Milestones in Seed Technology |
|
1 |
National seed corporation of India was established in 1963 |
2 |
Seed Act was enacted during 1966 |
3 |
National seed project was launched during 1976 |
4 |
Implementation of the new policy for seed development in 1988 |
5 |
National seed project (NSP) III launched in March 1990 |
6 |
Total Number of state seed corporation present in India is 13 |
7 |
New seed policy was introduced in 1988 |
8 |
Grow more food enquiry committee constituted during 1952 |
9 |
Seed rules was came into force during 1968 |
10 |
Seed control order was passed during 1983 |
11 |
World seed day started during 1961 |
Crop |
Test Weight / Seed Index |
Rice |
20-30 g |
Wheat |
36-50 g |
Barley |
35-40 g |
Pearlmillet |
5-9 g |
Grain Sorghum |
25-30 g |
Finger millet |
1.0 – 4.5 g |
Chickpea(Desi) |
140-259 g |
Chickpea (Kabuli) |
260–450 g |
Pigeonpea |
45-105 g |
Lentil |
17-38 g |
Blackgram |
36-49 g |
Greengram |
20-70 g |
Soybean |
80-150g |
Cowpea |
100-250 g |
Horsegram |
25-41 g |
Groundnut |
200-250 g |
Rapeseed and mustard |
3-5 g |
Sunflower |
40-50 g |
Safflower |
10-70 g |
Castor |
100-150 g |
Linseed |
4-8 g |
Sesame |
2.85-4.06 g |
Niger |
3-5 g |
Tobacco |
0.05-0.12 g |
Cotton (Seed Index or 100 seed weight) |
7-10 g |
Crop |
Isolation distance |
||
Foundation seed |
Registered seed |
Certified seed |
|
Rice, wheat, barley, oats, groundnut, soybean, cowpea |
Fields should be separated by a definite boundary |
- |
- |
Cotton (Upland type) |
30 m from cultivars which differ markedly |
- |
- |
Cotton (Egyptian type) |
400 m |
400 m |
200 m |
Tomato |
60 m |
30 m |
9 m |
Millets |
400 m |
400 m |
200 m |
Onion |
1600 m |
800 m |
400 m |
Grasses |
273 m |
91 m |
50 m |
Dormancy Breaking Method |
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Sl. No. |
Crop |
Methods used |
1 |
Mustard |
Pre chilling for 3-10 days at 0 – 5 ºC |
2 |
Rice |
Pre heating at 40 – 50 ºC |
3 |
Tomato |
KNO3 treatment |
4 |
Lettuce |
Pre chilling with thiourea |
5 |
Bitter guard |
Piercing with needle |
6 |
Cotton |
Soaking in conc. H2SO4 for 20 – 30 min. |
7 |
Rubber |
Seed coat removing |
8 |
Lentil |
Hot water treatment |
9 |
Apple |
Cold stratification |
Seed Moisture content v/s Storage life |
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Sl. No. |
Seed moisture content |
Storage life |
1 |
11 – 13 % |
½ year |
2 |
10 – 12 % |
One year |
3 |
9 – 11 % |
Two year |
4 |
8 – 10 % |
Four year |
Methods of Seed Treatment |
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Sl. No. |
Methods |
Examples |
1 |
Physical |
Seed coat removing, Scarification, Delinting in cotton |
2 |
Chemical |
Insecticide, Fungicide |
3 |
Biological |
Trichoderma, Azospirillum, Azotobacter, Rhizobium |
Memorizing technique: Order of seed treatment i.e., FIR – Fungicide, Insecticide, Rhizobium (Biological) |
Seed certificate and their tag colors |
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Sl. No. |
Certified for |
Tag color |
1 |
Seed weight |
Orange / Green |
2 |
Seed sample |
Blue |
3 |
Breeder seed |
Golden yellow |
4 |
Foundation seed |
White |
5 |
Certified seed |
Blue |
6 |
Nucleus seed |
Buff |
7 |
Truthful labelled seed |
Opel green |
Flowering types |
|
1 |
Basipetal – Flowering from top to bottom. Ex. Rice |
2 |
Acropetal – Flowering from bottom to top. Ex. Gingelly |
3 |
Centripetal – Flowering from centre to both sides. Ex. Pearl millet |
Minimum genetic purity of different classes of seeds |
|
Classes of seeds |
Minimum genetic purity (%) |
Foundation seed |
99.00 % |
Certified : Varieties Composites Synthetics Multi-lines |
98.00 % |
Hybrids |
95.00 % |
Sl. No. |
Types |
Examples |
1 |
Autogamous oil seed |
Ground Nut |
2 |
Allogamous oil seed |
Sunflower |
3 |
Alloautogamous oil seed |
Sesame |
4 |
Autogamous cereal |
Rice |
5 |
Allogamous cereal |
Maize |
6 |
Alloautogamous cereal |
Sorghum |
7 |
Autogamous pulse |
Green gram |
8 |
Alloautogamous pulse |
Pigeonpea |
Chemicals used for Seed Processing |
|
Chemicals / Elements |
Role |
Sulphuric acid |
Cotton delinting |
Gametocydes |
Induce production of female flowers |
Maleic hydrazide |
Arrests the potato sprouting |
Boron |
Involved in pollen grain germination |
Sodium alginate |
Used for enclosing the synthetic seed |
Ethylene |
Accumulation of ethylene leads to ecological suicide of the crop seeds at field conditions |
