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Karyomorphology of some Moraceae and Cecropiaceae (Urticales)

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Abstract

The karyomorphology of 16 species in 13 genera representing Moraceae and Cecropiaceae was investigated in an effort to contribute to a better understanding of chromosome features and evolution in the families. All genera investigated have similar karyomorphology, but differences are found in (1) chromosome features of Interphase nucleus (simple, simple-complex, or complex chromocenter type), (2) basic chromosome number (x=13 or 14), (3) size variation (mono-or bimodial), and (4) frequencies of chromosomes with median centromeres (m-chromosome) (25–85%) and those with subterminal (or terminal) centromeres (st-chromosome) (14–69%). Comparisons with Ulmaceae as an outgroup of the remainder of Urticales suggest that the simple chromocenter type,x=14 comprising bothm- andst-chromosomes, and the monomodial karyotype are plesiomorphies in Moraceae and Cecropiaceae. Most of Moraceae and Cecropiaceae retain generalized chromosome features of the order, but have involved a few evolutionary changes in karyomorphology. Based on some detailed karyomorphological data, inter- and infrafamilial relationships are also briefly discussed.

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Authors and Affiliations

  1. College of Child Development, Kochi Women's University, 132 Ohara-cho, 780, Kochi, Japan

    Kazuo Oginuma

  2. Faculty of Integrated Human Studies, Kyoto University, 606-01, Kyoto, Japan

    Hiroshi Tobe

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  1. Kazuo Oginuma
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  2. Hiroshi Tobe
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Oginuma, K., Tobe, H. Karyomorphology of some Moraceae and Cecropiaceae (Urticales). J. Plant Res. 108, 313–326 (1995). https://doi.org/10.1007/BF02344357

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  • DOI: https://doi.org/10.1007/BF02344357

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