ISHS Acta Horticulturae 538: Eucarpia symposium on Fruit Breeding and Genetics
ANALYSIS OF S-ALLELE GENOTYPES AND GENETIC DIVERSITY IN THE APPLE |
| Authors: | S. Komori, J. Soejima, K. Abe, N. Kotoda, H. Kato |
| Keywords: | Malus x domestica, S-genotypes, incompatibility, breeding |
| DOI: | 10.17660/ActaHortic.2000.538.9 |
| Abstract:
The existence of 9 alleles (Sa - Si) were recognized by pollination test in the apple. The cultivars, which were bred in Japan, consist of 9 to 12 S-allele combinations including undetermined S-alleles. The results from the investigation of perentage indicated that there are 486 to 648 S-alleles in 1165 cultivars and strains. Therefore, sufficient genetic diversity is present in the apple. However, a few cultivars were successful for breeding materials because about 55% of the investigated cultivars derived from the twelve cultivars. These facts suggested past excessive inbreeding. In a forward-looking apple breeding plan, we need to adopt many unused breeding materials, and we need to breed new ones with moderate quality and sufficient genetic diversity. | |
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