GS PrelimsScience and TechnologyBiotechnology2014

Which of the following statements is/are correct regarding vegetative propagation of plants? 1. Vegetative propagation produces clonal population. 2. Vegetative propagation helps in eliminating the virus. 3. Vegetative propagation can be practiced most of the year. Select the correct answer using the code given below.

A

1 only

B

2 and 3 only

C

1 and 3 only

D

1, 2 and 3

Correct Answer: Option C

Explanation

1. Statement 1 is correct. Vegetative propagation is a form of asexual reproduction in plants where new individuals arise from vegetative parts (roots, stems, leaves) of a single parent. Since the genetic material comes solely from one parent without recombination, the resulting offspring are genetically identical to the parent plant, thus forming a clonal population. 2. Statement 2 is generally incorrect. Vegetative propagation methods typically perpetuate the characteristics of the parent plant, including any systemic virus infections. While specialized techniques like meristem culture (using the apical meristem which is often virus-free) can be used to *obtain* virus-free stock from an infected plant, standard vegetative propagation methods (like cuttings or grafting) do not help in eliminating the virus; they usually spread it. 3. Statement 3 is correct. Many techniques of vegetative propagation, such as taking cuttings, layering, or grafting, are not strictly limited by season in the way that seed germination often is. They can be practiced successfully during various times, i.e., most of the year, especially if environmental conditions like temperature and humidity are favorable or controlled (e.g., in a greenhouse). Therefore, statements 1 and 3 are correct.

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