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.