Figure 7.

Examination of the requirement for a balanced maternal: paternal genomic ratio in the endosperm of apomictically derived seeds in four cytotypes of Potentilla puberula. Generalized linear mixed models revealed a significant relation between seed set and Δ p (averaged for each flower), that is, the deviation of the observed number of parental genomes in the endosperm from the balanced number (4m:2p), for pentaploids (p = .002), but not for hexa‐, hepta‐, and octoploids (p = .915, .364 and .518). Headings indicate the ploidy level of the pollen recipient. Black and white dots illustrate flowers subjected to homoploid and heteroploid crosses, respectively