The Strange World of Apples 🍎
Most people assume that if you plant the seeds from an apple, you’ll grow a tree that produces the same apples. But that’s not how cultivated apples work!
The genetic lottery
Apples don’t grow true to type from seed. If you plant the seeds from a Granny Smith, Gala or Jazz apple, the resulting tree will produce genetically unique apples. That’s because apple trees cross-pollinate, and their offspring inherit a new combination of genes from two parent trees.
Each seed is essentially a genetic lottery ticket. You could plant thousands of seeds from your favourite apple and not get the exact same variety. Finding a new apple with all the desirable characteristics of an existing commercial variety is incredibly unlikely. The often-repeated figure of 1 in 10,000 is an illustration of how difficult it can be to find a commercially desirable seedling, not a fixed scientific probability.
So how do we get identical apples?
Through cloning! Not laboratory cloning, but grafting.
Growers take a small branch or bud from an existing tree and graft it onto another apple tree’s rootstock. The new branches are genetically identical to the original fruit-producing tree and produce the same variety.
That’s why Granny Smith apples around the world are descendants of the original tree discovered by Maria Ann Smith in Australia in the 1860s. The original tree is long gone, but its genetic lineage lives on through grafting.
But what about wild apples?
Wild apple species also reproduce sexually through seeds, so their offspring aren’t necessarily identical either. However, wild apple populations maintain a naturally occurring diversity of trees and fruit. They aren’t usually cultivated to preserve one specific, commercially desirable apple. Some wild apple species can also reproduce vegetatively, producing genetically similar offspring.
And then there’s the exclusive apple club!
Some modern apples operate under what’s known as a club variety system.
Take the Jazz apple. It was deliberately bred in New Zealand by crossing Braeburn and Royal Gala. Breeders grew the resulting seedlings, selected one with the right characteristics and named its variety Scifresh.
But here’s the catch: you can’t simply decide to grow and commercially sell Jazz apples. They’re protected by a licensing system. Approved growers are allowed to produce them under strict quality and marketing conditions.
Other examples include Pink Lady, Envy and Kanzi.
So essentially, someone can plant an apple seed and potentially discover an entirely new variety, but they can’t just plant a Jazz pip and expect to grow Jazz apples.
The irony? Every time you eat an apple, you’re eating the result of centuries of genetic experimentation, selective breeding and a little bit of luck. And the apple you love might be a clone of one particularly lucky tree that someone discovered generations ago!