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Landrace.wiki

The encyclopedia and open conservation database for landrace cannabis populations, their genetics and the traditional knowledge that sustains them.

Cloud spilling over a forested mountain ridge, with rock outcrops in the foreground
Picture of the day
Cloud passing up and over Bokor mountain, looking towards the Gulf of Thailand.

Accession Map

Filter by collection year, classification, seed lot, sourcing type or provenance evidence, and select a marker for accession details or a diamond for a population. Every figure on this card describes the accessions currently shown. A further 448 documented accessions carry no coordinates yet and cannot be mapped.

Interactive map of documented accessions. It is unavailable here; browse the accession list instead.
Seed lot status
UrgentAt riskSecureHeld in a genebank, not distributedNo data yet, or too little to rateWhat these mean
365of the 876 accessions on this map have a seed lot rated Urgent. See which populations to grow out first
Places
Growing region
Northeastern Thailand
Mekong Basin
Khorat Plateau cultivation zone shaped by Mekong tributaries, monsoonal rice agriculture, and long-standing Lao-Isan cultural continuity
Cardamom Mountains
Southern Cambodia
Chamurchi-Laxmi Duar
The Dooars
Chapramari
The Dooars
Ganja Mahal
Research

Latest publications

Venue: Agriculture and Natural Resources
30 Sep 2026
Compares selfing with intercrossing for producing feminized seed from two Thai landrace accessions of Hang Kra Rok cannabis, one from Bangkok and one from Sakon Nakhon. Female cuttings were treated with colloidal silver to induce male flowers, and the progeny were grown in a plant factory with artificial lighting. Both selfed lines and the Sakon Nakhon by Bangkok cross gave 100% female plants, while the reciprocal cross produced one hermaphrodite (5.6%). Dry inflorescence weight did not differ between treatments, and the Bangkok selfed line had the highest THC content at 6.58%. The plants were grown under artificial light, so the chemistry is not field chemistry.
Map of reported cannabis events. The interactive map is unavailable here; see the current events portal instead.
New here

Start with the record

Learn what an accession is, how to read its fields and maps, and what the status of its seed lot means.

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Field observations, photographs, corrections, sources and translations all strengthen the open record.

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