日本の栽培ダイコンにおける自家不和合性遺伝子と自家不和合性程度の遺伝的変異 Genetic variation of the S-alleles and level of self-incompatibility in Japanese cultivated radish(Raphanus sativus L.).

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日本における栽培ダイコンの採種関連形質に関して遺伝的変異を知る目的で, 在来品種を中心に23品種群219系統を用い, 自家不和合性遺伝子S, 自家不和合性程度ならびに一莢粒数を調査した.検定交配ならびにPCR-RFLPによりS対立遺伝子はS^<201>〜S^<237>の37種類が同定された.S対立遺伝子の種類から供試品種群の類別を数量化理論IV類からの主成分分析より試みた結果, 形態形質や古来の地理的分布により従来類別されている品種群との対応は認められず, S遺伝子は日本の栽培ダイコン系統分化に対してほぼ中立であったことが示唆された.自家不和合性程度は, 人工開花自家受粉を行った交配花数あたりの結実莢数, すなわち自殖結実率で評価した.供試系統には0%から100%までの遺伝的変異が認められたが, 品種群間の差は認められなかった.また蕾受粉における一莢粒数では, 0.9〜6.2粒までの遺伝的変異が認められた.なお, これら3形質間には相関関係は認められなかった.以上の結果を基に, ダイコン遺伝資源における採種関連形質評価の重要性と, これら形質の選抜上の留意点について考察した.

It is very important to recognize genetic variations in the seed production characteristics of radish(Raphanus sativus L.), because, based on the land area devoted to cultivation and the number of local varieties, radish is one of the most common Japanese vegetables. We used 219 lines, belonging to 23 varietal groups, of cultivated radishes and examined 3 seed productioncharacteristics : the self-incompatibility alleles(S-alleles), the level of self-incompatibility and the number of seeds per pod in bud pollination. Thirty-seven S-alleles, designated as S^<201> to S^<237>, were identified by cross pollination tests and PCR-RFLP. These varietal groups were classified by principal component analysis, based on the similarity of the S-alleles calculated by quantification method IV. The classification of the varietal groups in these experiments did not correspond to that based on the morphological characteristics or geographical distribution of the local varieties. Thus, the tests revealed that the S-gene is not correlated with the phyletic diversification of Japanese cultivated radishes. The levelof self-incompatibility(SI)was evaluated by the rate of self-seed setting, i.e.the number of pods setting seed/the number of flowers artificially self-pollinated in anthesis × 100(%). The level of SI in these lines ranged from 0 to 100 %. However, there was no correlation within these varietal groups in this caracteristic as well as in the S-alleles. The number of seeds per pod ranged from 0.9 to 6.2 seeds. No correlation among the above characteristics was detected. In conclusion, we considered the importance of seed production characteristics in the evaluation of radish germplasm collection and suggest that the breeders should pay attention to the selection of these characteristics.

収録刊行物

  • 育種学研究

    育種学研究 1(4), 211-220, 1999-12-01

    日本育種学会

参考文献:  26件中 1-26件 を表示

被引用文献:  2件中 1-2件 を表示

各種コード

  • NII論文ID(NAID)
    110001812534
  • NII書誌ID(NCID)
    AA11317194
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    13447629
  • NDL 記事登録ID
    4927744
  • NDL 雑誌分類
    ZR7(科学技術--農林水産--農産)
  • NDL 請求記号
    Z74-B467
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS  IR 
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