Today, all our major food crops are derived from:
1. Wild varieties
2. Domesticated varieties
3. Genetically modified varieties
4. Plant tissue culture
A collection of all the alleles of all the genes of a crop plant is called:
1. | germplasm collection | 2. | protoplasm collection |
3. | herbarium | 4. | somaclonal collection |
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 |
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 |
Resistance to the yellow mosaic virus in bhindi (Abelmoschus Esculentus) was possible by:
1. | Conventional hybridization | 2. | Mutations |
3. | Genetic engineering | 4. | Tissue culture |
Match biofortified crops in Column I with enriched nutrients in Column II and select the correct answer from the codes given:
|
Column I |
|
Column II |
A. |
Maize hybrids |
a. |
lysine and tryptophan |
B. |
Atlas 66 |
b. |
high protein content |
C. |
Golden rice |
c. |
Vitamin A |
Code
A | B | C | |
1. | a | b | c |
2. | a | c | b |
3. | b | a | c |
4. | c | a | b |