-2 (II) | T_D03_07 | 3.36 | 2.8 | 4.3 | Boardman 4 yr diameter | 6.0 | 4.1 | 3.8 | 4.1 | 3.6 | 0.25 | 0.10 | 0.40 |
| BM-2 (II) | T_I17_06 | 4.05 | 3.1 | 4.4 | Boardman 4 yr height | 7.2 | 331.2 | 383.2 | 369.9 | 341.8 | −5.30 | 40.10 | 7.56 |
| BM-2 (II) | P_422 | 4.33 | 3.0 | 4.4 | Clatskanie 4 yr diameter | 7.9 | 8.4 | 10.1 | 11.2 | 8.2 | 0.10 | 2.35 | 23.50 |
| BM-2 (II) | P_422 | 4.31 | 3.4 | 4.3 | Clatskanie 4 yr height | 7.8 | 8.6 | 9.9 | 10.6 | 8.7 | −0.05 | 1.60 | 32.00 |
| BM-2 (II) | CCCTT-33 | 2.19 | 2.8 | 4.3 | Clatskanie 8 yr height | 5.9 | 116.5 | 133.3 | 127.5 | 121.0 | −2.25 | 11.65 | 5.18 |
| BM-3 (V) | AGCTG-7 | 7.02 | 2.7 | 4.3 | Boardman 4 yr diameter | 10.5 | 4.3 | 3.8 | 4.0 | 3.4 | 0.45 | 0.05 | 0.11 |
| BM-3 (V) | AGCTG-7 | 3.70 | 2.9 | 4.3 | Boardman 4 yr height | 6.4 | 374.5 | 345.8 | 376.4 | 329.0 | 22.75 | 9.35 | 0.41 |
| BM-4 (VII) | T_AE20_120 | 3.37 | 2.6 | 4.3 | Boardman 4 yr height | 11.6 | 389.2 | 355.0 | 309.2 | 365 | 12.10 | −45.00 | −3.72 |
| BM-4 (VII) | T_AB14_110 | 2.76 | 2.6 | 4.3 | Boardman 4 yr diameter | 5.5 | 4.15 | 3.8 | 3.5 | 3.9 | 0.12 | −0.38 | −3.00 |
| BM-4 (VII) | T_AF04_090 | 2.62 | 2.6 | 4.4 | Clatskanie 4 yr diameter | 5.1 | 10.9 | 9.9 | 7.8 | 9.4 | 0.75 | −1.30 | −1.73 |
| BM-4 (VII) | P_2140 | 2.52 | 2.6 | 4.3 | Clatskanie 4 yr height | 4.2 | 10.2 | 10.0 | 8.3 | 9.3 | 0.45 | −0.60 | −1.33 |
| BM-5 (VIII) | TCCGT-16 | 4.94 | 2.3 | 4.3 | Boardman 4 yr diameter | 8.2 | 4.1 | 4.1 | 3.7 | 3.5 | 0.30 | 0.10 | 0.33 |
| BM-5 (VIII) | TCCGT-16 | 2.70 | 2.5 | 4.4 | Boardman 4 yr height | 4.5 | 370.7 | 373.2 | 335.4 | 346.4 | 12.15 | −4.25 | −0.35 |
| BM-5 (VIII) | TCCGT-16 | 2.83 | 2.4 | 4.3 | Clatskanie 8 yr height | 5.2 | 128.7 | 130.7 | 116.2 | 122.0 | 3.35 | −1.90 | −0.57 |
| BM-6 (XIII) | CCCCT-N3 | 2.83 | 2.9 | 4.4 | Boardman 4 yr height | 6.7 | 364.6 | 335.0 | 347.8 | 385.8 | −10.60 | −33.80 | −3.19 |
| BM-6 (XIII) | CCCCT-N3 | 2.45 | 2.8 | 4.3 | Boardman 4 yr diameter | 5.7 | 4.0 | 3.6 | 3.7 | 4.2 | −0.10 | −0.45 | −4.50 |
| BM-6 (XIII) | AGCTG-27 | 4.26 | 2.9 | 4.3 | Clatskanie 8 yr height | 10.9 | 121.5 | 113.6 | 127.8 | 136.3 | −7.40 | −8.20 | −1.11 |
| BM-7 (XIV) | CTACG-N1 | 4.34 | 2.7 | 4.3 | Boardman 4 yr diameter | 9.0 | 3.9 | 4.3 | 3.9 | 3.5 | 0.20 | 0.40 | 2.00 |
| BM-7 (XIV) | AGCGA-14 | 3.94 | 2.8 | 4.4 | Boardman 4 yr height | 6.7 | 364.8 | 370.7 | 365.2 | 318.5 | 23.15 | 26.30 | 1.14 |
| BM-7 (XIV) | AGCGA-14 | 4.88 | 2.8 | 4.4 | Clatskanie 4 yr diameter | 8.7 | 9.4 | 11.3 | 9.6 | 7.4 | 1.00 | 2.05 | 2.05 |
| BM-7 (XIV) | CTACG-N1 | 3.95 | 2.8 | 4.3 | Clatskanie 8 yr height | 10.5 | 120.2 | 132.8 | 138.8 | 116.6 | 1.80 | 17.4 | 9.67 |
| BM-7 (XIV) | CTACG-N1 | 2.26 | 2.9 | 4.3 | Clatskanie 4 yr height | 5.9 | 9.4 | 10.3 | 10.4 | 8.5 | 0.45 | 1.40 | 3.11 |
| BM-8 (XVII) | T_L09_105 | 2.50 | 2.4 | 4.3 | Boardman 4 yr diameter | 6.2 | 4.0 | 4.0 | 3.5 | 3.8 | 0.10 | −0.15 | −1.50 |
| BM-8 (XVII) | T_AI06_055 | 1.94 | 2.5 | 4.4 | Boardman 4 yr height | 4.1 | 377.3 | 368.7 | 342.0 | 341.8 | 17.75 | −4.2 | −0.24 |
| BM-9 (XIX) | ACCTG-24 | 3.72 | 2.7 | 4.4 | Clatskanie 4 yr diameter | 10.2 | 7.9 | 10.7 | 9.1 | 11.5 | −1.80 | 0.20 | 0.11 |
| BM-9 (XIX) | ACCTG-24 | 3.53 | 2.5 | 4.3 | Clatskanie 4 yr height | 11.2 | 8.3 | 11.0 | 9.0 | 10.5 | −1.10 | 0.60 | 0.55 |
| BM-9(XIX) | AGCTG-8 | 2.51 | 2.6 | 4.3 | Clatskanie 8 yr height | 3.8 | 120.5 | 122.1 | 124.4 | 133.5 | −6.50 | −3.75 | −0.58 |
%PVE = percent phenotypic variance explained;
†
Mean associated with heterozygous genotypes ‘ac’ and ‘bd’ where alleles are derived from the same species;
‡
Mean associated with heterozygous genotypes ‘ad’ and ‘bc’ where alleles are derived from different species, a = additive; d = dominance; d/|a| = QTL mode of action.