Journal of Plant Research

, 122:585 | Cite as

Genetic population structure of Osmunda japonica, rheophilous Osmunda lancea and their hybrids

  • Yoko YatabeEmail author
  • Chie Tsutsumi
  • Yumiko Hirayama
  • Keigo Mori
  • Noriaki Murakami
  • Masahiro Kato
Regular Paper


Rheophilous Osmunda lancea often hybridizes with a dryland ally, Osmunda japonica, to produce O. × intermedia, forming zonation in riverbanks and the adjacent dryland along flooding frequency clines. This study examined the genetic structure of populations consisting of O. × intermedia and the two parental species by analyzing ten nuclear DNA markers [six cleaved amplified polymorphic sequence (CAPS) markers and three simple sequence repeat (SSR) markers developed from an expressed sequence tag (EST) library, and the sequence of the glyceraldehyde-3-phosphate dehydrogenase gene GapCp] and chloroplast DNA sequences. The results suggest that the nuclear genes of O. japonica and O. lancea are genetically differentiated despite shared polymorphism in their chloroplast DNA sequences. This discrepancy may be attributable to natural selection and recent introgression, although it is not evident if introgression occurs between O. japonica and O. lancea in the examined populations. Our findings of putative F2 hybrids in O. × intermedia support its partial reproducibility, and also suggest that formation of later-generation hybrids generates morphological variation in O. × intermedia. O. lancea plants collected from geographically distant localities were genetically very similar, and it is suggested that O. lancea originated monotopically.


Rheophyte Osmunda Hybrid Expressed sequence tag Simple sequence repeat Cleaved amplified polymorphic sequence Genetic population structure 



We thank S. Akiyama, A. Ebihara, G. Kokubugata, S. Matsumoto and T. Minamitani for providing materials used in this study. We also thank N. Katayama and S. Koi for their collaborative field work and, M. Takamiya, M. Tanaka and S. Kobayashi for information on localities of Osmunda × intermedia and O. lancea. This study was supported by grants-in-aid numbers 1806295 (to Y.Y.) and 20247006 (to M.K.) from the Japan Society for the Promotion of Science.


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Copyright information

© The Botanical Society of Japan and Springer 2009

Authors and Affiliations

  • Yoko Yatabe
    • 1
    Email author
  • Chie Tsutsumi
    • 1
  • Yumiko Hirayama
    • 1
  • Keigo Mori
    • 2
  • Noriaki Murakami
    • 2
  • Masahiro Kato
    • 1
  1. 1.Department of BotanyNational Museum of Nature and ScienceTsukubaJapan
  2. 2.Makino HerbariumTokyo Metropolitan UniversityHachiojiTokyoJapan

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