Crop Genebank Knowledge Base

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Terms used on the Crop Genebank Knowledge Base.

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Term Definition
Polymerase Chain Reaction

(PCR) A common molecular technique used to generate numerous copies of specific DNA fragments in vitro.

Polymorphism

The appearance of different forms associated with various alleles of one gene or homologous of one chromosome.

Polyphyletic

A non-monophyletic group where the common ancestor is placed in another taxon said another way a group in which the members do not ultimately derive from one common ancestor where the descendants of one or more other groups are included.

Population

A group of individual plants or animals that share a geographic area or region and have common traits.

Population genetics

The quantitative study and measurement of populations in statistical terms

Pre-breeding/Pre-competitive breeding

The development of germplasm with a genetically broader base for utilization by breeders such as the introduction of exotic germplasm into a cultivar.

Predictive component of taxonomy

The idea that inferences or predictions can be made from taxonomy.

Propagule

Any structure with the capacity to give rise to a new plant whether through sexual or asexual (vegetative) reproduction. This includes seeds spores and any part of the vegetative body capable of independent growth if detached from the parent.

Proximity matrices

A numerical measure of similarity (or dissimilarity) among objects used in multivariate analysis as assessed by various formulas.

Purine

A nitrogen-containing

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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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