Fig. 4
From: Patterns of introgression vary within an avian hybrid zone
Hypothesis testing for exogenous environmental factors of natural selection. The two panels depict the observed genetic composition of Saltmarsh and Nelson’s Sparrow adult males (white) and females (gray) across the inland (left) and coastal (right) sites (2016 & 2017 seasons). Genotypic classes in all panels: Nelson’s Sparrow (NESP), Backcrossed Nelson’s Sparrow (BC_NESP), F1/F2 (recent-generation hybrids), Backcrossed Saltmarsh Sparrow (BC_SALS), and SALS (Saltmarsh Sparrow) (*denotes significance at the 0.05 confidence level)