Patterns of evolution at the gametophytic self-incompatibility Sorbus aucuparia (Pyrinae) S pollen genes support the non-self recognition by multiple factors model - Aguiar, B.; Vieira, J.; Cunha, A.E.; Fonseca, N.A.; Reboiro-Jato, D.; Reboiro-Jato, M.; Fdez-Riverola, F.; Raspé, O.; Vieira, C.P. (Journal of Experimental Botany, 2013)