KH2PO4 |
Mid storage correction |
KCl |
Used for seed hardening |
Endospermous and Non endospermous seeds with examples |
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Sl. No. |
Seed category |
Examples |
1 |
Endospermous monocotyledonous seeds |
Maize, Wheat, Rice, Barley, Onion |
2 |
Endospermous dicotyledonous seeds |
Castor, Coffee, Cotton |
3 |
Non endospermous monocotyledonous |
Pothos sp., Vallisanaria sp. |
4 |
Non endospermous dicotyledonous |
Pea, Bean, Gram, Mango, Mustard, Jack fruit, Sunflower |
Must Know this |
|
1 |
First private seed company came into existence during the year 1912 |
2 |
First private seed company started in Kolkata |
3 |
First private seed company was – Sutton & Sons |
4 |
First seed testing laboratory was established at IARI in 1961 |
5 |
The first symbolic importance of seed started after the report of famine commission in 1881 |
Different methodologies and terms you come across in Seed technology |
|
1 |
Accelerated aging test was developed by Delouche & Baskin during 1942 |
2 |
Positive correlation between Tetrazolium staining with seed quality in Soybean seeds was showed by Burries in 1969 |
3 |
Grow out test helps to determine genetic purity of seeds |
4 |
The close relationship between the viability of the aleurone layer and the seedling emergence from the maize seed was shown by Germ and Kietreiber |
5 |
The use of Tetrazolium staining technique for assessing seed quality was described by Moore in 1973 |
6 |
The use of linear measurement of plumula growth as a vigour test was first suggested by Germ in 1949 |
7 |
International crop improvement association (ICIA) in 1946, classified seeds into different categories |
8 |
Seed moisture can be controlled by – Ventilation, Moisture proofing, Dehumidification, Sealed containers, Desicants |
9 |
The process of evaluation of seeds in terms of purity and germination is called Seed testing |
10 |
Hand book of seed testing was published in 1876 |
11 |
Formula for mean germination time is given by Nicolls and Heydecker in 1962 |
12 |
Foundation of international seed testing association (ISTA) led during 1924 |
13 |
Primary objective of ISTA includes - to develop, adopt and publish standard procedures for sampling and testing seeds. |
14 |
Seeds which do not absorb water are referred as Hard seeds |
15 |
Process of removal of off plants from the field of an improved variety is known as Roguging |
16 |
Association of official seed analysts (AOSA) was started during 1908 |
17 |
Primary objective of AOSA is to develop, Adopt and publish rules for testing seeds and to encourage research in seed technology |
18 |
Society of commercial seed technologists (SCST) was established in 1922 |
19 |
Small integument outgrowth of seed is called Hairs |
20 |
Pulse proteins are deficient in Methionine |
21 |
Major transportable form of amino acids in peas is Hemoserine |
22 |
Energy mobilization in seeds is enhanced by the enzyme Lyases |
23 |
Enzyme synthesis in germinating seeds is controlled by Gibberlins |
24 |
Epithelium layer of scutellum of rice is the source for α and β amylase |
25 |
Calvin cycle enzymes in castor is found in Chloroplast |
26 |
Reduced germination of Onion is due to Mn deficiency |
27 |
Pollination by animals is called as Zoophyllous |
28 |
Foundation seeds usually has 98 % purity in majority of seeds |
29 |
The seed that does not meant for general distribution to the farmers for commercial cultivation is Breeder seed |
30 |
Certification is does not required for Breeder seeds |
31 |
Grow out test is carried out to determine Genetic Purity |
32 |
Major transportable form of amino acids in legumes is Asparagine |
33 |
Major transportable form of amino acids in castor is Glutamine |
34 |
Protein present in the peanut is Arachin and Conarachin |
35 |
Protein present in soybean is Glycine |
36 |
Protein present in Hemp is Glaiden |
37 |
Protein present in peas is Vicilin |
38 |
Storage protein present in wheat is Glutelin |
39 |
Storage protein present in paddy is Albumin |
40 |
Seedlings which are unable to develop into normal plants are called Abnormal seedlings |
41 |
Cross pollinated species are highly Heterzygous and Heterogenous |
42 |
Storage protein present in barley is Hordein |
43 |
Pollen viability of cotton flower is 24 hours |
44 |
Axis in lettuce play a major role in β mannanase synthesis |