Q. No.Which step in the plant breeding program actually brings about the improvement in crops?
1. Collection of variability
2. Evaluation and selection of parents
3. Cross-hybridization among selected parents
4. Selection and testing of superior recombinants
1. Collection of variability
2. Evaluation and selection of parents
3. Cross-hybridization among selected parents
4. Selection and testing of superior recombinants
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‘Atlas 66’ is an improved variety of:
1. rice rich in beta carotene
2. maize with increased tryptophan content
3. wheat having a high protein content
4. vitamin C enriched bitter gourd
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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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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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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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Which one of the following combinations would a sugarcane farmer look for in the sugarcane crop?
| 1. | Thick stem, long internodes, high sugar content, and disease resistant |
| 2. | Thick stem, high sugar content, and profuse flowering |
| 3. | Thick stem, short internodes, high sugar content, disease resistant |
| 4. | Thick stem, low sugar content, disease resistant |
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The algae Spirulina, Chlorella and the microbe Methylophilus methylotrophus can be used as a source of:
| 1. | Vitamin A and C | 2. | Minerals like calcium |
| 3. | Single Cell Protein | 4. | Omega 3 fatty acids |
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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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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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