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Abstract Detail

Hybrids and Hybridization

Cho, Myong-suk [1], Kim, Chan-Soo [2], Kwon, Youl [1], Kim, Seung-Chul [1].

The origin of flowering cherry on oceanic islands: The saga continues in Jeju Island.

The role of gene flow in the origin and evolution of subgenus Cerasus in genus Prunus (Rosaceae) has been documented earlier in Jeju Island, Korea. Cho et al. (2014) provided the convincing evidence for the bidirectional and multiple hybrid origin of wild P. yedoensis in Jeju Island. However, the origin of cultivated P. x yedoensis (Somei-yoshino cherry), which is hypothesized as an artificial hybrid origin between P. spachiana f. ascendens and P. speciosa in Japan, and its relationship to wild P. yedoensis in Jeju Island, Korea remain highly controversial. As an ongoing attempt to determine the phylogenetic relationship between wild and cultivated P. yedoensis, we extensively sampled a total of 194 individuals for both wild and cultivated Prunus species in Japan, Russia and Korea, including the putative maternal (P. spachiana f. ascendens) and paternal (P. speciosa) parent of cultivated P. x yedoensis in Japan. The phylogenetic analysis of nrDNA ITS data was performed for 338 accessions including 144 ITS clones of amplicons from representative species. The ribotypes of wild P. yedoensis from Jeju Island clustered with those of either P. serrulata or P. sargentii, whereas the ribotypes of cultivated P. x yedoensis showed close relationship to those of P. speciosa. The cpDNA haplotype network analysis was also performed for a total of 105 individuals including wild and cultivated P. yedoensis as well as P. spachiana f. ascendens, using five cpDNA marker regions that can distinguish between wild and cultivated P. yedoensis based on whole cp genome sequencing. One haplotype was found in cultivated P. x yedoensis (Somei-yoshino cherry) and it was distantly related to genetically somewhat diverse wild P. yedoensis in Jeju Island. The cpDNA and nrDNA phylogenetic analyses are suggestive of independent origin between wild and cultivated P. yedoensis, respectively. The preliminary survey of 31 loci in Rosaceae Conserved Orthologous Set (RosCOS) further supports the hybrid origin of wild P. yedoensis, but the pollen donor remains yet to be determined.

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1 - Sungkyunkwan University, Department of Biological Sciences, 2066 Seobu-ro, Suwon, Gyeonggi-do, 16419, Korea
2 - Warm-Temperate and Subtropical Forest Research Center, 1253 Sanghyo-dong, Seogwipo, Jeju-do, 63582, Korea

flowering cherry
wild P. yedoensis
cultivated P. x yedoensis
gene flow
cpDNA haplotype network .

Presentation Type: Oral Paper
Session: 50, Hybrids and Hybridization
Location: 102/Savannah International Trade and Convention Center
Date: Wednesday, August 3rd, 2016
Time: 3:45 PM
Number: 50001
Abstract ID:71
Candidate for Awards:None

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