Why Your Supermarket Only Sells Five Kinds of Apples 

Monday, July 29th, 2013

Today’s a good day to learn about apples.

The key thing to understand about apple varieties is that apples do not come true from seed…If that seed grows into a tree, its apples will not resemble its parents’. Often they will be sour little green things, because qualities like bigness, redness, and sweetness require very unusual alignments of genes that may not recur by chance…

If you like the apples made by a particular tree, and you want to make more trees just like it, you have to clone it: Snip off a shoot from the original tree, graft it onto a living rootstock, and let it grow. This is how apple varieties come into existence. Every McIntosh is a graft of the original tree that John McIntosh discovered on his Ontario farm in 1811, or a graft of a graft. Every Granny Smith stems from the chance seedling spotted by Maria Ann Smith in her Australian compost pile in the mid-1800s.

I did not know that.


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