Science Fact Finder | The Plant World - How Did The Navel Orange Originate?

How did the navel orange originate?

Every navel orange is a descendant of one mutant tree that appeared on a plantation in Brazil in the early nineteenth century. A bud from the mutant tree was grafted (implanted) onto another tree; that tree's branches were then grafted onto another, and so forth.

Source: Trefil, James. 1001 Things Everyone Should Know About Science, p. 4.

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