Hybridization is a major evolutionary force that can erode genetic differentiation between species. whereas reproductive isolation maintains such differentiation. In studying a hybrid zone between the swallowtail butterflies Papilio syfanius and Papilio maackii (Lepidoptera: Papilionidae). we made the unexpected discovery that genomic substitution rates are unequal between the parenta... https://www.roneverhart.com/2-1-2-x-1-4-x-36-Smooth-Saddle-Threshold-NGP-410-36/