---
kind: "section"
citation: "9 C.F.R. § 101.7"
title: "9"
number: "101.7"
heading: "Seed organisms."
url: "https://uscodex.org/cfr/9/101.7"
---

# §101.7. Seed organisms.


When used in conjunction with or in reference to seed organisms, the following shall mean:

- (a) **Master Seed.** An organism at a specific passage level which has been selected and permanently stored by the producer from which all other seed passages are derived within permitted levels.
- (b) **Working Seed.** An organism at a passage level between Master Seed and Production Seed.
- (c) **Production Seed.** An organism at a specified passage level which is used without further propagation for initiating preparation of a fraction.

## Notes

### Amendments

[49 FR 22625, May 31, 1984]

### Authority

Authority: 21 U.S.C. 151-159; 7 CFR 2.22, 2.80, and 371.4.

### Source

Source: 38 FR 8426, Apr. 2, 1973, unless otherwise noted.

### Amendments

[49 FR 22625, May 31, 1984]