Chromosome evolution among seven Fagopyrum species revealed by fluorescence in situ hybridization (FISH) probed with rDNAs

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We determined the numbers and locations of 5S and 45S ribosomal RNA genes (rDNAs) in seven Fagopyrum species, three major and four wild buckwheat species, using fluorescent in situ hybridization (FISH). Although the chromosome numbers between diploid Fagopyrum species were conserved, there was variation in both number and location of rDNA loci. Common buckwheat, F. esculentum, contained three 5S and three 45S rDNA loci allowing us to identify five out of eight pairs of the chromosomes by the rDNA pattern. In addition, F. tataricum and F. cymosum carried one 5S and two 45S rDNA loci, which allowed us to identify three out of eight pairs of the chromosomes in the two species. The rDNA loci of four wild buckwheat species, F. urophyllum, F. pleioramosum, F. callianthum and F. leptopodum showed diversified location. The distribution of the rDNA loci implies a chromosome evolution in Fagopyrum via larger structural rearrangements such as inversions and translocations. The numbers and the locations of rDNAs support the phylogenetic relationships of buckwheat based on the data of internal transcribed spacer (ITS) region of rDNA.

収録刊行物

  • Chromosome science

    Chromosome science 11(1), 37-43, 2008-01-01

    Society of Chromosome Research

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各種コード

  • NII論文ID(NAID)
    110007339276
  • NII書誌ID(NCID)
    AA11163057
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13441051
  • NDL 記事登録ID
    10318897
  • NDL 雑誌分類
    ZR1(科学技術--生物学)
  • NDL 請求記号
    Z54-J215
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS  NDL-Digital 
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