Toxin resistance in the monarch butterfly expanded its milkweed host range
Naama C. Weksler, Michael Astourian, Derrick Yip, Elizabeth Ordeman, Kirsten Isabel Verster, Boris Korablev, Susan L. Bernstein, Anurag A Agrawal, Noah Kerness Whiteman, Marianthi Karageorgi
This study shows that toxin resistance in monarch butterflies allowed them to expand their milkweed host range by enabling survival on a broader range of cardenolide-defended plants.
bioRxiv · May 26, 2026 · PreprintEvolutionary Biology