“…Studies of selection on self-pollination have estimated current levels of inbreeding depression, pollen discounting, and seed discounting (Busch & Delph, 2012;Husband & Schemske, 1996;Layman, Fernando, Herlihy, & Busch, 2017;Rausher, Augustine, & Vanderkooi, 1993), and whether selfing is favored in conditions of pollen or pollinator limitation (Briscoe Runquist, Geber, Pickett-Leonard, & Moeller, 2017;Fishman & Willis, 2008;Gervasi & Schiestl, 2017;Moeller & Geber, 2005;Roels & Kelly, 2011;Strandh et al, 2017;Toräng et al, 2017). However, we know of fewer direct demonstrations of overall selection favoring selfing, although a recent study in Leavenworthia found molecular signatures consistent with positive selection on the S-locus (Herman & Schoen, 2016).…”