RFLP analysis of nuclear DNA for study of phylogeny and domestication of tetraploid wheat

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To study the phylogeny and domestication of tetraploid wheat species, variations in nuclear DNA of the cultivated and wild species were investigated by RFLP analy-sis. Twenty-two accessions representing 11 species of cultivated tetraploid wheat (Emmer wheat and Timopheevi wheat), 16 accessions of wild Emmer wheat (<i>Triticum dicoccoides</i> Körn.), 14 accessions of wild Timopheevi wheat (<i>T. araraticum</i> Jakubz.), and an accession of common wheat (<i>T. aestivum</i>) were analyzed, using 29 combinations of two restriction enzymes and 20 probes. Based on this result, the genetic distances (d) between all pairs of accessions were estimated. An average d was 0.0189 in the Emmer group and 0.0024 in the Timopheevi group, while that between the groups was 0.0698. Cluster analysis using UPGMA, NJ (neighbor joining) and maximum parsimony method showed clear differentiation of Emmer wheat and Timopheevi wheat. Among the cultivated Emmer wheat <i>T. dicoccum</i> Schübl. showed the largest nucleotide diversity (π=0.0180) which was close to that (0.0186) in the wild ancestral species, <i>T. dicoccoides</i>. All the cultivated species, except for <i>T. dicoccum</i> and <i>T. paleocolchicum</i> Men., were grouped into a distinct cluster in the phylogenetic trees. All but one accessions of <i>T. dicoccoides</i> were grouped in another. The large genetic diversity in <i>T. dicoccum</i>, the non-free threshing species, supports the archeological evidence that <i>T. dicoccum</i> was the earliest domesticated tetraploid wheat.<br>

収録刊行物

  • Genes & genetic systems

    Genes & genetic systems 72(3), 153-161, 1997-06

    The Genetics Society of Japan

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各種コード

  • NII論文ID(NAID)
    10003761057
  • NII書誌ID(NCID)
    AA11077421
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13417568
  • NDL 記事登録ID
    4326598
  • NDL 雑誌分類
    ZR1(科学技術--生物学)
  • NDL 請求記号
    Z53-W539
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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