Figure 1.
Schematics of the interspecific crosses between RS (S6S13′ S26Sa) and Gold (S3S6) and the self-pollination of RS. (A) Pollination of RS styles with Gold pollen results in the rejection of all pollen containing the S6-haplotype. Pollen containing the S3-haplotype is successful. (B) Pollination of Gold styles with RS pollen results in the rejection of all pollen containing the S6-haplotype. Any pollen that does not contain the S6-haplotype is successful. Because sour cherry exhibits homologous and occasional nonhomologous pairing (Beaver and Iezzoni 1993), all possible chromosome-pairing configurations are considered. Pollen types formed by homologous pairing are shaded. (C) Self-pollination of RS results in rejection of all pollen containing either S6 or S26 or both. The only successful pollen is S13′Sa.