The Genetic Basis of a Flower Color Polymorphism in the Common Morning Glory (Ipomoea purpurea)

The Genetic Basis of a Flower Color Polymorphism in the Common Morning Glory (Ipomoea purpurea) The common morning glory (Ipomoea purpurea) is highly polymorphic for flower color. Part of this phenotypic variation is due to allelic variation at the P locus. This locus determines whether flowers will be purple or pink, where purple is dominant to pink. We have determined that the anthocyanin biosynthetic gene flavonoid 3′-hydroxylase (f3′h) corresponds to the P locus. In the pink allele of f3′h there is a large insertion in the third exon, which results in the production of a truncated transcript. This shortened transcript produces a nonfunctional F3′H enzyme, resulting in the production of pink flowers rather than purple. In addition, we describe a polymerase chain reaction (PCR)-based assay that can be used to determine the genotype of a plant at this locus. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Heredity Oxford University Press

The Genetic Basis of a Flower Color Polymorphism in the Common Morning Glory (Ipomoea purpurea)

Journal of Heredity, Volume 94 (6) – Nov 1, 2003

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Publisher
Oxford University Press
Copyright
© 2003 The American Genetic Association
ISSN
0022-1503
eISSN
1465-7333
D.O.I.
10.1093/jhered/esg098
Publisher site
See Article on Publisher Site

Abstract

The common morning glory (Ipomoea purpurea) is highly polymorphic for flower color. Part of this phenotypic variation is due to allelic variation at the P locus. This locus determines whether flowers will be purple or pink, where purple is dominant to pink. We have determined that the anthocyanin biosynthetic gene flavonoid 3′-hydroxylase (f3′h) corresponds to the P locus. In the pink allele of f3′h there is a large insertion in the third exon, which results in the production of a truncated transcript. This shortened transcript produces a nonfunctional F3′H enzyme, resulting in the production of pink flowers rather than purple. In addition, we describe a polymerase chain reaction (PCR)-based assay that can be used to determine the genotype of a plant at this locus.

Journal

Journal of HeredityOxford University Press

Published: Nov 1, 2003

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