Table 2.
Significant QTL associated with biomass and root architectural traits in the Brassica napus TNDH mapping population
| Trait | QTL name | Chromosome | Marker | Position (cM) | LOD score | 2 LOD support interval (cM) | Additive effect | R2 (%) |
|---|---|---|---|---|---|---|---|---|
| SDW at LP | SDW_LP_A02a | A02 | znS16M07-1-230 | 80·3 | 3·46 | 77·8–83 | –0·30 | 6·2 |
| SDW_LP_A03a | A03 | BRMS-043 | 44·2 | 7·68 | 42–44·6 | –0·47 | 14·9 | |
| SDW_LP_A04a | A04 | JICB0283 | 7·2 | 5·15 | 5·3–17·2 | –0·36 | 9·9 | |
| SDW at HP | SDW_HP_A03a | A03 | BRMS-043 | 44·2 | 4·28 | 43·2–46 | –0·43 | 8·5 |
| SDW_HP_C02a | C02 | sN3761b | 11·9 | 3·33 | 8·5–15 | 0·36 | 7·2 | |
| RDW at LP | RDW_LP_A03a | A03 | BRMS-043 | 44·2 | 3·89 | 43·2–46 | –0·07 | 7·8 |
| RDW at HP | RDW_HP_A03a | A03 | CNU098 | 61·3 | 3·13 | 60·3–62·4 | –0·07 | 6·4 |
| LRN at LP | LRN_LP_A03a | A03 | HBr082 | 37·5 | 4·11 | 36·8–38 | –1·19 | 8·9 |
| LRN_LP_A03b | A03 | BRMS-043 | 44·2 | 4·81 | 43·2–46 | –1·30 | 10·4 | |
| LRN_LP_A03c | A03 | B068E07-2 | 51·9 | 3·71 | 50·8–52·5 | –1·13 | 8·4 | |
| LRN at HP | LRN_HP_C09a | C09 | CB10064 | 36·0 | 3·51 | 34·6–43·6 | 1·06 | 8·2 |
| LRD at LP | LRD_LP_A02a | A02 | em12me31-320 | 73·3 | 3·92 | 66·6–75·5 | –0·14 | 7·5 |
| LRD_LP_A03a | A03 | CNU098 | 61·5 | 4·55 | 60·3–62·4 | –0·16 | 8·7 | |
| LRD_LP_A03b | A03 | H034E17-1 | 69·3 | 3·83 | 67·3–70·7 | –0·14 | 7·4 | |
| LRD_LP_A03c | A03 | BnPYK10-A3b | 76·7 | 3·89 | 70·7–76·8 | –0·14 | 7·8 | |
| LRD_LP_A09a | A09 | B019F12-3 | 37·9 | 5·37 | 34·9–40·6 | –0·23 | 11·5 | |
| LRD_LP_C06a | C06 | JBnB061J08 | 29·0 | 3·74 | 25·7–35·2 | –0·13 | 7·1 | |
| LRD at HP | LRD_HP_A04a | A04 | JICB0283 | 16·2 | 5·98 | 7·6–21 | –0·15 | 13·2 |
| LRD_HP_C04a | C04 | sN12353c | 50·6 | 3·36 | 49·9–52·3 | –0·10 | 6·8 | |
| LRD_HP_C04b | C04 | Na10C01a | 62·2 | 3·64 | 59·6–62·7 | –0·10 | 7·5 | |
| TRL at HP | TRL_HP_A03a | A03 | BnWRKY-A3 | 14·4 | 3·64 | 10·8–17 | –1·33 | 7·5 |
| PRL at LP | PRL_LP_A03a | A03 | BnPHT3-A3 | 15·5 | 3·36 | 13·5–18·8 | –0·40 | 5·8 |
| PRL_LP_A07a | A07 | BRAS023 | 29·8 | 4·76 | 28·8–36·3 | 0·48 | 9·5 | |
| PRL_LP_A07b | A07 | HR-Tp4-305 | 42·6 | 5·70 | 39·5–46·4 | 0·50 | 10·2 | |
| PRL_LP_A07c | A07 | sR7223 | 50·6 | 4·46 | 48–54·3 | 0·44 | 8·2 | |
| PRL_LP_C06a | C06 | em18me23-350 | 27·5 | 6·07 | 17·6–34·7 | 0·53 | 12·0 | |
| PRL at HP | PRL_HP_A03a | A03 | BnPHT3-A3 | 15·5 | 4·59 | 14·4–17 | –0·67 | 8·3 |
| PRL_HP_A03b | A03 | H003M07-4 | 21·9 | 3·88 | 20·9–27·8 | –0·64 | 8·0 | |
| PRL_HP_C06a | C06 | CNU053a | 21·4 | 6·82 | 20·6–25·7 | 0·82 | 14·8 | |
| PRL_HP_C06b | C06 | em18me23-350 | 27·5 | 8·00 | 25·7–33·6 | 0·85 | 16·3 |
REML estimated means for biomass and root architectural traits for 176 lines in the TNDH mapping population were used to estimate QTL positions associated with these traits using the zmapQTL model 6 composite interval mapping function (Wang et al., 2011a). Significant (P < 0·05) LOD thresholds for individual traits were determined using 1000 permutations. A positive additive effect indicates a positive contribution of the ‘Tapidor’ allele to the trait value.