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Are thornless blackberries genetically modified?
The short answer is no — thornless blackberries are not genetically modified in the way most people mean when they hear the term GMO.
Instead, thornless blackberries are the result of traditional plant breeding, careful selection, and sometimes natural mutations that growers have cultivated over many decades.
If you’ve ever scratched your arms up picking wild blackberries and wondered whether those smooth, easy-to-pick thornless blackberries came from a lab, you’re not alone.
It’s a common question, and the answer might surprise you in the best way.
In this post, we’ll dig into whether thornless blackberries are genetically modified, how they actually came to be, and why the distinction matters for gardeners and fruit lovers alike.
Let’s get into it.
Why Thornless Blackberries Are Not Genetically Modified
Thornless blackberries are not genetically modified, and here’s why that’s true:
1. They Come From Traditional Crossbreeding
The thornless blackberries you find at the grocery store or in your garden catalog were developed through old-fashioned crossbreeding.
Plant breeders took blackberry varieties that had fewer thorns and crossed them with varieties that produced great fruit.
Then they selected the offspring that had the best combination of traits — fewer thorns, sweeter berries, stronger plants.
This is the same basic method farmers have used for centuries to improve crops, and it doesn’t involve any lab-based gene editing.
2. Natural Mutations Played a Big Role
Many thornless blackberry varieties trace back to a naturally occurring mutation.
Every now and then, a blackberry plant grows without thorns because of a spontaneous genetic change in its DNA.
Growers noticed these rare thornless canes, propagated them, and used them to breed new thornless blackberries.
So the thornless trait was already present in nature — humans just encouraged it.
3. No Foreign DNA Was Inserted
The key difference between thornless blackberries and true GMOs is that no foreign DNA was inserted into the plant.
GMO crops, like some corn and soybeans, have genes from bacteria or other species spliced into their genetic code in a lab.
Thornless blackberries have none of that.
Their genetics are still 100% blackberry, just with a naturally selected trait for smooth canes instead of prickly ones.
How Thornless Blackberries Were Actually Developed
Understanding how thornless blackberries came to be helps clear up the confusion about whether they’re genetically modified.
1. Early Breeding Programs
Starting in the late 1800s and early 1900s, agricultural researchers began seriously breeding blackberries.
They wanted bigger fruit, better flavor, and easier harvesting.
Thornlessness became a major goal because picking thorny blackberries was slow, painful work.
By crossing thorny varieties with rare thornless mutants, breeders slowly built up a library of thornless blackberry plants.
2. The Role of Universities and Extension Programs
Land-grant universities like the University of Arkansas and Oregon State University played huge roles in developing thornless blackberries.
Their breeding programs spanned decades, and they released popular varieties like ‘Navaho,’ ‘Apache,’ and ‘Chester.’
All of these were created through hand-pollination, seed planting, and careful selection — not genetic engineering.
3. Tissue Culture and Cloning, Not Gene Editing
Once a good thornless blackberry plant is found, growers often propagate it using tissue culture or cuttings.
That means they clone the plant to make exact copies.
Cloning is not the same as genetic modification.
It’s just a way to mass-produce a plant that already has the traits you want.
4. Modern Varieties Stay True to Traditional Methods
Even today, new thornless blackberry varieties are still developed through crossbreeding.
Breeders might use molecular markers to speed up selection, but they aren’t inserting foreign genes.
So when you buy a thornless blackberry plant, you’re getting the result of classic plant breeding, not a GMO.
Are Thornless Blackberries Considered GMOs by Definition?
By the strict definition used in most countries, thornless blackberries are not GMOs.
1. What “GMO” Actually Means
A GMO, or genetically modified organism, is a plant, animal, or microbe whose DNA has been altered using genetic engineering techniques.
That usually means taking a gene from one species and inserting it into another.
Thornless blackberries don’t fit that definition.
2. Regulatory Views on Thornless Blackberries
In the United States, the USDA and FDA don’t regulate thornless blackberries as GMOs.
The same goes for Europe and most other regions.
They’re treated as conventionally bred crops.
That’s because no artificial gene transfer was involved in their creation.
3. Why the Confusion Exists
The confusion probably comes from the word “modified.”
Technically, all domesticated plants are genetically modified in the sense that humans have changed them over time.
But when people ask if thornless blackberries are genetically modified, they usually mean lab-based genetic engineering.
And the answer to that is no.
So, Are Thornless Blackberries Genetically Modified?
Thornless blackberries are not genetically modified in the GMO sense of the term.
They’re the product of traditional crossbreeding, natural mutations, and decades of careful selection by plant breeders.
No foreign genes were inserted, and no lab-based genetic engineering was involved.
So if you’ve been avoiding thornless blackberries because you thought they were GMOs, you can relax and enjoy them.
They’re just blackberries that nature made a little friendlier to pick.