Fig. S5.
Synthetic tetraploid A. lyrata restores hybrid seed viability similar as natural tetraploids. (A) Pictures of seeds obtained from controlled crosses between synthetic 4x A. lyrata and diploid A. arenosa. The directionality of the cross is indicated seed parent (♀) × pollen donor (♂). (Scale bars, 1 mm.) (B) Seed viability of interploidy interspecific crosses, as measured by the rate of noncollapsed and germinated seeds. (C) Seed size for indicated crosses. (D) Seed weight for indicated crosses. Error bars represent SD between cross replicates (>2 replicates for each sample). 2A: 2x A. arenosa; 4Lsynth: synthetic 4x A. lyrata.