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[timelets]

“One could see with his own eyes that this beautiful site was the origin of the cultivated apple.”

Vavilov based these words on his idea that the ‘centres of origin’ of a species lie in the places where you find its highest genetic diversity. His observations that all domestic apples may originate from Almaty has since been confirmed by modern genetics.

http://www.bbc.com/travel/story/20181120-the-birthplace-of-the-modern-apple

Also see
https://timelets.dreamwidth.org/733687.html