How is it possible for a grape vine that produced a white grape somehow mutate to produce a red grape? My friend had a vine that produced a small white grape and now 7 years later the same vine is producing a slightly larger red concord grape. I know it's the same vine because there is only one trunk and it is stretched out over a large pergola.
Can a grape vine change?
Nov 12, 2003
5 Replies
Steve,
Could it be that the original white grape was grafted onto a red (Concord) rootstock? if a shoot came up from below the graft, and the upper white stem died back, it would be as you describe.
HTH, mike mtm
Are you POSITIVE it is a concord grape? could it just be a red grape?
Is it possible the grape got cross polinated with a red varity? I don't know enough about grapes Genetics, to know which is the dominant, but if red is dominant, and white reccessive, the cross could very likely come up red.
just a thought....
email: dallyn_spam at yahoo dot com please respond in this NG so others can share your wisdom as well!
Cross pollination cannot affect this years crop, it only affects the seed and therefore the next generation (coming from that seed) so this particular vine will never see a change in fruit color from cross-pollination. The change is most likely from the graft as Mike MTM points out.
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