Intergenomic translocations of polyploid oats (genus Avena) revealed by genomic in situ hybridization

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Wild and cultivated hexaploid oats share the same genomes (AACCDD) and display a considerable level of interspecific variation in both plant and chromosome morphology. The GISH was utilized to detect the interspecific genomic compositions in four hexaploid and two tetraploid oats using total genomic DNA of <i>Avena eriantha</i> (a C-genome diploid) as probe. Intergenomic translocations between A/D and C-genome chromosomes were frequently observed in hexaploid and tetraploid species. In the hexaploid, two pairs of A/D genome segments on C-genome chromosome (A/D-C) translocation and four to six pairs of C-genome segments on A/D genome chromosome (C-A/D) translocation were clearly identified whilst the number of A/D-C translocations was constant among species. In the tetraploid <i>A. maroccana</i> (AACC), a pair of A-C and four pairs of C-A translocations were observed. Moreover, the A/D translocation segments on chromosome 5C was detected only in <i>A. byzantina</i> and <i>A. maroccana</i>, whilst A/D-C translocations were observed on the 1C and 7C of <i>A. sativa</i>, <i>A. fatua</i> and <i>A. sterilis</i>. <i>A. byzantina</i> did however also carry the 1C rearrangement. This result shows that <i>A. byzantina</i> has retained a similar genomic constitution to the tetraploid ancestor of hexaploid oats, <i>A. maroccana</i>. Three pairs of A-C translocations were detected only in <i>A. murphyi</i> (AACC), and two pairs of those were the 1C and 7C as well as the three hexaploid species except <i>A. byzantina</i>.<br>

収録刊行物

  • Genes & genetic systems  

    Genes & genetic systems 75(3), 167-171, 2000 

    The Genetics Society of Japan

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各種コード

  • NII論文ID(NAID)
    10004957530
  • 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
    5475584
  • 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  CJP引用  NDL  J-STAGE 
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