Mayu Katafuchi, Satoshi Narita, Yoshiteru Komaki, Atsushi J. Nagano, Tomohisa Yukawa, Yoshihisa Suyama, Shun K. Hirota, Michimasa Yamasaki, Yuji Isagi
{"title":"综合遗传分析揭示了小笠原群岛特有物种--Calanthe hoshii(兰科)的遗传结构和多样性:对适当保护极度濒危物种的影响","authors":"Mayu Katafuchi, Satoshi Narita, Yoshiteru Komaki, Atsushi J. Nagano, Tomohisa Yukawa, Yoshihisa Suyama, Shun K. Hirota, Michimasa Yamasaki, Yuji Isagi","doi":"10.1111/1442-1984.12479","DOIUrl":null,"url":null,"abstract":"The Ogasawara Islands, isolated from the continent throughout their geological history, harbor abundant endemic species. However, 32% of the native plant species are on the Japanese Red List, signaling their endangered status. Among these endangered species, <jats:italic>Calanthe hoshii</jats:italic> stands out as highly susceptible to extinction. Two wild and 89 ex situ individuals were alive in 2020, but the last known wild individual died in October 2021, indicating this species may have become extinct in the wild. Despite the conservation efforts under the Act for the Conservation of Endangered Species of Wild Fauna and Flora, the lack of essential information regarding genetic diversity and population structure among the remaining individuals poses a significant obstacle to developing effective conservation measures. In this research, we conducted a genetic analysis of the wild and ex situ individuals, which revealed notably reduced genetic diversity between individuals, with individual heterozygosity levels (1.0 × 10<jats:sup>−5</jats:sup>) measuring one‐ninth of those observed within a closely related species <jats:italic>Calanthe triplicata</jats:italic> (1.5 × 10<jats:sup>−4</jats:sup>). Comprehensive genetic analysis revealed that <jats:italic>C. hoshii</jats:italic> consisted of three genetic clusters of different sizes: cluster 1 comprised 95% of the total population, while clusters 2 and 3, with few individuals, were only found in the ex situ populations at Koishikawa Botanical Garden. Since extant <jats:italic>C. hoshii</jats:italic> maintains a remarkably low genetic diversity at both individual and population levels, it is necessary to consider future management strategies, such as artificial breeding among different clades identified in this study, to safeguard the stability and resilience of this species.","PeriodicalId":54601,"journal":{"name":"Plant Species Biology","volume":null,"pages":null},"PeriodicalIF":1.1000,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Comprehensive genetic analysis reveals the genetic structure and diversity of Calanthe hoshii (Orchidaceae), an endemic species of the Ogasawara Islands: Implications for appropriate conservation of a critically endangered species\",\"authors\":\"Mayu Katafuchi, Satoshi Narita, Yoshiteru Komaki, Atsushi J. Nagano, Tomohisa Yukawa, Yoshihisa Suyama, Shun K. Hirota, Michimasa Yamasaki, Yuji Isagi\",\"doi\":\"10.1111/1442-1984.12479\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The Ogasawara Islands, isolated from the continent throughout their geological history, harbor abundant endemic species. However, 32% of the native plant species are on the Japanese Red List, signaling their endangered status. Among these endangered species, <jats:italic>Calanthe hoshii</jats:italic> stands out as highly susceptible to extinction. Two wild and 89 ex situ individuals were alive in 2020, but the last known wild individual died in October 2021, indicating this species may have become extinct in the wild. Despite the conservation efforts under the Act for the Conservation of Endangered Species of Wild Fauna and Flora, the lack of essential information regarding genetic diversity and population structure among the remaining individuals poses a significant obstacle to developing effective conservation measures. In this research, we conducted a genetic analysis of the wild and ex situ individuals, which revealed notably reduced genetic diversity between individuals, with individual heterozygosity levels (1.0 × 10<jats:sup>−5</jats:sup>) measuring one‐ninth of those observed within a closely related species <jats:italic>Calanthe triplicata</jats:italic> (1.5 × 10<jats:sup>−4</jats:sup>). Comprehensive genetic analysis revealed that <jats:italic>C. hoshii</jats:italic> consisted of three genetic clusters of different sizes: cluster 1 comprised 95% of the total population, while clusters 2 and 3, with few individuals, were only found in the ex situ populations at Koishikawa Botanical Garden. Since extant <jats:italic>C. hoshii</jats:italic> maintains a remarkably low genetic diversity at both individual and population levels, it is necessary to consider future management strategies, such as artificial breeding among different clades identified in this study, to safeguard the stability and resilience of this species.\",\"PeriodicalId\":54601,\"journal\":{\"name\":\"Plant Species Biology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2024-07-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Plant Species Biology\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.1111/1442-1984.12479\",\"RegionNum\":4,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"ECOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plant Species Biology","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1111/1442-1984.12479","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ECOLOGY","Score":null,"Total":0}
Comprehensive genetic analysis reveals the genetic structure and diversity of Calanthe hoshii (Orchidaceae), an endemic species of the Ogasawara Islands: Implications for appropriate conservation of a critically endangered species
The Ogasawara Islands, isolated from the continent throughout their geological history, harbor abundant endemic species. However, 32% of the native plant species are on the Japanese Red List, signaling their endangered status. Among these endangered species, Calanthe hoshii stands out as highly susceptible to extinction. Two wild and 89 ex situ individuals were alive in 2020, but the last known wild individual died in October 2021, indicating this species may have become extinct in the wild. Despite the conservation efforts under the Act for the Conservation of Endangered Species of Wild Fauna and Flora, the lack of essential information regarding genetic diversity and population structure among the remaining individuals poses a significant obstacle to developing effective conservation measures. In this research, we conducted a genetic analysis of the wild and ex situ individuals, which revealed notably reduced genetic diversity between individuals, with individual heterozygosity levels (1.0 × 10−5) measuring one‐ninth of those observed within a closely related species Calanthe triplicata (1.5 × 10−4). Comprehensive genetic analysis revealed that C. hoshii consisted of three genetic clusters of different sizes: cluster 1 comprised 95% of the total population, while clusters 2 and 3, with few individuals, were only found in the ex situ populations at Koishikawa Botanical Garden. Since extant C. hoshii maintains a remarkably low genetic diversity at both individual and population levels, it is necessary to consider future management strategies, such as artificial breeding among different clades identified in this study, to safeguard the stability and resilience of this species.
期刊介绍:
Plant Species Biology is published four times a year by The Society for the Study of Species Biology. Plant Species Biology publishes research manuscripts in the fields of population biology, pollination biology, evolutionary ecology, biosystematics, co-evolution, and any other related fields in biology. In addition to full length papers, the journal also includes short research papers as notes and comments. Invited articles may be accepted or occasion at the request of the Editorial Board. Manuscripts should contain new results of empirical and/or theoretical investigations concerning facts, processes, mechanisms or concepts of evolutionary as well as biological phenomena. Papers that are purely descriptive are not suitable for this journal. Notes & comments of the following contents will not be accepted for publication: Development of DNA markers. The journal is introducing ''Life history monographs of Japanese plant species''. The journal is dedicated to minimizing the time between submission, review and publication and to providing a high quality forum for original research in Plant Species Biology.