Question

Which plant breeding technique was used to produce NP 836 variety of wheat (rust resistant), Indore-2 variety of cotton (resistant to boll worm), Regina-II variety of cabbage (resistant to bacterial rot), etc.?

• A. Hybridization.
• B. Polyploidy breeding.
• C. Mutation breeding.
• D. rDNA technology.

Hint:

These disease-resistant varieties were selected from plants treated with radiation or chemicals.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept
In mutation breeding, plants are treated with mutagens such as radiation or chemicals and useful mutants are selected.

Step 2: The varieties
NP 836 wheat, Indore-2 cotton and Regina-II cabbage were obtained as useful induced mutants with disease or pest resistance.

Step 3: Compare the options
Hybridisation, polyploidy and rDNA technology were not used for these varieties. So the technique is mutation breeding.

Final Answer:
These varieties were produced by mutation breeding. \[ \boxed{\text{(C) }\text{Mutation breeding}} \]