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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
In Brassica (rapeseed, mustard)........................ varietys is resistant to Aphids.
(a) Pusa A-4
(b) Pusa Gaurav
(c) Pusa Sawni
(d) . Pusa Shubra
Answer each question in ‘One’ sentence only:
Define stock and scion.
Give the scientific term used for the preservation of germplasm at a very low temperature.
Give a reason for the following:
Bagging is essential in artificial hybridisation.
Answer the following question.
How did plant breeding techniques help north Indian farmers to develop cane with desired characters?
Smooth leaved and necterless cotton varieties are NOT affected by ____________.
Sonalika and Kalyan Sona are varieties of ______.
Discuss the two main limitations of plant hybridization programme.
What are A, B in the following table:
| Transgenic Crop | Substance | Transgene | |
| (i) | A | Flavonoids | Chalone isomerase |
| (ii) | Rice | B | Ferritin |
Given below are the steps involved in plant breeding program. Identify the correct sequence of these steps.
i. collection of variabilities
ii. hybridization
iii. evaluation and selection of parents
iv. testing, release and commercialization of new cultivars.
v. selection and testing of superior recombinants.
