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| 著者 | Gu,X.Y., Foley,M.E., Horvath,D.P., Anderson,J.V., Feng,J., Zhang,L., Mowry,C.R., Ye,H., Suttle,J.C., Kadowaki,K.I. and Chen,Z. | |
| タイトル | Association Between Seed Dormancy and Pericarp Color Is Controlled by a Pleiotropic Gene That Regulates Abscisic Acid and Flavonoid Synthesis in Weedy Red Rice | |
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Abstract: Seed dormancy has been associated with red grain color in cereal crops for a century. The association was linked to qSD7-1/qPC7, a cluster of quantitative trait loci for seed dormancy/pericarp color in weedy red rice. This research delimited qSD7-1/qPC7 to the Os07g11020 or Rc locus encoding a basic helix-loop-helix family transcription factor by intragenic recombinants and provided unambiguous evidence that the association arises from pleiotropy. The pleiotropic gene expressed in early developing seeds promoted expression of key genes for biosynthesis of abscisic acid (ABA), resulting in an increase in accumulation of the dormancy-inducing hormone; activated a conserved network of eight genes for flavonoid biosynthesis to produce the pigments in the lower epidermal cells of the pericarp tissue; and enhanced seed weight. Thus, the pleiotropic locus most likely controls the dormancy and pigment traits by regulating ABA and flavonoid biosynthetic pathways, respectively. The dormancy effect could be eliminated by a heat treatment, but could not be completely overcome by gibberellic acid or physical removal of the seed maternal tissues. The dormancy-enhancing alleles differentiated into two groups basically associated with tropical and temperate ecotypes of weedy rice. Of the pleiotropic effects, seed dormancy could contribute most to the weed adaptation. Pleiotropy prevents the use of the dormancy gene to improve resistance of white pericarp cultivars against pre-harvest sprouting through conventional breeding approaches. |
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| 掲載誌 | Genetics | |
| Country | ||
| 刊数 | 189(4) | |
| ページ | 1515-1524 | |
| 発刊年 | 2011 | |
| PubMed ID | 21954164 | |
| PubMed Central ID | - | |
| DOI | 10.1534/genetics.111.131169 | |
| URL | - | |
| 関連情報 | ||
| 遺伝子 | RC | |
| INSD | JF303048 JF303049 JF303050 JF303051 JF303052 JF303053 JF303054 JF303055 JF303056 JF303057 JF303058 JF303059 JF303060 JF303061 JF303062 | |
| 系統 |
野生イネ コアコレクション |
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| 突然変異系統(遺伝研 Collection) | - | |
| 種子不稔系統 | - | |
| 致死変異体系統 | - | |
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組織別発生段階 - 突然変異系統(遺伝子) |
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| 栽培イネ品種(遺伝研 Collection) | - | |
| 組織別発生段階 | - | |
