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प्रश्न
Explain the best-suited type followed by plant breeders at present?
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उत्तर
Mutation breeding represents a new method of conventional breeding procedures as they have the advantage of improving the defect without losing an agronomic and quality character in agriculture and crop improvement. Mutation means the sudden heritable changes in the genotype or phenotype of an organism. Gene mutations are of considerable importance in plant breeding as they provide essential inputs for evolution as well as for recombination and selection. It is the only method for improving seedless crops.
संबंधित प्रश्न
Identify ‘a’, ‘b’ and ‘c’ in the following table:
| S. No. | Crop | Variety | Insect Pests |
| 1. | Brassica | Pusa Gaurav | ‘a’ |
| 2. | Flat bean | Pusa Sem 2 Pusa sem 3 |
‘b’ |
| 3. | ‘c’ | Pusa Sawani Pusa A-4 |
Shoot and fruit borer |
How has mutation breeding helped in improving the production of mung bean crop?
Name any two common Indian millet crops.
In Brassica (rapeseed, mustard)........................ varietys is resistant to Aphids.
(a) Pusa A-4
(b) Pusa Gaurav
(c) Pusa Sawni
(d) . Pusa Shubra
State one characteristic of millets that has been improved as a result of hybrid breeding so as to produce high yielding millet crops.
Definition and importance of Imbibition
Answer each question in ‘One’ sentence only:
Define stock and scion.
Describe briefly various steps of plant breeding methods.
Wheat -Atlas 66 has high contents of ______.
In hybridization experiments 'true breeding' means off-springs show ____________.
Animal husbandry and plant breeding programmes are the examples of:
Polyploidy leads to the rapid formation of new species because:
The plant which is used for Studying hybrid vigour or heterocyst:
Mutations in plant cells can be induced by ______
Which one of the following is not a fungal disease?
The scientific process by which crop plants are enriched with certain desirable nutrients is called ______.
What is emasculation? Why and when is it done?
Give few examples of biofortified crops. What benefits do they offer to the society?
What are A, B in the following table:
| Transgenic Crop | Substance | Transgene | |
| (i) | A | Flavonoids | Chalone isomerase |
| (ii) | Rice | B | Ferritin |
