Terms used on the Crop Genebank Knowledge Base.
| 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 |
Glossary open source software by M. Brampton