Fruit set from self-pollination averaged 67% in 4x highbush type complex (blueberry cultivars derived from at least 5 species including Vaccinium corymbosum L.) as compared to 18% in 6x rabbiteye (V. ashei Reade) cultivars. Fruit set from cross-pollination within highbush averaged 82% as compared to 47% in rabbiteye. Seed per berry from self-pollination averaged 3.9 in highbush and 1.5 in rabbiteye. Seed per berry from cross-pollination within highbush averaged 11.2 as compared to 8.5 within rabbiteye. Cross-pollination is desirable for maximum fruit set in both highbush and rabbiteye but appears especially critical in rabbiteye.
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