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A new record of Ardisia×walkeri, a hybrid of A. japonica and A. pusilla, (Primulaceae) from Jeju Island, Korea

Journal of Species Research / Journal of Species Research, (E)2713-8615
2023, v.12 no.3, pp.258-265
https://doi.org/10.12651/JSR.2023.12.3.258
Chikako Ishii
Satoshi Kakishima
Chan-Ho Park
Takuro Ito
Atsushi Abe
Goro Kokubugata (National Museum of Nature and Science)
Gwanpil Song
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Abstract

We conducted phylogenetic analyses using multiplexed inter-simple sequence repeat genotyping by sequencing and compared chloroplast DNA sequences among Ardisia japonica, A. pusilla, and morphologically intermediate plants found on Jeju Island, Korea. Our network analysis demonstrated that the intermediate plants were genetically positioned between A. japonica and A. pusilla. Our comparison of the intergenic spacer between the psbA and trnH genes in chloroplast DNA indicated that four nucleotide substitutions separate A. japonica and A. pusilla, whereas the intermediate plants exhibited the A. japonica haplotype. Our results suggest that the intermediate plants on Jeju Island represent a natural hybrid of A. japonica, as the maternal species, and A. pusilla, and that they are attributable to Ardisia×walkeri. This record constitutes the first documented occurrence of the hybrid taxon in Korea.

keywords
cpDNA, hybridization, Jeju Island, Korea, MIGseq

Journal of Species Research