Positions and effects of QTL located on chromosomes one, three, five and six.

Notes:1The position of the nearest marker to the maximum LOD with the QTL region.2The additive genetic effect reflects a) the magnitude of the allele effect on aphid fitness at the point of maximum LOD, b) which parental allele produced the significant QTL, positive AGE = the OWB-D and negative AGE = OWB-R.3The consequence of the OWB-D allele on the rhizobacteria-aphid indirect effect compared to the OWB-R allele in the environment where the QTL was significant.*QTLxE on chromosome 1, p = 0.0018.