There are 4 categories of FRM according to the Basic Material from which it is collected.
- Source-identified (SI)
Comes from general or specific locations within a single region of provenance or seed zone altitude band in which no specific superior qualities are recognised.
- Selected (SE)
Collected from stands showing superior characteristics, e.g. better form, growth rate and health.
- Qualified (QU)
Derives from the selection of superior individual trees which have not undergone any form of testing.
- Tested (TE)
Derives from the selection of individual trees or stands that have undergone evaluation for genetic quality or have been shown to be superior, in comparison to accepted standards.