Meet Germicopa: The French Breeder Behind Charlotte and Nine Other Varieties You've Probably Eaten

If you've ever eaten a French-style waxy salad potato — the kind with smooth yellow skin that holds its shape in a niçoise salad instead of falling apart — there's a good chance you were eating a variety descended from one company's breeding program. Germicopa, a French potato breeder based in Châteauneuf-du-Faou, Brittany, created Charlotte: the variety credited as the first firm-flesh potato ever released on the French market, and still the reference point for the entire category decades later.

Germicopa's origin story goes back to 1947, when the Clause selection company partnered with Breton cooperatives to start breeding potato varieties suited to local growing conditions in Brittany. That regional focus never disappeared — the company's research station is still in Châteauneuf-du-Faou today — but the reach has grown considerably. Germicopa now supplies seed to more than 70 countries. Since 2014, it has been part of the Florimond Desprez Group, which gave it access to more advanced breeding technologies without relocating the breeding work itself.

Charlotte is Germicopa's flagship, and for good reason. Germicopa's own materials describe it as the first firm-flesh potato variety ever released on the French market — before Charlotte, that texture profile essentially didn't exist as a commercial category in France. It's a medium-early variety with deep yellow skin, yellow flesh, and a long-oval shape with very shallow eyes and good shape uniformity. Cooking type A means it holds together well, which is exactly what made it the salad standard it remains today — though Germicopa also notes it fries well, with very good frying color at harvest. Dry matter runs fairly high (20-22%), and it carries very high resistance to internal rust spot and to desprouting, plus strong resistance to tuber late blight and PVYntn. Its one real weak spot is foliage late blight resistance, rated fairly low.

Charlotte isn't Germicopa's only fresh-market variety. Amandine, registered in 1994 after a 10-year selection process at the same Brittany station, is marketed under the trademark PRINCESSE AMANDINE — Germicopa positions it as "the reference potato variety in its segment in the high quality French market," described as light and melt-in-the-mouth. Cherie takes the firm-flesh formula and adds red skin over pale yellow flesh, with a very early maturity and what Germicopa calls one of its strongest assets: storage quality that's rated high across the board. Samba and Topaze round out the table segment with a different cooking profile — cooking type A-B and B-C respectively, meaning they lean toward the tender, baking-friendly end rather than pure salad firmness. Topaze is the newest of the group, released in 2020 after Germicopa's standard roughly 10-year breeding cycle, and is already showing very high yield "in many different countries and conditions." Stemster, marketed under the garden-market brand name Prospère, is the most multi-purpose of the lineup — Germicopa lists it as suitable for fries, gratins, mash, soups, and baking, with 6-8 months of storage life.

Germicopa doesn't only breed for the fresh produce aisle. Germi 300 is explicitly described in its own datasheet as "the industrial variety for French fries processing," with fairly high dry matter (21-23%), very long dormancy, and — notably — frying color that stays very good even after 9 months of storage, which matters enormously to a processor trying to run a fry line year-round on one harvest. Daisy serves a similar industrial fry role with higher dry matter still (22-24%) and a yield profile skewed toward large tubers exceeding 50mm, the size processors want for full-length fry strips. Both varieties are rated for full or high resistance to potato cyst nematode and to wart disease, which matters for growers working land with a history of either pressure.

The outlier in Germicopa's lineup is Amyla, which isn't bred for eating at all — it's a starch variety, and its numbers reflect that single-mindedly. Dry matter is rated exceptional at over 26%, well above anything in the table or fry lineup, which is exactly what a starch processor is paying for. It's also rated for very high yield and, like the fry varieties, carries full resistance to wart disease and potato cyst nematode. Amyla is bred specifically to perform under high water-stress conditions on light, well-draining soils — agronomic traits that matter more to a starch grower's bottom line than skin color or presentation ever would.

What's notable about Germicopa's portfolio, taken as a whole, isn't any single variety — it's the spread. The same Brittany research station that produced Charlotte, a potato bred to look good in a supermarket salad aisle, also produced Amyla, a potato nobody outside a starch plant will ever knowingly eat. Ten varieties, three distinct industries, one company, and a breeding program that's been running continuously out of the same corner of France since 1947.