Overview
Sounigo et al. present results from the ClimaLOCA research project (Climate-adapted Low-Cadmium Cacao), a multi-country initiative in Colombia, Ecuador, and Peru aimed at identifying and deploying cacao genotypes with naturally low cadmium accumulation in beans. The project combines germplasm screening, participatory breeding, soil amendment trials, and farmer training to develop an integrated agronomic approach to reducing Cd in commercially produced cacao beans from the highest-risk origin zones in Latin America. The proceedings paper reports on germplasm screening results across multiple CCN-51 and fine-flavor cacao populations, identifying accessions with significantly lower bean Cd than commercial varieties currently grown in high-Cd zones.
Key numbers
- Multi-country study: Colombia, Ecuador, Peru
- Germplasm screening: large panels of cacao accessions evaluated for bean Cd
- Bean Cd range in commercial CCN-51 from high-altitude Ecuador: commonly 1.5–4.0 mg/kg dry weight
- Low-Cd accessions identified: some accessions consistently below 0.5 mg/kg even in high-Cd soils
- Soil amendment trials (lime, organic matter): reduced bean Cd by 20–40% in some trials
- Specific n values per trial not extracted from proceedings; further detail requires full text
Methods (brief)
Multi-site germplasm trial across Colombia, Ecuador, Peru; ICP-MS or ICP-OES for bean Cd (method not specified in available text); farmer participatory approach; soil amendments tested alongside varietal selection; CATIE conference proceedings (B-tier).
Implications
Certification: ClimaLOCA identifies a pathway toward sourcing low-Cd cacao from Ecuador and Peru without simply avoiding those origins — varietal selection plus soil management can achieve meaningful Cd reduction. HMT&C sourcing criteria could incorporate varietal provenance in future. Courses: Illustrates that Cd in cacao is not destiny — it is a function of genotype × environment interaction and is partially manageable through agronomic intervention. App: Low-Cd accessions from high-altitude Ecuador challenge the simple origin-flag logic; the ingredient-level Cd estimate needs a genotype/sourcing-practice modifier for cocoa.
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The five most recent substantive edits to this page, classified major (evidence or structure moved), correction (a published value or statement was wrong and has been fixed), or minor (narrative rewritten without changing the underlying evidence). Each description is derived from what the edit did to this page; the linked commit is the authoritative record, routine regeneration passes are excluded, and the full version history lives in git. When DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.
| Commit | Date | Change | Description |
|---|---|---|---|
| a8052bb | 2026-08-09 | major | 6 sections added; narrative text revised |