Sunday, February 12, 2012

What did the first "Seedless" grape vine grow from?

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What did the first "Seedless" grape vine grow from?
seedless grapes are the result of cultivation of naturally occurring seedless plants

The common supermarket green seedless grapes are descended from a European seedless grape strain that probably originated between the Black and Caucasus Seas.

Grape growers spread this variety all over the world, and the same species exists under many different names. It has been grown in the United States since at least 1872 under the name Thompson. Other seedless grape varieties, even red and black varieties, are also descended from the Thompson. The Thompson has a genetic abnormality that causes the seeds to arrest development. Though the flower is pollinated and the ovum fertilized, the seeds stop growing after a few weeks. So, the grape is not entirely seedless; rather, the seeds are aborted, and exist as tiny specks inside the fruit. Commercial growers treat the plants with a growth hormone called gibberillin, which is normally secreted by developing seeds. The flowers are dipped or sprayed with the hormone so that the grapes grow big and juicy despite the arrested seeds.
Reply:Funny choice. He posted after me and took from my link. I did the homework he gets the best answer? Report It
Reply:a lab
Reply:Great question. I have often wondered about that. I will be interested to see a serious answer.
Reply:I once heard how seedless watermelons are produced. It is extremely complicated cross breading. The cells of the seedless watermelons end up having something like three nuclei (rather than the normal one). I know the conundrum you're getting at, but I can assure you it is probably just agricultural trickery.
Reply:The first seedless grape was probably a mutation. After it was discovered, it was probably asexually reproduced from cuttings of the original mutated plant. Grafting and rooting are common ways to grow grapes.



As far as seedless watermelons, they are not truly seedless, the seeds which are in it are small and don't have the usual brown/black seed coat. They are bred that way using cross pollination of specific parent breeds.



Bug Doc
Reply:Seedless oranges and seedless grapes are the result of cultivation of naturally occurring seedless plants. The navel orange is descended from a seedless orange tree found on a plantation in Brazil in the nineteenth century. This tree was a mutation, that is, something in its genetic material had spontaneously changed, resulting in this unique plant. Orange growers propagated new trees from the original navel, so that all the navel oranges available in markets today are descended from that Brazilian tree. The common supermarket green seedless grapes are descended from a European seedless grape strain that probably originated between the Black and Caucasus Seas.


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