Silene as a model system in ecology and evolution. by Bernasconi, G, Antonovics, J, Biere, A, Charlesworth, D, Delph, L, Filatov, D, Giraud, T, Hood, M, Marais, G, McCauley, D, Pannell, J, Shykoff, J, Vyskot, B, Wolfe, L, Widmer, A