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 |
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 |
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 |
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 |
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. |
The Indian Agricultural Research Institute, New Delhi, has released several vegetable crops that are rich in vitamins and minerals. Identify the incorrectly matched:
1. | vitamin A enriched: carrots, spinach, pumpkin; |
2. | vitamin C enriched: bitter gourd, bathua, mustard, tomato; |
3. | iron and calcium enriched: spinach and bathua; |
4. | Omega fatty acids enriched: beans - broad, lablab, French and garden peas. |
Before releasing new cultivars in plant breeding programs, their testing includes all the following except:
1. | growing these in the research fields and recording their performance under ideal fertiliser application, irrigation, and other crop management practices. |
2. | testing the materials in farmers’ fields, for one growing season at selected locations in the country |
3. | comparison to the best available local crop cultivar – a check or reference cultivar |
4. | taking care of all patent and legal issues |
Consider the following two statements:
I: | An effective germplasm collection is the prerequisite of any successful plant breeding programme. |
II: | Genetic variability is the root of any breeding programme. |
1. Both I and II are true and II explains I.
2. Both I and II are true but II does not explain I.
3. I is true but II is false.
4. I is false but II is true.
Amongst the following, the number of freshwater fishes are:
Catla, Rohu, Common carp, Hilsa, Sardines, Mackerel, Pomfrets.
1. | 2 | 2. | 3 |
3. | 4 | 4. | 5 |
Regarding out-breeding, the number of correct statements is:
I. | Out-crossing is the practice of mating of animals within the same breed, but having no common ancestors on either side of their pedigree up to 4-6 generations. |
II. | Out-crossing is the best breeding method for animals that are below average in productivity in milk production, growth rate in beef cattle, etc. |
III. | A single outcross often helps to overcome inbreeding depression. |
IV. | In cross-breeding superior males of one breed are mated with superior females of another breed. |
V. | Cross-breeding allows the desirable qualities of two different breeds to be combined. |
1. | 2 | 2. | 3 |
3. | 4 | 4. | 5 |