Kawakita Haruna, Sakaguchi Shota, Katoh Saeko, Kato Hidetoshi, Tanaka Takefumi, Komaki Yoshiteru, Ideno Takahito, Setoguchi Hiroaki
Graduate School of Human and Environmental Studies Kyoto University Kyoto Japan.
Department of Biological Science, Graduate Schools of Science and Engineering Tokyo Metropolitan University Tokyo Japan.
Ecol Evol. 2024 Oct 30;14(11):e70506. doi: 10.1002/ece3.70506. eCollection 2024 Nov.
The Ogasawara Islands, representing an oceanic island ecosystem in Japan, have a notably high rate of endemic species akin to other oceanic islands globally. is a critically endangered shrub with only four remaining individuals in its natural habitat on the Ogasawara Islands. Current conservation efforts encompass both in situ and ex situ approaches for . However, these efforts face challenges stemming from the lack of critical conservation information. Therefore, we explored 's genetic diversity and implications for conservation. We utilized simple sequence repeat markers to scrutinize genetic diversity within both in situ and ex situ populations, revealing notably rich diversity among both. The in situ genetic diversity was significantly high despite the few extant individuals. In addition, many of the ex situ peculiar genotypes were absent in individuals conserved in situ. This investigation also provides insights into the reproductive strategies and combinations of selfing and outcrossing. The results of the present study recommend conservation to maximize genetic diversity in by promoting cross-pollination among in situ individuals and by introducing individuals with unique genotypes into ex situ stocks.
小笠原群岛是日本一个海洋岛屿生态系统，与全球其他海洋岛屿一样，特有物种的比例极高。[物种名称]是一种极度濒危的灌木，在小笠原群岛的自然栖息地中仅剩下四个个体。目前的保护工作包括对[物种名称]的原地保护和迁地保护。然而，这些努力面临着缺乏关键保护信息的挑战。因此，我们探索了[物种名称]的遗传多样性及其对保护的意义。我们利用简单序列重复标记来研究原地和迁地种群的遗传多样性，结果显示两者都具有显著丰富的多样性。尽管现存个体数量很少，但原地遗传多样性仍然显著较高。此外，许多迁地特有的基因型在原地保存的个体中并不存在。这项研究还深入了解了其繁殖策略以及自交和异交的组合情况。本研究结果建议通过促进原地个体间的异花授粉以及将具有独特基因型的个体引入迁地种群来进行保护，以最大限度地提高[物种名称]的遗传多样性。
