Table 5. Analysis of quantitative trait loci (QTLs) for head splitting resistance in a cabbage doubled haploid population using multiple-QTL mapping (MQM) and inclusive composite interval mapping (ICIM) approaches.
| Year | QTL names a | Linkage group | Position (cM) | LOD | Marker interval | R 2 (%) b | Add c |
|---|---|---|---|---|---|---|---|
| 2011 (MQM) | Hsr 4.2 | C4 | 80.0 | 5.46 | SF12597a-SF11933 | 11.8 | 9.46 |
| Hsr 7.1 | C7 | 37.2 | 3.42 | SF46873-SF6178 | 7.7 | -6.78 | |
| Hsr 7.2 | C7 | 68.0 | 3.74 | Indel112-Indel113 | 8.5 | -7.84 | |
| Hsr 9.2 | C9 | 63.2 | 5.62 | SF13994-Indel146 | 13.6 | 10.94 | |
| 2012 (MQM) | Hsr 4.1 | C4 | 23.0 | 3.86 | SF13319-Indel58 | 8.6 | 8.25 |
| Hsr4.2 | C4 | 81.4 | 5.61 | SF12597a-SF11933 | 12.8 | 10.78 | |
| Hsr 9.2 | C7 | 63.2 | 5.48 | SF13994-Indel146 | 11.1 | -10.02 | |
| Hsr 9.3 | C9 | 112.8 | 3.66 | BoE344-BoE975 | 7.44 | -6.92 | |
| 2011 (ICIM) | Hsr 3.1 | C3 | 112.0 | 3.36 | Indel117-SF31711 | 5.50 | -6.78 |
| Hsr 3.2 | C3 | 143.0 | 7.31 | Indel42-SF10471 | 16.93 | 11.76 | |
| Hsr 4.1 | C4 | 23.0 | 6.16 | SF13319-Indel58 | 12.56 | 10.18 | |
| Hsr 4.2 | C4 | 80.0 | 6.96 | SF12597a-SF11933 | 12.86 | 10.37 | |
| Hsr 9.2 | C9 | 63.0 | 5.74 | SF13994-Indel146 | 11.26 | 9.76 | |
| 2012 (ICIM) | Hsr3.2 | C3 | 143.0 | 7.86 | Indel42-SF10471 | 15.36 | 11.76 |
| Hsr4.2 | C4 | 80.0 | 6.93 | SF12597a-SF11933 | 11.1 | 9.15 | |
| Hsr 9.1 | C9 | 34.0 | 4.62 | SF36132-SF146827 | 9.2 | -9.08 | |
| Hsr 9.2 | C9 | 63.0 | 5.93 | SF13994-Indel146 | 11.82 | 10.38 | |
| Hsr 9.3 | C9 | 111.0 | 3.44 | BoE344-BoE975 | 8.67 | -8.20 |
a QTLs are named according to the trait (i.e., Hsr, head splitting resistance) followed by the chromosome number and position.
b Proportion of the phenotypic variation explained by each QTL.
c Additive effect: positive and negative values indicate that parental lines 96–100 and 79–156 respectively bear the head splitting resistance-enhancing allele.