"Sweet Potatoes May Have Originated in Asia" Topic
5 Posts
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| Tango01 | 09 Jun 2018 3:23 p.m. PST |
"57-milion-year-old leaf fossils from eastern India suggest that the worldwide-distributed morning glory family (Convolvulaceae), which includes sweet potatoes and many other plants, originated in the late Paleocene epoch in the East Gondwana land mass that became part of Asia. "I think this will change people's ideas. It will be a data point that is picked up and used in other work where researchers are trying to find the time of the evolution of major groups of flowering plants," said Professor David Dilcher, from the Department of Geology at Indiana University, Bloomington. Previous fossil evidence had suggested the Convolvulaceae family may have originated in North America about 35 million years ago…."
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| jdginaz | 09 Jun 2018 4:35 p.m. PST |
So all they really know is that they found evidence that at least one morning glory grew in eastern India 57 million year ago. It doesn't mean that it wasn't growing elsewhere at the same time. How is that suppose to change things? |
| Cacique Caribe | 10 Jun 2018 12:00 p.m. PST |
"It doesn't mean that it wasn't growing elsewhere at the same time." Spot on! Dan |
| Tango01 | 13 Jun 2018 11:52 a.m. PST |
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| Desert Rat | 13 Jun 2018 3:53 p.m. PST |
It will change the hypotheses on how the Pacific islands were colonised by the Micronesians and Polynesians. They took their domesticated species with them but it was always a mystery as to how they got the sweet potato if it evolved in the Americas. This would entail the Polynesians migrating across the Pacific, picking up the sweet potato, then coming back to the islands with it, then disseminating it out. This hypothesis was a key factor in Thor Heyerdahl's Kon-tiki expedition. It seems they had it all along. |
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