|Keys to Color and Variations in the Gene|
Color is a vitally important quality trait of table, juice, and wine grapes that has been linked to health promoting antioxidant content. The genetics behind this trait is something that until recently has been poorly understood. Working with a geneticist of INRA (Institut National de la Recherche Agronomique) in Montpellier, France, GGRU geneticists expanded on independent 2004 research in Japan that identified a genetic mutation known as Gret1 as responsible for white-skinned grapes.
That study showed that Gret1's interaction with VvmybA1, a gene found in all V.vinifera grapes, was key to white fruit color. Gret1 is a transposable element, also known as a 'jumping gene' because it is a member of a class of
In addition to verifying those findings, the
This finding may help improve efficiency in breeding new grape cultivars for specific colors, as well as the intensity and color stability of juices and wines. It may also lead to better understanding of how environment and management practices affect grape color and quality, and of the relationships between fruit color and healthy compounds.