Electrophoretic evidence for the origin ofDryopteris yakusilvicola (Dryopteridaceae)

  • Dedy Darnaedi
  • Masahiro Kato
  • Kunio Iwatsuki


To investigate the origin of the triploid agamosporous speciesD. yakusilvicola, an electrophoretic analysis was made for five enzymes of theD. sparsa complex.Dryopteris yakusilvicola showed a monomorphic banding pattern for the five enzymes and was heterozygous in all six gene loci coding them. Comparison of enzyme banding patterns suggests that the genome ofD. yakusilvicola was derived through hybridization betweenD. sabaei and either a sexual tetraploid or an agamosporous triploid ofD. sparsa. Cytological evidence (Darnaediet al., 1989) supports the idea that of the two types ofD. sparsa the sexual tetraploid is a parent. The monomorphic pattern implies thatD. yakusilvicola originated from a single hybrid between the parental species, and that it is a neo-endemic of Yakushima Island.

Key words

Agamosporous species Dryopteris yakusilvicola Enzyme electrophoresis Hybrid origin 


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Copyright information

© The Botanical Society of Japan 1990

Authors and Affiliations

  • Dedy Darnaedi
    • 1
  • Masahiro Kato
    • 1
  • Kunio Iwatsuki
    • 1
  1. 1.Botanical Gardens, Faculty of ScienceUniversity of TokyoTokyo

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