- 著者
- Koji Takayama Chie Tsutsumi Dairo Kawaguchi Hidetoshi Kato Tomohisa Yukawa
- 出版者
- The Japanese Society for Plant Systematics
- 雑誌
- Acta Phytotaxonomica et Geobotanica (ISSN:13467565)
- 巻号頁・発行日
- vol.70, no.3, pp.149-158, 2019-10-31 (Released:2019-11-28)
Liparis hostifolia (Orchidaceae) on Minami-iwo-to Island in the Bonin (Ogasawara) Archipelago was rediscovered for the first time in 79 years during a field survey in 2017. Its identity was confirmed by morphological comparison and DNA extractions from herbarium specimens collected between 1914 and 1938. Results from the molecular phylogenetic analyses demonstrated that L. hostifolia belongs to the L. makinoana complex. In comparison with other members of the L. makinoana complex, the broadly ovate labellum, short dormancy period, and flowering from November to March are unique characteristics of L. hostifolia. Results from the molecular phylogenetic analyses also suggested that L. hostifolia has had a long-isolated history in the Bonin Archipelago and probably migrated from temperate East Asia.
- 著者
- Wita Yulianti Saeko Katoh Norimasa Sugita Goro Kokubugata Hidetoshi Kato Noriaki Murakami
- 出版者
- The Japanese Society for Plant Systematics
- 雑誌
- Acta Phytotaxonomica et Geobotanica (ISSN:13467565)
- 巻号頁・発行日
- vol.73, no.1, pp.1-18, 2022-02-28 (Released:2022-03-25)
Invasive alien species are serious threats to the biota of the Ogasawara Islands, and Morus australis is one of them. To clarify the invasion routes and the genetic composition of the founding populations, plant samples were collected from 32 populations of M. australis from Japan, including 12 from the Ogas- awara Islands, for population genetic analyses using 14 microsatellite markers. The UPGMA dendro- gram based on Nei’s genetic distance, Principal Coordinate Analysis based on pairwise F ST values, and Bayesian Clustering using STRUCTURE software indicated that the populations of M. australis in the Ogasawara Islands are genetically similar to those in the Ryukyu Islands, but clearly differentiated from those in the Izu Islands and mainland of Japan. The level of genetic diversity in the Ogasawara Islands (A R = 4.24; H E = 0.60) was similar to that in the Ryukyu Islands (A R = 4.70; H E = 0.66). The findings from this study strongly suggested that M. australis plants now in the Ogasawara Islands are descendants of those introduced from the Ryukyu Islands; the numbers of transplanted individuals from the Ryukyu Islands were large. Such high genetic diversity may have enhanced the invasiveness of M. australis in the Ogasawara Islands.