Question

Which one of the following is a dwarf mutant of papaya having 1 meter plant height evolved by treating the seeds with gamma irradiation?

• A. Pusa Nanha
• B. Pusa Majesty
• C. Pusa Dwarf
• D. Arka Surya

Hint:

Pusa Nanha is a dwarf mutant papaya variety developed through gamma irradiation.

Answer 1

The Correct Option is A

Concept:
Mutation breeding is a plant breeding method in which mutations are artificially induced using physical or chemical mutagens. Gamma irradiation is one of the commonly used physical mutagens.

Step 1: Understand mutation breeding.
In mutation breeding, seeds or plant parts are exposed to mutagens such as: \[ \text{Gamma rays} \] \[ \text{X-rays} \] \[ \text{Chemical mutagens} \] These mutagens create genetic changes, and useful mutants are selected for crop improvement.

Step 2: Identify the crop mentioned.
The crop mentioned in the question is: \[ \text{Papaya} \] The question asks about a dwarf mutant of papaya having about \(1\) meter plant height.

Step 3: Identify the correct variety.
Pusa Nanha is a dwarf mutant variety of papaya. It was evolved through mutation breeding using gamma irradiation.

Step 4: Eliminate other options.
Pusa Majesty, Pusa Dwarf, and Arka Surya are not the correct answers for the dwarf mutant papaya developed through gamma irradiation. \[ \therefore \text{Correct Answer is (A)} \]