Seed is defined as a fertilized mature ovule that contains an embryonic plant, stored food material, and a protective coat. Seed quality refers to seeds that are produced scientifically and contain varietal purity, freedom from weed seeds and other crop seeds, and have high germination and vigor as well as a safe moisture content. High quality seeds are the basic input for crop production as they improve productivity, are carriers of new technology, cut down on seed requirements, and produce high quality crops. There are different classes of quality seeds including nucleus, breeder, foundation, certified, and improved seeds which are defined by their source and intended uses.

1. By
RAVI BANJADE
ROLL NO : 20
INTRODUCTION TO SEED & SEED QUALITY

2. SEED
A true seed may be defined as a fertilized mature
ovule that posses an embryonic plant, stored food
material and a protective coat which is viable and
has got capacity to germinate.

3. SEED QUALITY
• Seed is said to be quality if it is scientifically
produced and contain varietal purity,
• free from weed seeds and other crop seed.
• having high germination and vigor
• safe moisture content.

5. IMPORTANCE OF Q.S.
• basic input in crop production
• high genetic potential
• improve the productivity of crops
• carrier of new technology
• cut down the seed requirement
• High quality produce

6. CLASSES OF QUALITY SEED
1) Nucleus Seed
• Obtained by the breeder through individual plant selection.
• In our country, nucleus seed is synonymous with breeder seed.
2) Breeder Seed
• Breeder seed is the progeny of nucleus seed.
• has golden yellow tag.

7. 3) Foundation seed
• Foundation seed is the progeny of breeder
• relatively less pure compared to breeder's seed
• has white tag.
4) Certified seed (1st generation)
• progeny of foundation seed
• has tag with blue border.
5) Certified seed (2nd generation)
• progeny of certified seed 1st generation.
• has tag with green border.
6. Improved seed
• progeny of certified seed 2nd generation.
• have a wide range of adaptability, tolerance to adverse
environmental conditions such as drought, flood and frost.
• available in sufficient quantity.
• has yellow tag and is used for commercial cultivation of crop