ISHS Acta Horticulturae 667: IV International Cherry Symposium
A PRELIMINARY STUDY ON PHYSIOLOGICAL AND S-ALLELE SPECIFIC BREAKDOWN OF SELF-INCOMPATIBILITY IN SWEET CHERRY |
| Authors: | C. Choi, R.L. Andersen |
| Keywords: | Prunus avium, pollen compatibility, self-fertility, S-genotypes, temperature |
| Abstract:
Among the S-genotypes in sweet cherry, the highest frequency of self-incompatibility breakdown was found in S3S4 genotypes (>3% fruit set when self-pollinated). However, the frequency of breakdown (expressed as either fruit set or pollen tube growth rate) did not differ among cultivars within the same S-genotype combination. Depending on different temperatures from 10 to 25 °C, breakdown (expressed as unrestricted pollen tube growth) ranged from about 0 to 25 % in self- or cross-incompatible pollinations of all S-genotypes combinations. The S3S4 genotypes almost always had the highest breakdown frequency at all temperatures. However, no specific S-allele alone was associated with the increased incidence of self-incompatibility breakdown. | |
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