Karyotype Analysis of Two Species of the Chinese Epiphytic Genus Heteropolygonatum (Convallariaceae-Polygonateae)

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  • YAMASHITA JUN
    Botanical Gardens, Graduate School of Science, Osaka City University
  • TAMURA MINORU N.
    Botanical Gardens, Graduate School of Science, Osaka City University

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  • Heteropolygonatum属(スズラン科アマドコロ連)2種の核型分析

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Abstract

Heteropolygonatum xui and H. ogisui were karyologically investigated for the first time. H. xui was found to be diploid with 2n=32 and H. ogisui was tetraploid with 2n=64, a new count for the genus. At the present stage, all species of the genus except H. ginfushanicum, i.e. H. roseolum, H. pendulum, H. xui and H. ogisui, were karyologically revealed, and all of the four species have the same basic chromosome number of x=16. Accordingly, the genus Heteropolygonatum may be uniform in basic chromosome number. It is also confirmed that the basic chromosome number is one of the characters available for distinguishing Heteropolygonatum from Polygonatum.

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