SELF-COMPATIBILITY EXPRESSION IN ALMOND BY POLLEN TUBE GROWTH

Pollen tube growth has been an important criterion for self-compatibility evaluation in almond.
However, the success of pollen tube growth seems to be modulated by genetic and environmental factors which produce a not clear-cut separation between a successful and an unsuccessful pollination in the different genotypes.
Pollen tube growth was evaluated after selfing the seedlings from the cross G-4-3 (S_fS₁₁) × ‘Marcona’ (S₁₁S₁₂) and the individuals were rated according to their self-compatibility index.
The seedlings had different levels of compatibility, not allowing a clear qualitative separation between self-compatible and self-incompatible genotypes neither their classification in relation to the presence or not of the S_f allele.
Consequently, the correlation between pollen tube growth and self-compatibility may be related to the presence of pseudo-self-compatibility in almond and to the effect of QTLs affecting the expression of self-compatibility.

VI International Symposium on Almonds and Pistachios

R. Socias i Company, A. Fernández i MartíFernández i Martí, O. Kodad, J.M. Alonso

almond, Prunus amygdalus Batsch, self-compatibility, pollen tube growth, breeding, S alleles

https://doi.org/10.17660/ActaHortic.2014.1028.18