Advertisements
Advertisements
प्रश्न
Explain selective breeding. Give any 'two' examples and their nutrients obtained by selective breeding.
Advertisements
उत्तर
a. In selective breeding method, plant breeders search seed or germplasm banks for existing varieties of crops which are naturally high in nutrients.
b. Then, they crossbreed these high-nutrient varieties with high-yielding varieties of crops, to provide seeds with high yields and increased nutritional value.
c. Crops with sufficient amounts of nutrients must be bred to have a measurable positive impact on human health.
d. 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.
Examples:
1. Hybrid maize with almost double the quantity of amino acids like lysine and tryptophan.
2. Wheat variety, Atlas-66 with high protein content.
APPEARS IN
संबंधित प्रश्न
How has the mutation breeding helped in improving crop varieties? Give one example where this technique has helped.
How has the breeding programme helped in improving the public nutritional health? State two examples in support of your answer.
Identify 'A', 'B', 'C' and 'D' in the given table.
| Crop | Variety | Resistance to disease |
| A | Himgiri | Leaf rust |
| Cauliflower | Pusa Shubhra | B |
| Brassica | Pusa Swarnim | C |
| Cowpea | D | Bacterial blight |
Describe the mass flow hypothesis for translocation of organic solutes (food) in plants.
While studying the history of the domestication of various cultivated plants _______ were recognized earlier.
Which one of the following crop varieties correct matches with its resistance to disease?
| Variety | Resistance to disease |
| a) Pusa Komal | Bacterial blight |
| b) Pusa Sadabahar | White rust |
| c) Pusa Shubhra | Chilli mosaic virus |
| d) Brassica | Pusa swarnim |
Which method of plant breeding has been used to develop a powdery mildew-resistant variety of moong beans?
The agriculture sector of India employs about ______.
Give few examples of biofortified crops. What benefits do they offer to the society?
Discuss briefly the technology that made us self-sufficient in food production.
