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タイトル: | Comparative analysis of spatial genetic structures in sympatric populations of two riparian plants,Saxifraga acerifoliaandSaxifraga fortunei |
著者: | Magota, Kana Sakaguchi, Shota https://orcid.org/0000-0002-6180-1747 (unconfirmed) Hirota, Shun K. Tsunamoto, Yoshihiro Suyama, Yoshihisa Akai, Kensei Setoguchi, Hiroaki |
著者名の別形: | 孫田, 佳奈 阪口, 翔太 瀬戸口, 浩彰 |
キーワード: | fragmented population habitat differentiation Japan landscape genetics local endemics Saxifraga Saxifragaceae sister species specialist species waterfall |
発行日: | Apr-2021 |
出版者: | Wiley |
誌名: | American Journal of Botany |
巻: | 108 |
号: | 4 |
開始ページ: | 680 |
終了ページ: | 693 |
抄録: | PREMISE: The genetic structure between plant populations is facilitated by the spatial population arrangement and limited dispersal of seed and pollen. Saxifraga acerifolia, a local endemic species in Japan, is a habitat specialist that is confined to waterfalls in riparian environments. Its sister species, Saxifraga fortunei, is a generalist that is widely distributed along riverbanks. Here, we examined sympatric populations of the two Saxifraga species to test whether the differences in habitat preference and colonization process influenced regional and local genetic structures. METHODS: To reveal genetic structures, we examined chloroplast microsatellite variations and genome-wide nucleotide polymorphisms obtained by genotyping by sequencing. We also estimated the gene flow among and within populations and performed landscape genetic analyses to evaluate seed and pollen movement and the extent of genetic isolation related to geographic distance and/or habitat differences. RESULTS: We found strong genetic structure in the specialist S. acerifolia, even on a small spatial scale (<1 km part); each population on a different waterfall in one river system had a completely different predominant haplotype. By contrast, the generalist S. fortunei showed no clear genetic differentiation. CONCLUSIONS: Our findings suggest that the level of genetic isolation was increased in S. acerifolia by the spatially fragmented habitat and limited seed and pollen dispersal over waterfalls. Habitat differentiation between the sister taxa could have contributed to the different patterns of gene flow and then shaped the contrasting genetic structures. |
著作権等: | This is the peer reviewed version of the following article: [Magota, K., Sakaguchi, S., Hirota, S. K., Tsunamoto, Y., Suyama, Y., Akai, K., and Setoguchi, H.. 2021. Comparative analysis of spatial genetic structures in sympatric populations of two riparian plants, Saxifraga acerifolia and Saxifraga fortunei. American Journal of Botany 108(4): 680– 693.], which has been published in final form at https://doi.org/10.1002/ajb2.1644. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. The full-text file will be made open to the public on 21 April 2022 in accordance with publisher's 'Terms and Conditions for Self-Archiving'. This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/267908 |
DOI(出版社版): | 10.1002/ajb2.1644 |
PubMed ID: | 33881773 |
出現コレクション: | 学術雑誌掲載論文等 |
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