Q. No.Which of the following steps in a plant breeding program actually brings about the improvement?
1. Germplasm collection
2. Hybridization
3. Selection of superior recombinant
4. Testing of the cultivars
1. Germplasm collection
2. Hybridization
3. Selection of superior recombinant
4. Testing of the cultivars
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Consider the following statements:
| I: | Self-pollination or selfing is the extreme form of inbreeding. |
| II: | Loss of vigor associated with inbreeding is inbreeding depression. |
| III: | Self-pollinated crops do not usually show the ill effects of inbreeding. |
The correct statements are:
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
Somatic embryo regeneration in micropropagation is induced by high concentrations of:
| 1. | Cytokinins | 2. | Gibberellins |
| 3. | Auxins | 4. | Zinc |
Interspecific hybridization and chromosome doubling have led to the creation of:
I. The modern wheat, Triticum aestivum
II. The first man-made cereal, Triticale
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Which of the following is important for successful MOET programs in cattle breeding?
| 1. | The age of the donor and the surrogate must be similar |
| 2. | There must be estrus synchronization between the donor and the surrogate |
| 3. | Both donor and surrogate undergo superovulation protocol |
| 4. | The bull and the cow must be of the same breed |
Consider the given two statements:
| I: | Inbreeding results in more recessive traits manifesting themselves in the progeny. |
| II: | Recessive traits can only occur in an offspring if present in both parents' genomes. |
1. Both I and II are correct and II explains I.
2. Both I and II are correct but II does not explain I.
3. I is correct and II is incorrect.
4. Both I and II are incorrect.
Suspension cultures grow much faster than callus culture provided they are:
1. fed with nutrients continuously
2. not exposed to sunlight
3. constantly agitated
4. deprived of oxygen
Consider the given two statements:
| I: | As a part of maintaining the germplasm collection, the stored seeds are grown periodically in the field to obtain fresh seeds. |
| II: | The germplasm collections are usually maintained at a low temperature in the form of seeds. |
1. Both I and II are correct and II explains I.
2. Both I and II are correct but II does not explain I.
3. I is correct and II is incorrect.
4. Both I and II are incorrect.
Most plant introductions in a country like India are:
| 1. | grown directly by the farm |
| 2. | ornamental plants introduced for their aesthetic values |
| 3. | used as parents in hybridization in breeding programs |
| 4. | invasive species that cause harm to the ecosystem |
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