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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
Write a short note on ‘Mutational breeding’.
Vijaya, Padma, Kanti and Jayanti are high-yielding varieties of ______.
Define the term water potential.
Crosses between the plants of the same variety are called
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 |
Column - I contains names of host plant while Column - II contains names of viral dieases. Find the correct option.
| Column-I | Column-II | ||
| (I) | Banana | (p) | little leaf |
| (II) | Sugarcane | (q) | bunchy top |
| (III) | Papaya | (r) | leaf roll |
| (IV) | Brinjal | (s) | grassy shoot |
| (t) | leaf curl |
Use of certain chemicals and radiation to change the base sequences of genes of crop plants is termed ______.
Name a man-made cereal? Trace how it was developed and where is it used?
Discuss briefly the technology that made us self-sufficient in food production.
Name two better yielding varieties of rice developed in India.
