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-hybridization among the selected parents
IV. Evaluation and selection of parents
V. Testing, release and commercialization 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
The best breeding method for animals that are below average in productivity in milk production would be:
1. Inbreeding
2. Out-crossing
3. Cross-breeding
4. Interspecific hybridisation
Identify the option where all columns are not correctly matched:
Crop Variety Resistant to
1. Wheat Himgiri Leaf rust
2. Brassica Pusa Swarnim White rust
3. Cowpea Pusa komal Black rot
4. Chilli Pusa sadabahar Leaf curl
In mung bean the resistance to yellow mosaic virus and powdery mildew were introduced by:
1. Mutations
2. Hybridization
3. Tissue culture
4. Genetic engineering
Pusa Shubhra, an improved variety of cauliflower, is resistant to:
1. White rust
2. Bacterial blight
3. Black rot
4. Leaf curl
To obtain a virus free plant, what can be used as an explant in micropropogation ?
1. Apical meristem
2. Axillary meristem
3. Either apical or axillary meristem
4. Embryo
In plants, somatic embryo regeneration is induced usually by a relatively high concentration of:
(1) Benzyl amino purine
(2) IAA
(3) 2,4 - D
(4) NAA
Inbreeding depression in animals can be overcome by:
1. A single outcross
2. Out cross for many generations
3. Cross-breeding
4. Inter-specific hybridization
Identify the incorrectly matched pair:
|
Crop Variety |
Resistant to |
1. |
Himgiri |
Leaf and stripe rust |
2. |
Karan rai |
White rust |
3. |
Pusa sadabahar |
Bacterial blight |
4. |
Pusa shubhra |
Black rot |
Meristem culture is especially important to obtain:
1. Drought resistant plants
2. Virus free plants
3. Biofortified plants
4. Androgenic haploids