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Definitions (136)

1.

3   3

Candidate tree


A tree that has been tentatively selected for inclusion in a breeding program, but has not yet been measured or compared with surrounding trees. (See plus tree and elite tree.)
Source: esf.edu

2.

2   2

Seed zone


An area within which seed can be collected from any natural stand and planted in any new site without fear of mis-adaptation.
Source: esf.edu

3.

2   2

Conelet


An immature cone (strobilus) in the conifers.
Source: esf.edu

4.

1   1

Seedlot


A designation of a group of seeds with some factor in common, i.e., year of collection, stand or seed orchard, individual "+" trees, point of origin in a provenance test, a half- or full-sib family.
Source: esf.edu

5.

1   0

Seed orchard


A seed orchard established from seedlings (as opposed to grafts). Usually seedling seed orchards are established with multiple-tree plots so that selection can take place first among families and then among the individuals within each family plot, reducing each plot to a single tree.
Source: esf.edu

6.

1   0

Seed orchard


A seed orchard established from vegetatively propagated trees, usually grafts. Usually clonal seed orchards are established with single-tree plots with different ramets of each clone located as far apart as possible to reduce self pollination.
Source: esf.edu

7.

1   0

Seed orchard


A plantation established for the production of tree seed.
Source: esf.edu

8.

1   1

Germplasm conservation


, in situ - Maintaining the genetic variability of a population in approximately the same geographic and ecological conditions under which it evolved. (This should always be the first choice.)
Source: esf.edu

9.

1   1

Germplasm conservation


, ex situ - Maintaining the genetic variability of a population in a different environment or geographic location than where it evolved, i.e., plantations of exotic species, breeding orchards, cold storage of seed or pollen. (See gene bank.)
Source: esf.edu

10.

1   1

Germplasm conservation


Maintenance of the genetic variability of a population. (The term is used in preference to oegermplasm preservation” to reflect the ever-changing nature of living populations.)
Source: esf.edu


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