Seed classes include nucleus, breeder, foundation, registered, and certified seeds. Nucleus seed is obtained from healthy plants in isolation and has the highest genetic purity of around 100%. Breeder seed is produced under supervision from nucleus seed and is used to produce foundation seed, which is genetically 99.9% pure. Foundation seed is the source of registered and certified seeds, and is produced on government farms under research supervision with a white tag. Certified seed is the progeny of foundation, registered, or certified seed itself and is approved and distributed to farmers with an azora blue tag.

1. Welcome

2. Seed
 Classes of seed

3. What is Seed-
 Botanically seed is a fertilized ovule consisting of intact embryo, stored food
and seed coat which is viable and has got the capacity to germinate.
 A seed is an embryonic plant enclosed in a protective outer covering.
 A seed is the part of a seed plant which can grow into a new plant.

4. Classes of seed-
Nucleus seed
Breeder seed
Foundation seed
Registered seed
Certified seed

5. Nucleus seed-
 The nucleus seed is a genetically pure seed without any impurity. They are
obtained from a handful of healthy plants growing in a plot and then grown
strictly in isolation.
 It is produced directly by the originating plant breeder at research institute.
 It has highest genetic purity aprox 100 percent.

6. Breeder seed-
 It is progeny of nucleus seed.
 It is produced under strict supervision of plant breeder at research institute.
 Breeder seed is used for produce foundation seed.
 Genetic and physical purity is almost same to nucleus seed.
 It has golden yellow colored tag.

7. Foundation seed-
 It is progeny of breeder seed.
 Known as mother seed and it is the source of registered and certified seed.
 It is genetically 99.9 percent pure however physical purity of 98 percent.
 It is mainly produced by national seed corporation (NSC).
 It is produced on government farms, at experiment stations, agriculture
universities or on cultivar’s field under strict supervision of research scientists
and export from state seed certification agencies (SSCA)
 White tag is used for foundation seed.

8. Registered seed-
 It is produced from foundation seed and registered seed itself.
 It has satisfactory genetic purity and identity.
 In India it is generally avoided and certified seed is directly produced by the
foundation seed.
 It has purple or orange colored tag on bags.

9. Certified seed-
 It is progeny of either registered seed or foundation seed or certified seed
itself.
 It has satisfactory genetic identity and purity.
 It is approved and certified by the state seed certification agency.
 It is available for general distribution to the farmers for commercial crop
production.
 It has azora blue colored tag on bag.