Extended Data Fig. 7: Pollen tube growth assays confirm self-incompatibility in DH-1 and DH-2.
From: Generating self-incompatible hybrid potatoes through haploid breeding

Pollen tubes can reach ovules in YS1 (left panel), while they fail to reach ovules in DH-1 (middle panel) and DH-2 (right panel). Red arrowheads indicate the ends of pollen tubes. Two repeats were conducted independently with similar results.