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Fruit setting after self-pollination, crosses and free-pollination appears to be erratic in the cultivated olive tree [Olea europaea subsp europaea L. (O. e. europaea L.)] because of a lack of a suitable model to enable prediction of rates. The same lack of prediction also applies to the wild taxon Olea europaea subsp cuspidata (O. e. cuspidata). Because of their close phylogenetic relationships,...
Self-fertility is largely decreased and even prevented by various mechanisms because, broadly, it causes inbreeding depression, although some species have retained self-reproduction regimes. Species of plants that display the self-incompatible sporophytic type of self-incompatibility may rarely self-pollinate. It is only possible in the absence of foreign compatible pollen. In the olive tree with...
The self-incompatibility type is of key importance to understanding pollination in orchards, because most olive cultivars are partially self-incompatible and thus require pollinizers to ensure fruit set. The gametophytic model has been advocated to function in the olive, but no allele pair has been attributed to any variety. The GSI model failed in most combinations to explain fruit set. Olive growers...
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