Q. No.The best breeding method for animals that are below average in productivity in milk production is:
1.
Inbreeding
2.
Out-crossing
3.
Cross-breeding
4.
Interspecific hybridization
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In micro-propagation, to obtain virus free plants, the best explants can be:
| 1. | Embryos | 2. | Anther |
| 3. | Meristem | 4. | Primary permanent tissues |
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Consider the two statements:
| I: | Inbreeding is an important strategy in animal breeding experiments. |
| II: | It exposes recessive harmful genes that are eliminated by selection. |
| 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. | Only I is correct. |
| 4. | Both I and II are incorrect. |
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In mung bean, resistance to yellow mosaic virus and powdery mildew was introduced by:
| 1. | Agrobacterium mediation | 2. | Somatic hybridization |
| 3. | Micropropagation | 4. | Mutation breeding |
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Identify the row where the crop [Column I], its variety [Column II] and resistance to disease/pest [Column III] are all correctly matched:
|
COLUMN I |
COLUMN II |
COLUMN III |
|
|
1. |
Brassica |
Himgiri |
White rust |
|
2. |
Cowpea |
Pusa Komal |
Bacterial blight |
|
3. |
Flat bean |
Pusa Sem 2 |
Shoot and fruit borer |
|
4. |
Okra |
Pusa Gaurav |
Aphids |
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The best method for producing plants free of viruses will be:
| 1. | Meristem culture | 2. | Embryo culture |
| 3. | Somatic embryogenesis | 4. | Somatic hybridization |
Conventional breeding is often constrained by the availability of a limited number of disease-resistance genes that are present and identified in various crop varieties or wild relatives. This is most commonly overcome by:
| 1. | Inducing mutations | 2. | Somaclonal variations |
| 3. | Genetic engineering | 4. | Plant introduction |
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The main reason for the success of the green revolution was:
1. Improvement in the efficiency of chemical pesticides
2. Improvement in irrigation facilities
3. Equitable distribution of land among farmers
4. Development of HYV varieties
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Arrange the following steps of a plant breeding program in a correct chronological manner:
| I. | Selection and testing of superior recombinants |
| II. | Collection of variability |
| III. | Cross hybridisation among the selected parents |
| IV. | Evaluation and selection of parents |
| V. | Testing, release, and commercialisation of new cultivars |
| 1. | II, IV, I, III, V | 2. | IV, I, II, III, V |
| 3. | II, IV, III, I, V | 4. | IV, III, II, I, V |
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Hisardale is a new breed of:
| 1. | Sheep developed by crossing Bikaneri ewes and Marino rams. |
| 2. | Sheep developed by crossing Bikaneri rams and Marino ewes. |
| 3. | Goat developed by crossing Bikaneri ewes and Marino rams. |
| 4. | Goat developed by crossing Bikaneri rams and Marino ewes. |
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