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प्रश्न
Explain selective breeding. Give any 'two' examples and their nutrients obtained by selective breeding.
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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.
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संबंधित प्रश्न
How has the breeding programme helped in improving the public nutritional health? State two examples in support of your answer.
Enumerate four objectives for improving the nutritional quality of different crops for the health benefits of the human population by the process of "Biofortification".
In an agricultural field there is a prevalence of the following organisms and crop diseases which are affecting the crop yield badly:
- 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.
Explain the best-suited type followed by plant breeders at present?
In hybridization experiments 'true breeding' means off-springs show ____________.
Sugarcane which grow in North India, and which do not grow in north India.
Match the columns-
| Column A | Column B | ||
| A. | Kalyan Sona | 1. | Rice |
| B. | Pusa sawani | 2. | Wheat |
| C. | IR - 8 | 3. | Okra |
Which of the following is not an objective of Biofortification in crops?
The scientific process by which crop plants are enriched with certain desirable nutrients is called ______.
Give two important contributions of Dr. M. S. Swaminathan.
