Advertisements
Advertisements
Question
What is emasculation?
Solution 1
Emasculation is removal of anthers from young bisexual flower before it releases pollen grains.
Solution 2
Removal of anthers of a flower in order to prevent self pollination is called emasculation
APPEARS IN
RELATED QUESTIONS
Name the high-yielding semi-dwarf varieties of wheat selected and introduced in India in 1963.
Which steps would you follow to develop a new variety of crop plant by selective breeding?
(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 |
How has the mutation breeding helped in improving crop varieties? Give one example where this technique has helped.
Vijaya, Padma, Kanti and Jayanti are high-yielding varieties of ______.
With the help of suitable diagram define 'bagging' and 'tagging' of flower.
What are analogous organs? Describe with one example from the plant kingdom.
Give a reason for the following:
Bagging is essential in artificial hybridization.
Answer the following question.
How did plant breeding techniques help north Indian farmers to develop cane with desired characters?
Smooth leaved and necterless cotton varieties are NOT affected by ____________.
In hybridization experiments 'true breeding' means off-springs show ____________.
Which method of plant breeding has been used to develop a powdery mildew-resistant variety of moong beans?
Sonora – 64 is a variety of ______.
Which one of the following pathogens causes cancer disease?
The scientific process by which crop plants are enriched with certain desirable nutrients is called ______.
In the area of plant breeding, it is important not only to preserve the seeds of the variety being cultivated, but also to preserve all its wild relatives. Explain with a suitable example.
What is meant by ‘hidden hunger’?
What are A, B in the following table:
| Transgenic Crop | Substance | Transgene | |
| (i) | A | Flavonoids | Chalone isomerase |
| (ii) | Rice | B | Ferritin |
Give a reason for the following:
The continuous inbreeding of crops may lead to reduced fertility and productivity. However, the self-pollinated crops do not show the ill-effects of inbreeding.
