Crop Genebank Knowledge Base

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Terms used on the Crop Genebank Knowledge Base.

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Term Definition

Standard Material Transfer Agreement


Single nucleotide polymorphisms, or SNPs (pronounced "snips")


A non-toxic method of killing weeds and insect pests by covering the ground with layers of clear plastic and allowing the sun to create enough heat.

Sorption isotherm

See isotherm.

Species diversity

A function of the distribution and abundance of species similar in meaning to species richness. In more technical literature includes considerations of the evenness of species abundances. An ecosystem is said to be more diverse according to the more technical definition if species present have equal population sizes and less diverse if many species are rare and some are very common.

Storage life

The number of years that a seed can be stored before seed death occurs.


Refers to two or more populations that occupy overlapping geographic areas.

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Sources for this glossary: IPGRI Tech. Bulletin 10: Molecular markers for genebank management and Seed handling in genebanks training course
Glossary open source software by M. Brampton

International Agricultural Research Centres who worked together to make this site possible:
Africa Rice Center | Bioversity International | CIAT | CIMMYT | CIP | ICARDA | ICRISAT | IFPRI | IITA | ILRI | IRRI |

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