SELF-COMPATIBILITY IN THE JAPANESE PLUM CULTIVAR ‘HONEY ROSA’

Self-compatibility and segregation for S-haplotype in progenies in Japanese plum (Prunus salicina Lindl.) cultivar ‘Honey Rosa’ (S^bS^g), recently released from the National Institute of Fruit Tree Science, Japan, were investigated.
The fruit set rate of five ‘Honey Rosa’ trees after self-pollination was 11.2% on average.
This result confirmed that ‘Honey Rosa’ is self-compatible.
The progenies of the self-pollination segregated into two S-haplotypes, S^bS^b and S^bS^g, suggesting that the S^b-haplotype is responsible for self-compatibility.
Expression analysis of S-RNase showed that the S^b-RNase gene was transcribed in the style.
Therefore, it appeared that inhibition of transcription of the S-RNase gene is not responsible for the self-compatibility in the S^b-haplotype of ‘Honey Rosa’.

IX International Symposium on Plum and Prune Genetics, Breeding and Pomology

K. Beppu, I. Endo, I. Kataoka

Prunus salicina, self-compatible, self-pollination, S-haplotype, S-RNase

https://doi.org/10.17660/ActaHortic.2010.874.21