Development of transgenic rice (Oryza sativa L.) expressing wheat high- and low-molecular-weight glutenin subunit proteins
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概要
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We isolated transformation-competent artificial chromosome (TAG) clones harboring a high-molecular-weight glutenin subunit (HMW-GS) gene and a low-molecular-weight GS (LMW-GS) gene from wheat genomic DNA, and developed transgenic rice lines with these genes using a transformation system mediated by Agrobacterium tumefaciens. We developed two lines of transgenic rice, one expressing the gene coding for HMW-GS and the other expressing the gene coding for LMW-GS. By crossing these transgenic lines, a novel line harboring both genes was developed and the expression of GS proteins was analyzed. This is the first study indicating that the two kinds of wheat GSs, HMW-GS and LMW-GS, accumulated in rice endosperm. In all the transgenic lines, the introduced GS genes were expressed in the rice endosperm, and the expressed proteins were processed at the same site as the mature GS protein in wheat seeds, forming insoluble polymeric proteins similar to those found in wheat. It was suggested that the protein-processing system was conserved between rice and wheat, and that it was possible to produce wheat gluten using the protein-processing system of rice.
- 日本育種学会の論文
著者
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IKEDA Tatsuya
National Agricultural Research Center for Western Region
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Toyoda Atsushi
Riken Genomic Sciences Center
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Araki Etsuko
National Agricultural Research Center For Western Region
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Toda Tatsushi
Riken Genomic Sciences Center
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Ohgihara Yasunari
Kihara Institute for Biological Research of Yokohama City University
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Yano Hiroshi
National Agricultural Research Center for Western Region
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Ikeda Tatsuya
National Agricultural Res. Center For Western Region National Agriculture And Food Organization
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TOYODA Atsushi
RIKEN Genome Sciences Center
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