Stebbins and Edgar Anderson wrote a paper in 1954 on the importance of hybridization in adapting to new environments, they proposed novel adaptations would facilitate the invasion of habitats not utilized previously by either parent and that novel adaptations may facilitate the formation of stabilized hybrid species.
Novel adaptations would facilitate the invasion of habitats not utilized previously by either parent and that novel adaptations may facilitate the formation of stabilized hybrid species. This was what they proposed.