Table 2.
Results of path analysis of direct and indirect effects of the QTL. The focal plant trait was tested against each neighbour plant trait to determine if any phenotypic interactions were occurring. Two path models were constructed for each set of interacting phenotypes: the identified pleiotropy model, where the locus affected the expression of only the focal plant traits directly and the indirect effects are a result of effects of those traits in neighbours (labelled in the table as the ‘phenotypic effect’), and the unidentified pleiotropy model, where the locus had a direct impact on (e.g. a path to) the neighbour plant traits (labelled as the ‘genetic effect’). Effect values are path coefficients under the alternative models. The identified : unidentified ratio demonstrates the efficacy of a particular model at explaining changes to trait values in the neighbour plant, with ratios >1 indicating identified functional impacts of larger effect. Significance tests are for specific paths in each path analysis, pair-wise for interacting phenotypes.
| neighbour plant trait | focal plant trait | phenotypic effect | genetic effect | identified : unidentified |
|---|---|---|---|---|
| pFLWR (+) | WT (+) | +0.193** | +0.127 | 1.521 |
| FLWR(+) | +0.240** | 1.890 | ||
| SILIQ (+) | −0.423** | 3.329 | ||
| BRANCH (+) | +0.214** | 1.689 | ||
| pBUD (+) | HT (−) | −0.161* | +0.122 | 1.321 |
| FLWR (+) | +0.311** | 2.557 | ||
| pBRANCH (+) | HT (−) | −0.179* | +0.151 | 1.182 |
| WT (+) | +0.131* | 0.865 | ||
| pLEAF (+) | HT (−) | −0.215** | +0.103 | 2.079 |
| BRANCH (+) | +0.206* | 1.995 | ||
| LEAF (+) | +0.133† | 1.281 |
*p < 0.05.
**p < 0.01.
†p < 0.10.