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.
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.