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“ Seed Quality and Characters of good quality Seeds ”
Department of AgricultureBotany
• The control, of seed with required genetic and physical purity that is accompanied
with physiological safety and health status.
• Seed of notified varieties are multiplied in four tier system by the involvement of
ICAR Institutes
State Agricultural Universities
State / National Seed
Corporation
Seed Certification Agencies.
What is Seed Quality ?
• Seed quality characters: A good seed should have the following quality
characters.
Characters of Improved
seeds
Characters of Superior
seeds
1. Higher Yield
2. Better Quality
3. Better agro.
Practice.
4. Responsiveness
5. Wide Adaptability
6. Resistance to
adverse condition
Improved variety of seed
which perform better
than existing varieties.
Improved variety
character perform better
than existing varieties.
1. Physical Purity
2. Optimum moisture
3. Genetic Purity
4. Seed viability
5. Seed uniformity
6. Seed Health
• What are the Characters of good quality Seeds ?
1. Improved variety: Yield is above by 20-25% than the existing variety and some
desirable attributes like disease resistance, drought resistance, salt tolerance etc.,
with good yield potential.
2. Genetic Purity: a) True type.
b) It has direct effect on the yields.
3. Physical Purity: A seed lot is composed of pure seed, inert mater, broken seeds,
undersized seeds, soil and dust particles weed seeds, etc.
• Pure seed together with germination gives the planting value of the seed lot.
4. Seed germination and vigour:
1. Seed germination means ability of a seed when planted under normal sowing
conditions to give rise to a normal seedling.
2. Seed vigour refers to the sum total of all seed attributes that give effective
plant stand in the field.
3. Higher germination percentage and vigour gives adequate plant population and
uniform growth, which have profound effect on, yield and determine the
planting value of the seed.
5. Freedom from weeds and other crop seeds:
• The certain weed species, which are very harmful to the crop and once established
they are difficult to eradicate.
• An absolute freedom from seed of such species is highly desirable and is one of the
important criteria for determining the planning quality of seeds.
6. Seed health: refers to the presence or absence of disease
organisms or insect pests on the seed. The quality of a seed lot depends on its health,
hence the seed should be free from seed borne disease and insect pests.
7. Seed moisture: determining the seed germination and viability during storage.
At high seed moisture content there is high incidence of pest attack and at moisture
content above 16% seed get heated and the viability is lost. Hence the seed should be
stored at safe moisture levels of 11-13%.
8. Seed size, weight and specific gravity: found to have positive correlation with seed
germination and vigour in many crops.
Therefore the seed should be bold with high specific gravity.
9. Seed Colour:
1. reflects the condition during seed maturation.
2. The farmers from ancient times have regarded good normal shine as invariable
quality guides.
3. The colour and shine deteriorates only when the weather conditions are adverse
during maturation or when insects infest the crop or when it is handled badly.

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Seed Quality and Characters of good quality Seeds.pptx

  • 1. Topic on “ Seed Quality and Characters of good quality Seeds ” Department of AgricultureBotany
  • 2. • The control, of seed with required genetic and physical purity that is accompanied with physiological safety and health status. • Seed of notified varieties are multiplied in four tier system by the involvement of ICAR Institutes State Agricultural Universities State / National Seed Corporation Seed Certification Agencies. What is Seed Quality ?
  • 3. • Seed quality characters: A good seed should have the following quality characters. Characters of Improved seeds Characters of Superior seeds 1. Higher Yield 2. Better Quality 3. Better agro. Practice. 4. Responsiveness 5. Wide Adaptability 6. Resistance to adverse condition Improved variety of seed which perform better than existing varieties. Improved variety character perform better than existing varieties. 1. Physical Purity 2. Optimum moisture 3. Genetic Purity 4. Seed viability 5. Seed uniformity 6. Seed Health
  • 4. • What are the Characters of good quality Seeds ? 1. Improved variety: Yield is above by 20-25% than the existing variety and some desirable attributes like disease resistance, drought resistance, salt tolerance etc., with good yield potential. 2. Genetic Purity: a) True type. b) It has direct effect on the yields. 3. Physical Purity: A seed lot is composed of pure seed, inert mater, broken seeds, undersized seeds, soil and dust particles weed seeds, etc. • Pure seed together with germination gives the planting value of the seed lot. 4. Seed germination and vigour: 1. Seed germination means ability of a seed when planted under normal sowing conditions to give rise to a normal seedling. 2. Seed vigour refers to the sum total of all seed attributes that give effective plant stand in the field. 3. Higher germination percentage and vigour gives adequate plant population and uniform growth, which have profound effect on, yield and determine the planting value of the seed.
  • 5. 5. Freedom from weeds and other crop seeds: • The certain weed species, which are very harmful to the crop and once established they are difficult to eradicate. • An absolute freedom from seed of such species is highly desirable and is one of the important criteria for determining the planning quality of seeds. 6. Seed health: refers to the presence or absence of disease organisms or insect pests on the seed. The quality of a seed lot depends on its health, hence the seed should be free from seed borne disease and insect pests. 7. Seed moisture: determining the seed germination and viability during storage. At high seed moisture content there is high incidence of pest attack and at moisture content above 16% seed get heated and the viability is lost. Hence the seed should be stored at safe moisture levels of 11-13%. 8. Seed size, weight and specific gravity: found to have positive correlation with seed germination and vigour in many crops. Therefore the seed should be bold with high specific gravity.
  • 6. 9. Seed Colour: 1. reflects the condition during seed maturation. 2. The farmers from ancient times have regarded good normal shine as invariable quality guides. 3. The colour and shine deteriorates only when the weather conditions are adverse during maturation or when insects infest the crop or when it is handled badly.