ISHS Acta Horticulturae 667: IV International Cherry Symposium
CROSS-COMPATIBILITY STUDIES IN SOME HUNGARIAN SWEET CHERRY HYBRIDS |
| Authors: | ZS. Békefi, S. Brózik |
| Keywords: | Prunus avium, pollination, fruit set, self-fertility, pollen tube, universal donor |
| Abstract:
A sweet cherry fertilization experiment was begun with 6 maternal and 7 pollen partners (Hungarian sweet cherry selections plus ‘Stella’). Self-fertility was determined by analyzing fruit set after unassisted self-, hand-self- and open-pollination in 1999 and 2001. Among the presumably self-fertile pollinizers, only ‘IV-6/240’ seemed to be self-sterile. Compatibility relationships were assessed over 2 years for 20 combinations in which the maternal cultivars were self-sterile and the pollinators self-fertile. The combinations resulting in 10% or more fruit set were considered to be compatible. Of these, 5 combinations were fully compatible, while 7 were clearly incompatible. There were some contradictory results in 8 test-cross combinations, probably for cold weather conditions during 2001 bloom, which therefore should be repeated. In 2000 and 2001, pollen tube growth was examined for two combinations (‘Margit’ x ‘Alex’ and ‘Germersdorfi 3’ x ‘Alex’) in which incompatibility of these partners was confirmed. Some self-fertile hybrids/cultivars, even ‘Stella’, were poor pollinizers in certain combinations. This contradicts the premise that self-fertile cultivars are universal pollen donors. | |
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