Control of expression patterns of anthocyanin structural genes by two loci in the common morning glory
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概要
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Two loci producing white flowers have been identified in the common morning glory, Ipomoea purpurea. At the W locus, ww individuals produce flowers with white corollas and pigmented rays, while at the A locus, aa individuals produce flowers with white corollas, and a*a* individuals produce variegated corollas. To determine whether these two loci correspond to regulatory or structural genes, six structural genes required for anthocyanin synthesis were cloned and their expression pattern was examined in genotypes with white and pigmented flowers. In ww flower buds, expression of all six structural genes was greatly reduced or eliminated, indicating that the W locus encodes a regulatory gene. By contrast, genotype at the A locus did not affect expression of any of the structural genes, suggesting that the A locus may encode one of those structural genes. An evolutionary comparison of structural gene regulation in maize, snapdragons, petunias, and morning glories suggests that regulatory control of the anthocyanin pathway is evolutionarily labile.
- 日本遺伝学会の論文
著者
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Miller Richard
Department Of Medical Biophysics University Of Toronto
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Rausher Mark
Department Of Zoology Box 90325 Duke University
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TIFFIN Peter
Department of Zoology, Box 90325, Duke University
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Tiffin Peter
Department Of Zoology Box 90325 Duke University
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Miller Richard
Department Of Zoology Box 90325 Duke University
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