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
Which steps would you follow to develop a new variety of crop plant by selective breeding?
Name the following:
The semi-dwarf variety of wheat is high-yielding and disease-resistant.
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.
List the two steps the classical plant breeding involves.
Answer each question in ‘One’ sentence only:
Define stock and scion.
Importing better varieties and plants from outside and acclimatizing them to the local environment is called
Match the columns-
| Column A | Column B | ||
| A. | Kalyan Sona | 1. | Rice |
| B. | Pusa sawani | 2. | Wheat |
| C. | IR - 8 | 3. | Okra |
The agriculture sector of India employs about ______.
Name the improved characteristics of wheat that helped India to achieve green revolution.
Mutations are beneficial for plant breeding. Taking an example, justify the statement.
