The genetic basis of a flower color polymorphism in the common morning glory (Ipomoea purpurea).

Journal Article (Journal Article)

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.

Full Text

Duke Authors

Cited Authors

  • Zufall, RA; Rausher, MD

Published Date

  • November 2003

Published In

Volume / Issue

  • 94 / 6

Start / End Page

  • 442 - 448

PubMed ID

  • 14691310

Electronic International Standard Serial Number (EISSN)

  • 1465-7333

International Standard Serial Number (ISSN)

  • 0022-1503

Digital Object Identifier (DOI)

  • 10.1093/jhered/esg098


  • eng