Hertzsprung-Russell diagram containing the γ Dor and SPB stars studied in this work. The γ Dor instability strips are from Dupret et al. (2005), for α_mlt = 1.5 (orange) andα_mlt = 2.0 (blue), while the SPB instability strip (green) is taken from Szewczuk & Daszyńska-Daszkiewicz (2017). All these strips were computed for solar metallicity. The red crosses are hybrid γ Dor - δ Sct stars, and the black pluses are SB1 stars. Evolutionary tracks for different masses taken from (Johnston et al. 2019) and covering from zero age- to the terminal-age main sequence are plotted as black dashed lines to guide the eye.