Benefits of micropropagation (clonal propagation)—select the most comprehensive answer Which option best captures the major advantages of micropropagation for commercial and research applications, including speed, sanitation, and special genotypes?
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ARapid multiplication of superior clones
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BMultiplication of disease-free plants
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CMultiplication of sexually derived sterile hybrids
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DAll of the above
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EOnly (a) and (b)
Answer
Correct Answer: All of the above
Explanation
Introduction / Context:Micropropagation is widely adopted in horticulture, forestry, and seed potato programs because it provides fast, clean, and scalable clonal production. The method is especially powerful for elite, sterile, or recalcitrant genotypes that cannot be propagated sexually.
Given Data / Assumptions:
- Culture is performed under aseptic, controlled conditions.
- Source material can be indexed for pathogens to generate clean mother stocks.
- Multiplication stage can be iterated to achieve exponential plantlet numbers.
Concept / Approach:Evaluate whether each listed benefit is a recognized strength of micropropagation. Speed (rapid multiplication), sanitation (disease-free plants), and the ability to propagate sterile hybrids are all hallmark advantages.
Step-by-Step Solution:
Confirm (a): Cytokinin-driven shoot proliferation enables rapid multiplication of elite clones.Confirm (b): Meristem culture and indexing help eliminate or avoid systemic pathogens, yielding clean stock.Confirm (c): Sterile or seedless cultivars (e.g., triploids) can be multiplied vegetatively in vitro.Therefore, the most comprehensive choice is “All of the above.”Verification / Alternative check:Commercial success stories (banana, sugarcane, ornamentals) consistently cite these advantages as the rationale for adopting tissue culture pipelines.
Why Other Options Are Wrong:
- (e) omits the crucial benefit for sterile hybrids.
Common Pitfalls:Assuming sterility prevents clonal propagation; micropropagation bypasses sexual reproduction entirely.
Final Answer:All of the above