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प्रश्न
Which steps would you follow to develop a new variety of crop plant by selective breeding?
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उत्तर
- In selective breeding method, plant breeders search seed or germplasm banks for existing varieties of crops which are naturally high in nutrients.
- Then, they crossbreed these high-nutrient varieties with high-yielding varieties of crops, to provide a seeds with high yields and increased nutritional value.
- Crops with sufficient amounts of nutrients must be bred to have a measurable positive impact on human health.
- Such crops must be developed with the involvement of nutritionists and should have extra nutrients, as storage, processing and cooking of the food affects their available nutrient levels
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संबंधित प्रश्न
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- White rust
- Leaf and stripe rust
- Black rot
- Jussids
Recommend the varieties of crops the farmers should grow to get rid of the existing problem and thus improve the crop yield.
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Polyploidy leads to the rapid formation of new species because:
Several South Indian states raise 2-3 crops of rice annually. The agronomic feature that makes this possible is because of ______.
It is said, that diseases are spreading faster due to globalisation and increased movement of people. Justify the statement taking the example of H5N1 virus.
You are a Botanist working in the area of plant breeding. Describe the various steps that you will undertake to release a new variety.
How the resistance in crops can be developed?
Match the following:
| Sr. No. | Column I | Column II | |
| (i) | Eutrophication | (a) | A soil erosion |
| (ii) | Biomagnification | (b) | carbon monoxide, methane |
| (iii) | Particulate pollutant | (c) | Prevention of extinction |
| (iv) | Conservation | (d) | Dust, smog |
| (v) | Gaseous pollutants | (e) | Accumulation of nonbiodegradable substances |
| (vi) | Deforestation | (f) | Death of aquatic ecosystem |
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.
