イネの穂における出穂遺伝子による着生分布変異の定量化  [in Japanese] Estimation of the Distribution Pattern of Grains and Branches in Rice Panicle  [in Japanese]

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Abstract

イネの出穂期は,品種の地域適応性を決定し,生産性の保障に関わる重要な形質の一つである.近年,出穂期遺伝子が出穂期以外の形態形質に与える多面的効果が明らかにされてきた.本研究では,イネの出穂期遺伝子が穂形態に及ぼす効果を,特に一次枝梗数および二次枝梗数の着生分布に着目して検証した.台湾の日本型イネ品種台中65号(T65)の出穂期遺伝子に関する準同質遺伝子系統を用いて,各系統から得られた穂の一次枝梗数および二次枝梗数,およびこれらに着生した籾数を調査し,着生分布マップを作成した.さらに,一次枝梗の数が異なる系統間で着生分布を比較するため,一次枝梗の着生した二次枝梗数を相対化した.研究の結果,早生対立遺伝子<i>Ef1</i>に,一次枝梗数および二次枝梗数を減少させる効果が認められた.また,晩生対立遺伝子<i>Hd1</i>は一次枝梗に着生する二次枝梗数を減少させる効果が認められた.

Flowering time is one of most important traits to contribute the regional adaptability in rice. Recent molecular genetic studies reveal a lot of genes involved in controlling not only flowering time, but also yield related traits. In this study, We investigated the distribution patterns of the primary rachis-branches and the secondary rachis-branches, by using a Taiwanese rice variety 'Tachung 65' and its near isogenic lines for flowering time gene loci, <i>Hd1</i>, <i>Ehd1</i> and <i>Ghd7</i>. To evaluate the pleiotropic effects on the grain distribution patterns, we applied two methods of two-dimension mapping and graphical evaluation based on the relative branching position of the primary branch. The experimental results showed that <i>Ef1</i> reduced the numbers of the secondary branches, especially at the middle and bottom part of the primary branches in the panicle. <i>Hd1</i> also reduced the numbers of the secondary branches at all parts of the primary branches in the panicle.

Journal

  • Journal of Crop Research

    Journal of Crop Research 60(0), 27-30, 2015

    The Society of Crop Science and Breeding in Kinki, Japan

Codes

  • NII Article ID (NAID)
    110010039505
  • NII NACSIS-CAT ID (NCID)
    AA12344964
  • Text Lang
    JPN
  • ISSN
    1882-885X
  • NDL Article ID
    027714836
  • NDL Call No.
    Z18-705
  • Data Source
    NDL  NII-ELS  J-STAGE 
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