Fig. 4.

Comparisons of seed set under four pollination treatments in two distylous species (A: Fagopyrum dibotrys, B: F. esculentum) and three pollination treatments in two homostylous (C: F. gracilipes, D: F. tataricum) species of Fagopyrum. Control = open pollination, Inter = inter-morph cross pollination, Intra = intra-morph cross pollination, Self = self-pollen pollination, Cross = cross pollen pollination. Numbers on the columns are the sample sizes for each treatment. Different letters indicate significant difference at P < 0.05 under generalized linear models (GLMs).