Table 1.
Percentage contributions for individual variance components derived from the REML analyses of biomass and root architectural data measured in the Brassica napus TNDH mapping population
| Trait | Replicate | Run | Plate | Position | Line† | [P]ext† | Line × [P]ext† | Residual |
|---|---|---|---|---|---|---|---|---|
| SDW | 0·32 | 2·97 | 10·62 | 2·74 | 30·70*** | 3·98*** | 4·72*** | 43·94 |
| RDW | 1·64 | 3·53 | 13·19 | 0·84 | 28·01*** | 2·67*** | 3·47*** | 46·64 |
| PRL | 2·29 | 9·95 | 9·64 | 3·27 | 13·08*** | 23·52*** | 4·15*** | 34·10 |
| LRL | 0·53 | 6·11 | 13·91 | 1·56 | 16·06*** | 3·12*** | 5·08*** | 53·63 |
| LRN | 0·67 | 9·98 | 10·93 | 1·17 | 15·92*** | 1·30*** | 4·54*** | 55·48 |
| LRD | 1·11 | 6·43 | 8·41 | 1·28 | 13·47*** | 17·77*** | 4·88*** | 46·65 |
| TRL | 0·79 | 12·14 | 9·88 | 1·46 | 14·81*** | 14·78*** | 4·65*** | 41·48 |
Data were analysed in GenStat using the REML procedures with a random term [(Replicate/Run/Plate/Position) + ([P]ext × Line)] and no defined fixed factors.
† A Wald test statistic was calculated so that significant sources of variation could be identified using a χ2 function (degrees of freedom for Line = 191, [P]ext = 1, Line × [P]ext = 191; *** = P < 0·001).