Sweet cherries are self-incompatible and cannot be fertilized by their own pollen. A gametophytic self-incompatibility (GSI) system determines fertility in sweet cherries and prevents pollination with own and genetically related pollen.
This mechanism is controlled by a multi-allelic S-locus coding for two genes involved in fertilization: the S-allele-specific ribonuclease (S-RNase) expressed in the female style and the S-specific F-box protein (SFB) in the male pollen. Since the beginning of the 20th century, systematic studies have been carried out to describe the fertilization relationships between sweet cherry cultivars.
Since then, information on the S-genotypes of sweet cherry cultivars has been constantly increasing. This information is very important for cherry growing, breeding, and breeding research. The S-genotypes of sweet cherry cultivars were collected by evaluating S-allele studies described in the literature. The S-genotypes of 1,700 sweet cherry accessions were recorded.
A summary of all the results of S-genotyping in sweet cherries can be found in "Self-incompatibility (S) genotypes of cultivated sweet cherries – An overview 2023-Update" published in the OpenAgrar repository, https://doi.org/10.5073/20230302-143854-0
Mirko Schuster, Susan Schröpfer, Henryk Flachowsky
Institute for Breeding Research on Fruit Crops, Julius Kühn-Institut (DE)
12 May 2023
WSUO, in addition to Kordia, has commercially propagated 28 cherry varieties. The best known are Early Korvik, Christiana, Felicita, Irena, Justyna, Kasandra, Tamara, Techlovan, Tim and Vanda.
31 May 2024
Emilia Muratori, the mayor of Vignola, explained that the concession for the remaining concessionaire will expire in 2025, and at the moment there are no signs of giving up: ‘We will let the cherry season pass and then make a decision on the empty space'.
12 Jan 2026
Meda Swan (IVU 514®) is a new early two-coloured cherry variety, selected in California, tested and distributed in Chile. It ripens 10 days earlier than Rainier, has excellent Brix levels and good post-harvest keeping quality and tolerance to storage defects.
12 Jan 2026
DNA analysis conducted in China revealed that cherries exported from Chile under the Rose Rainier label were genetically identical to the patented Tip Top variety (Skylar Rae®). ANA Chile® and Tip Top Orchards LLC. announced legal action to protect varietal rights.
