Cytogeography of Artemisia Keiskeana (Asteraceae : Anthemidae)

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著者

    • MASUMORI S.
    • Biological Institute, Faculty of Education, Yamaguchi University
    • KUNIHIRO Y.
    • Biological Institute, Faculty of Education, Yamaguchi University
    • NAKAMURA T.
    • Biological Institute, Faculty of Education, Yamaguchi University
    • HARA M.
    • Biological Institute, Faculty of Education, Yamaguchi University
    • NAKAMOTO M.
    • Biological Institute, Faculty of Education, Yamaguchi University
    • NAKAMA K.
    • Biological Institute, Faculty of Education, Yamaguchi University
    • KANDA Y.
    • Biological Institute, Faculty of Education, Yamaguchi University
    • MATSUE K.
    • Biological Institute, Faculty of Education, Yamaguchi University
    • IZUMI K.
    • Biological Institute, Faculty of Education, Yamaguchi University
    • WATANABE K.
    • Biological Institute, Faculty of Education, Yamaguchi University

抄録

A total of 391 accessions from 11 populations of Japanese Artemisia keiskeana were cytologically examined. Twenty-one percent of these accessions carried B chromosomes in addition to the regular diploid complement and 3.5% were triploids. The frequency of plant with B chromosomes ranged from 0% to 59% among 11 populations. B chromosomes were 1/2-1/5 in length as compared with the smallest autosome and were euchromatic in nature. They were ususally mitotically unstable and varied in number from zero to ten both within and between plants. This variation in number of B chromosomes within a plant may be caused by the non-disjunction and unequall segregation during mitotic anaphase. These B chromosomes seemed not to have any phenotypic consequences on plant. Neverthless B chromosomes have been found in 6 examined populations distantly isolated from each other and have occurred in large proportion of the individuals of three populations around the boundary of Okayama and Hiroshima Prefectures. The non-random spatial distribution of plants with or without B chromosome in these natural populations may, at least in part, be due to asexual reproduction. Triploids were found in 2 populations distantly isolated from each other. They are karyotypi-cally auto-triploids. They have occurred spontaneously and are maintained asexually in natual populations.

収録刊行物

  • Cytologia : international journal of cytology  

    Cytologia : international journal of cytology 60(1), 53-61, 1995-03-25 

    財団法人 日本メンデル協会

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各種コード

  • NII論文ID(NAID)
    10002793660
  • NII書誌ID(NCID)
    AA00622764
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00114545
  • データ提供元
    CJP書誌  J-STAGE 
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