Variety traits

Self-fertility — Common hazel

Corylus avellana L.

Common hazel is characterized by sporophytic self-incompatibility, which causes most cultivars to be self-infertile. This necessitates the careful selection of pollinators to ensure fruit set and prevent the formation of empty nuts.

In the reference 69 varieties crop Common hazel, where this is mentioned in the description.

Common hazel exhibits sporophytic self-incompatibility, a condition where a plant is unable to effectively fertilize itself with its own pollen. For scientific purposes, this trait is evaluated through controlled pollination, fluorescence microscopy of pollen tubes, and fruit set assessment, where values of 75–90% under self-pollination indicate the presence of self-compatibility.

In commercial hazelnut cultivation, self-incompatibility and pronounced dichogamy make cross-pollination a mandatory condition for yield. The agrotechnical scheme requires planting pollinators, which should account for at least 10% of the total number of plants and must coincide with the main cultivar in flowering time to minimize the risk of developing empty nuts.

General information about the subject — on the page Self-fertility.

Sources8

Varieties of Common hazel mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.