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प्रश्न
Give reason :
Emasculation is done in a flower which is selected as female parent.
उत्तर
- Emasculation is the process of removal of the male reproductive organs from an organism. In plants, it is done by removing the stamens of a flower before they achieve reproductive maturity.
- This is usually done in bisexual flowers to prevent self pollination. Emasculation is followed by bagging the flower and then the desired pollen grains are introduced on the stigma for hybridisation.
- It is done in the flower which is selected as the female parent because after emasculation only the female reproductive parts of the flower remain in it.
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संबंधित प्रश्न
(a) Name the tropical sugar cane variety grown in South India. How has it helped in improving the sugar cane quality grown in North India?
(b) Identify 'a', 'b' and 'c' in the following table:
| No. | Crop | Variety | Insect Pests |
| 1. | Brassica | Pusa Gaurav | (a) |
| 2. | Flat bean | Pusa Sem 2 Pusa sem 3 |
(b) |
| 3. | (c) | Pusa Sawani Pusa A-4 |
Shoot and fruit borer |
What is plant breeding?
How has the breeding programme helped in improving the public nutritional health? State two examples in support of your answer.
Name the following: The semi-dwarf variety of wheat is high-yielding and disease-resistant.
Plant breeding technique has helped sugar industry in North India. Explain how.
With the help of suitable diagram define 'bagging' and 'tagging' of flower.
Answer each question in ‘One’ sentence only:
Define stock and scion.
Answer the following question.
How did plant breeding techniques help north Indian farmers to develop cane with desired characters?
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 |
The biggest constraint of plant breeding is:
