New Research Reveals Hidden Diversity in Peruvian Cacao

For centuries, farmers across Peru have cultivated an extraordinary diversity of cacao.

Many of these trees have been selected, propagated and cared for over generations because they consistently produced good harvests, distinctive flavours or simply thrived in their local environment.

Now, modern genetic research is revealing something remarkable.

A team of researchers has identified four previously unrecognised genetic lineages within these traditional cacao populations, expanding our understanding of one of the world's richest centres of cacao diversity.

The discovery doesn't change the trees.

It changes how we understand them.

Why Peru?

Peru is already one of the world's great cacao countries.

It is the world's eighth-largest cocoa producer and home to more than 80,000 cacao farming families, most of whom cultivate relatively small farms. Unlike many regions where modern breeding has produced increasingly uniform planting material, much of Peru's cacao still descends from wild and semi-wild populations that have evolved over centuries in different valleys and forests.

That makes Peru something of a living archive.

Its remarkable geography, stretching from the Amazon Basin into the foothills of the Andes, has allowed cacao populations to develop in relative isolation. Over time, different regions have produced trees with their own genetic identities, shaped by local landscapes, climates and natural selection.

For researchers trying to understand cacao's evolutionary history, there are few better places to look.

Looking Beyond Appearance

For decades, scientists grouped the world's cacao into ten major genetic lineages.

That framework has been enormously useful, helping researchers understand where different populations originated and how they are related.

But science is always evolving.

By analysing the DNA of 390 traditional cacao trees collected from farms across Peru, researchers found that several populations simply didn't fit within the existing picture. Instead, they formed four distinct genetic groups that had not previously been recognised.

The newly identified lineages have been named:

• Chuncho 1

• Chuncho 2

• Awajún

• Porcelana

Each represents another branch of cacao's growing family tree.

More Than New Names

Discovering new genetic lineages isn't about creating more complicated classifications.

Each lineage represents a unique collection of traits that may prove valuable in the years ahead.

Researchers are interested in characteristics such as disease resistance, tolerance to drought or heat, productivity and, perhaps most excitingly for chocolate makers, flavour.

Two of the newly identified groups—Awajún and Porcelana—share ancestry with the famous Nacional lineage, long associated with some of the world's finest and most aromatic chocolates. That doesn't guarantee exceptional flavour, but it makes these populations particularly interesting for future research and breeding programmes.

[Looking for the bigger picture? Read our companion article: Four New Cacao Varieties Have Been Discovered in Peru. Here's Why That Matters, where we explore why genetic diversity is so important for the future of chocolate.]

Why This Matters Beyond Peru

This discovery comes at an important moment for the chocolate industry.

Around the world, cacao is facing increasing pressure from disease, changing weather patterns and rising temperatures. At the same time, demand for chocolate continues to grow.

For years, much of the conversation has focused on increasing production.

This research suggests another part of the solution may already exist.

Rather than creating entirely new trees, scientists are finding valuable genetic resources in traditional farming communities where diverse cacao populations have been quietly preserved for generations. The future resilience of cacao may depend as much on protecting this diversity as on developing new technologies.

Farmers Have Been Preserving This Diversity All Along

Perhaps the most encouraging aspect of the study is that it highlights the role of farmers themselves.

These newly recognised lineages survived because generations of growers continued planting, observing and caring for them. Long before DNA sequencing, farmers were selecting trees that thrived in their local conditions or consistently produced good cacao.

Science is now giving names to relationships that farming communities have been living with for generations.

A Bigger Family Tree

One of the most exciting outcomes of this research is that it reminds us our understanding of cacao is still evolving.

Every new lineage broadens our picture of where cacao came from, how it adapted to different environments and what possibilities it may hold for the future.

For chocolate lovers, that means the story of cacao is far from complete.

There are still forests to explore, farms to learn from and trees whose histories have yet to be fully understood.

And perhaps that's the most remarkable discovery of all: after thousands of years of cultivation, cacao still has new stories to tell.

Further Reading

If you'd like to explore the research behind this article:

• Motilal, L. A., et al. (2026). Genetic structure of traditional cacao reveals four new genetic lineages in indigenous Amazonian sites in Peru.PLOS ONE, 21(7), e0351690. https://doi.org/10.1371/journal.pone.0351690

• PLOS ONE / EurekAlert. (2026). Researchers identify four new genetic lineages of traditional Peruvian cacao.https://www.eurekalert.org/news-releases/1133998

• FoodNavigator. (2026). New Peruvian cacao varieties discovered to save chocolate? (Industry news summary.)