Using a slew of molecular techniques, the team identified the color - stealing culprit in white grapes as a mobile fragment of DNA, called a retrotransposon, which inserts itself into the gene
controlling pigment production.
Previously, Shozo Kobayashi of the National Institute of Fruit Tree Science in Tsukuba, Japan, identified a specific gene that
controls the
production of this
pigment in black - skinned grapes.