ISHS Acta Horticulturae 800: X International Pear Symposium
UNDERSTANDING THE GAMETOPHYTIC SELF-INCOMPATIBILITY SYSTEM AND ITS IMPACT ON EUROPEAN PEAR (PYRUS COMMUNIS L.) CULTIVATION |
| Authors: | M. Goldway, A. Zisovich, A. Raz, R.A. Stern |
| Keywords: | self incompatibility, S-RNase, SFB, pollination |
| DOI: | 10.17660/ActaHortic.2008.800.9 |
| Abstract:
The current understanding of the RNase-mediated GSI system in pears is presented. A practical out come of the GSI research is the ability to molecularly S-genotype cultivars of the Rosaceae botanical family based on their S-RNase genes and on their SFB genes (identified in Japanese pear but not in European pear). It was found that in many cases the cultivar couples in the orchards are genetically semi-compatible and not fully compatible, with each other. Semi-compatibility was shown to correlate with low yield. In Israel the main European pear cultivar 'Spadona' is semi-compatible with its three pollenizers 'Coscia', 'Gentile' and 'Spadnochina' and provides low yield probably because of pollen deficiency. The wild pear Pyrus syriaca is expected to carry different S-genotypes than the European pear cultivars and therefore could be a "universal pollenizer". We examined the fruit set of 'Sapdona' pollenized by Pyrus syriaca. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
