Being self-incompatible, most Asian plums should be planted with a compatible pollinizer to produce fruits. Therefore, the selection of an adequate pollinizer is essential when new plum cultivars are released. To select a suitable pollinizer for ‘Summer Fantasia’ plum, the S genotype, cross-compatibility, pollen viability, and flowering time of five candidate cultivars were evaluated. Using polymerase chain reaction (PCR) analysis, the S genotype of ‘Summer Fantasia’ was determined as SaSc, which was expected to be compatible with other S genotypes. To test cross-compatibility, the trees were covered with caging net to prevent unintended pollination, and pistils were hand pollinated without emasculation. Fruit set percentage was calculated 10 weeks after pollination. The fruit set percentage resulting from the cross between ‘Summer Fantasia’ and ‘Taiyo’ (SbSc) was 13.8%, whereas that resulting from other combinations was less than 5.0%. Pollen germination percentage was investigated to monitor pollen viability; it varied yearly among cultivars, although ‘Formosa’ (10.6%) and ‘Taiyo’ (13.8%) showed the highest pollen germination percentages among the cultivars. When averaged over three years and two locations, ‘Summer Fantasia’ bloomed 2–3 days after ‘Akihime’, ‘Formosa’, ‘Oishiwase’, and ‘Purple Queen’. Blooming period of ‘Summer Fantasia’ and ‘Taiyo’ overlapped almost entirely. Overall, the results indicated that ‘Taiyo’ was the most suitable pollinizer for ‘Summer Fantasia’.
Funding for this research was provided by a project (PJ010228202) of Rural Development Administration, Republic of Korea.
BeppuK.TakemotoY.YamaneH.YaegakiH.YamaguchiM.KataokaI.TaoR.2003Determination of S-haplotypes of Japanese plum (Prunus salicina Lindl.) cultivars by PCR and cross-pollination testsJ. Hort. Sci. Biotechnol.78315318
GoldwayM.ShaiO.YehudaH.MatityahuA.SternR.A.1999‘Jonathan’ apple is a lower-potency pollenizer of ‘Topred’ than ‘Golden Delicious’ due to partial S-allele incompatibilityJ. Hort. Sci. Biotechnol.74381385
IkedaK.WatariA.UshijimaK.YamaneH.HauckN.R.IezzoniA.F.TaoR.2004Molecular markers for the self-compatible S4′-haplotype, a pollen-part mutation in sweet cherry (Prunus avium L.)J. Amer. Soc. Hort. Sci.129724728
JunJ.H.KwonJ.H.ChungK.H.2007Identification of self-incompatibility genotypes in Japanese plum (Prunus salicina Lindl.) by polyemrase chain reaction and cross-pollination testHort. Environ. Biotechnol.48228234
VilanovaS.RomeroC.AbernathyD.AbbottA.G.BurgosL.LlacerG.BadenesM.L.2003Construction and application of a bacterial artificial chromosome (BAC) library of Prunus armeniaca L. for the identification of clones linked to the self-incompatibility locusMol. Genet. Genomics269685691
WatariA.HanadaT.YamaneH.EsumiT.TaoR.YaegakiH.YamaguchiM.BeppuK.KataokaI.2007A low transcriptional level of Se-RNase in the Se-haplotype confers self-compatibility in Japanese plumJ. Amer. Soc. Hort. Sci.132396406