Sequence Analysis of New S-RNase and SFB alleles in Japanese Apricot (Prunus mume)

As with other self-incompatible Prunus species, cultivars of Japanese apricot (Prunus mume Sieb. et Zucc.) display the S-RNase-based gametophytic self-incompatibility system. In this study, S-genotypes of ten Japanese apricot cultivars native to China were subjected to polyacrylamide gel electrophoresis (PAGE) analysis using an efficient Prunus S-RNase primer pair, Pru-C2 and PCE-R. In addition, three new S-RNase genes (S (34) , S (35) and S (36) -RNase) and six new SFB genes (PmSFB14, PmSFB18, PmSFB22, PmSFB24, PmSFB31 and PmSFB34) were identified and their sequences were characterized and deposited in the GenBank database.