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प्रश्न
Write a short note on ‘Mutational breeding’.
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उत्तर
The breeding technique in which mutations are induced using mutagens and mutant organisms with the desired characters is known as mutational breeding. In plant breeding, this technique is employed to obtain resistant varieties of plants, e.g. moong beans to yellow mosaic virus and powdery mildew.
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संबंधित प्रश्न
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.
Define Osmotic pressure.
Define the term water potential.
Describe briefly various steps of plant breeding methods.
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 ______.
Life style diseases are increasing alarmingly in India. We are also dealing with large scale malnutrition in the population. Is there any method by which we can address both of these problems together?
Name the improved characteristics of wheat that helped India to achieve green revolution.
Discuss briefly the technology that made us self-sufficient in food production.
Name two better yielding varieties of rice developed in India.
