Incompatibility in Hazelnut

One S-locus, 30 alleles Co-dominance in Stigmas Dominance or Co-dominance in PollenFluorescence Microscopy

If the same allele is expressed by the stigma and the pollen, the cross is incompatible.

Incompatibility Testing

Incompatibility Testing using Fluorescence Microscopy

Compatible Incompatible Excellent germination Poor germination

Long parallel tubes Short tubes, bulbs