A. m. striatum- and A. m. pseudomajus -like fathers were more likely to sire offspring with mothers towards the East and West of the hybrid zone respectively than would be expected under random mating and plausible dispersal distances (figure \ref{209441}). In the Western-most spatial bin, maternal plants were 5.2- and 3.0-fold more likely to receive pollen from ros/ros and sulf/sulf pollen donors respectively, but 2.1- and 1.6-fold less likely to receive pollen from ROS/ROS and S/+ donors, than would be expect chance given local genotype frequencies. This pattern reverse around the centre of the hybrid zone, and by the 300-600 bin, maternal plants were 1.3- and 1.1-fold more likely to receive pollen from ROS/ROS and SULF/+ plants respectively, but 1.7- and 1.3-fold less likely to receive pollen from ros/ros and sulf/sulf donors. In the Eastern-most spatial bin there were no significant differences between observed and expected siring probabilities between paternal genotypes, but this bin contained only three plants. There were no clear differences in observed and expected probabilities of receiving pollen from ROS/ros pollen donors across the hybrid zone. These results indicate that parental genotypes have increased pollen export on the sides of the hybrid zone where they are dominant.