Advertisements
Advertisements
प्रश्न
Give reason :
Emasculation is done in a flower which is selected as female parent.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Identify ‘a’, ‘b’ and ‘c’ in the following table:
| S. 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 |
How has the mutation breeding helped in improving crop varieties? Give one example where this technique has helped.
What is emasculation?
What are components of water potential? Explain
While studying the history of the domestication of various cultivated plants _______ were recognized earlier.
Importing better varieties and plants from outside and acclimatizing them to the local environment is called
Discuss the importance of testing of new plant varieties in a geographically vast country like India.
Bioforified crops are ______.
Match the following:
| Sr. No. | Column I | Column II | |
| (i) | Eutrophication | (a) | A soil erosion |
| (ii) | Biomagnification | (b) | carbon monoxide, methane |
| (iii) | Particulate pollutant | (c) | Prevention of extinction |
| (iv) | Conservation | (d) | Dust, smog |
| (v) | Gaseous pollutants | (e) | Accumulation of nonbiodegradable substances |
| (vi) | Deforestation | (f) | Death of aquatic ecosystem |
Given below are the steps involved in plant breeding program. Identify the correct sequence of these steps.
i. collection of variabilities
ii. hybridization
iii. evaluation and selection of parents
iv. testing, release and commercialization of new cultivars.
v. selection and testing of superior recombinants.
