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Breeding methods describe the modification of germplasm over cycles of crossing, selection, or propagation. Different crops will have different relevant breeding methods, depending on propagation biology - self-pollinated, open-pollinated, or clonally propagated. Breeding, as described by database breeding methods, creates genetic change and necessitates the assignment of new GIDs to the newly created germplasm.
Generative
Generative methods increase allelic diversity by combining alleles from different progenitors (generally involve multiple GIDs), such as crossing, mutagenesis, and transformation.
Derivative
Derivative methods applied to a source progenitor or population (single GID), decrease or redistribute allelic diversity, such as through inbreeding and self-pollination.
Maintenance
Maintenance methods applied to a source progenitor or population (single GID) maintain a specific level of genetic variation with the goal of creating new instances of germplasm as similar to the progenitor as possible, such as a seed increase.
Pedigrees
Pedigrees in the BMS database are chains of GIDs linked by breeding methods. This database definition of pedigree allows flexibility for missing data and revision. A breeder can revise a breeding method or GID without needing to update naming conventions, pedigree text string, or other genealogical dependencies.
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Germplasm collects a multitude of labels during the development-and-release process (DeLacy et al. 2009).
Preferred Name
Several name types are supported in the BMS, however one must be identified as the Preferred Name for display purposes.
Permanent Unique Identifier (PUI)
Germplasm may also have an optional Permanent Unique Identifier (PUI*) name assigned to it.
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