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About Releases

indian rice grass photoIndian ricegrass (Achnatherum hymenoides) 6 releases:  Bonneville, Nezpar, Paloma, Rimrock, Star Lake, & White River. 

Click here for a complete list of releases

  

 

 

 

What is a release?  

Release is a generic term used to refer to named plant material that has been intentionally developed for commercial distribution.  Generally, plant material will undergo selection and extensive testing before the being ‘released’ to the public as a proven plant material with known characteristics.  The several types of releases are described below.

 

  Types of Releases

The following types of releases and their definitions are recognized by the Association of Official Seed Certifying Agencies (AOSCA).
Tested, selected, and source-identified releases are also termed "pre-varietal" releases.


Cultivar:
An assemblage of cultivated plants clearly distinguished by characters (morphological, physiological, cytological, chemical,
other) and when reproduced (sexually or asexually) retains these characters. This plant material has been through replicated
testing at multiple sites over two or more generations. This testing proves and documents the heritability of these traits, the
superiority and/or performance, and the range of adaptation.

Tested:
The progeny of plants whose parentage has been tested and has proven genetic superiority or possesses distinctive traits for
which the heritability is stable as defined by the certifying agency; seed or plants must be produced to ensure genetic purity
and identity from either rigidly controlled and isolated natural stands or individual plants, or seed fields or orchards.
Complete area of adaptation and performance may not be known.

Selected:
The progeny of phenotypically selected plants of untested parentage that have promise but not proof of genetic superiority or
distinctive traits, produced to ensure genetic purity and identity from either rigidly controlled and isolated natural stands or
individual plants, or seed fields or orchards. Complete area of adaptation and performance is usually not known. Plants may
not breed true with successive generations, and the desirable characteristics may not show up in all of the offspring.

Source-Identified:
Seeds or plants from a naturally growing population occupying a known or defined geographic area. No selection or testing
of the parent population has been made. There is no performance or adapatation available for the collection. Offspring is
produced to ensure genetic purity and identity from either rigidly defined natural stands, seed production areas, seed fields, or
orchards.


The following types of releases are not recognized by AOSCA but are used by the Plant Materials Program.

Germplasm:
Basic genetic material possessing one or more desirable traits that may be useful in future plant improvement or breeding.
Making the release is in the best interests of U.S. agriculture and the state or agency research program. This type of release is
generally not intended for commercial use.

Informal:
The term "informal" was used to represent pre-varietal releases before AOSCA recognized "tested" and "selected" releases.
Informal releases are equivalent to "tested" and "selected" releases. "Informal" releases also include those materials which did
not go through the official release process, but were still released to the public to address a specific conservation need at the
time.


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