Free Plant Breeding and Genetics MCQs with Answers

• A. 100 plants
• B. 200 plants
• C. 300 plants
• D. 400 plantsDownload Nature Guides

Explanation: For maintaining a self-pollinated commercial variety, Oka suggested a population of about 300 plants for maintenance and seed production.

• A. Hybrid
• B. Mutagens
• C. Strange organisms
• D. Transgenic organisms

Explanation: A transgenic organism carries a gene introduced through genetic engineering, often from another species.

• A. All the above
• B. Provide greater vigour
• C. Are more uniform
• D. Produce better crop

Explanation: Hybrids are produced to combine desirable parental traits, especially hybrid vigour, higher performance and greater uniformity in the…

• A. Blended variety
• B. Exotic variety
• C. Pure line variety
• D. Hybrid variety

Explanation: An exotic variety is introduced from another country or region and may be recommended directly for commercial cultivation.

• A. Abiotic resistance
• B. Vertical resistance
• C. Biotic resistance
• D. Horizantal resistance

Explanation: Biotic resistance is resistance against living agents such as insects, fungi, bacteria, viruses or nematodes.

• A. 5 Meters
• B. 4 Meters
• C. 3 Meters
• D. 2 Meters

Explanation: Wheat is largely self-pollinated, so only a small isolation distance is needed to prevent mechanical mixing or occasional outcrossing; the…

• A. 400 meters
• B. 800 meters
• C. 200 meters
• D. 100 meters

Explanation: Sunflower foundation seed requires a 400-metre isolation distance because sunflower is mainly cross-pollinated and unwanted pollen can…

• A. 100 meters
• B. 50 meters
• C. 200 meters
• D. 3 meters

Explanation: Bhindi, or okra, is cross-pollinated to a significant extent, so foundation seed production requires 200 metres of isolation from other…

• A. G. herbaceum and G. raimondii
• B. G. arborieum and G. raimondii
• C. G. hirsutum and G. raimondii

Explanation: Gossypium barbadense is an allotetraploid cotton traditionally described in agricultural texts as originating from an A-genome cotton…

• A. Hexaploid
• B. Diploid
• C. Triploid
• D. Tetraploid

Explanation: Gossypium hirsutum, the upland cotton species, is an allotetraploid with 2n = 52 chromosomes. Diploid cotton species include G.

• A. Grow out test
• B. Ageing test
• C. Tz test
• D. All the above

Explanation: A grow-out test determines genetic purity by raising seed plants and comparing their characters with the prescribed varietal description.

• A. Germ (1949)
• B. Kotowski (1926)
• C. Deloucle & Baskin (1972)
• D. Moore (1973)

Explanation: Kotowski proposed the coefficient of velocity of germination in 1926, expressing germination speed from the number of seeds germinated…

• A. Maguire (1962)
• B. Kotowski (1962)
• C. Baskin (1972)
• D. Nicolls &Heydecker (1968)

Explanation: The mean germination time formula is credited to Nichols and Heydecker (1968) and gives the average time required for seeds to germinate.

• A. Barries ei al. (1969)
• B. Maguire (1963)
• C. Moore (1973)
• D. Woodstock (1976)

Explanation: Burris and colleagues (1969) reported a positive relationship between tetrazolium staining patterns and soybean seed quality.

• A. Burries etc (1969)
• B. Moore (1973)
• C. Maguare (1962)
• D. Kotowski (1926)

Explanation: Moore (1973) described tetrazolium testing for seed-quality assessment and interpreted the topographical staining patterns of seed…

• A. 1:2
• B. 1:3
• C. 1:4
• D. 1:5

Explanation: For breeder-seed multiplication involving A and B lines, the commonly prescribed planting ratio is 1:4, with the male or maintainer rows…

• A. 500 plant progenies
• B. 400 plant progenies
• C. 300 plant progenies
• D. 200 plant progenies

Explanation: Nucleus seed production in pulses requires at least 500 plant progenies so that superior, uniform plants can be selected and their…

• A. Oxidation
• B. Plasmolysis
• C. Osmosis
• D. Deplasmolysis

Explanation: Plasmolysis occurs when a plant cell loses water and its protoplasm shrinks away from the cell wall, usually in a hypertonic solution.

• A. Cotton varieties
• B. Sugarcane varieties
• C. Wheat varieties
• D. All the above

Explanation: The Green Revolution began chiefly through the development and adoption of high-yielding, fertilizer-responsive wheat varieties…

• A. Apomictie crop
• B. Often cross pollinated crop
• C. Cross pollinated crop
• D. Self pollinated crop

Explanation: Wheat is predominantly self-pollinated because its flowers usually pollinate within the same floret before opening.