POLLEN INCOMPATIBILITY IN PORTUGUESE HAZELNUT LANDRACES

Self-incompatibility is a mechanism that prevents self-fertilization and encourages fertilization by genetically unrelated individuals.
The control of self-incompatibility is generally attributed to a single S-locus expressing multiple alleles.
In hazelnut incompatibility is determined sporophytically and it is controlled by a single locus with multiple alleles.
The allelic forms of six Portuguese hazelnut landraces were studied.
The landraces were selected from the Viseu and Moimenta da Beira regions.
Fifteen pollen testers, with known S-alleles, were used to determine the incompatibility alleles.
All landraces showed compatibility for S₁, S₇, S₉, S₁₀, S₁₂, S₁₄, S₁₆, S₁₈, S₂₆, S₂₇, S₂₉, and S₃₀ alleles, thus, these landraces have not these alleles in their genotype.
Five landraces revealed incompatibility for one of the fifteen alleles evaluated.
Three landraces, all from Viseu, revealed incompatibility for the S₂ allele, which means that they have the S₂ allele in their genotype.

XXVIII International Horticultural Congress on Science and Horticulture for People (IHC2010): International Symposium on Plant Physiology from Cell to Fruit Production System

S. Martins, M. Rovira, A.P. Silva, V. Carnide

S-alleles, Corylus avellana L., germplasm

https://doi.org/10.17660/ActaHortic.2012.932.22