Question

Male sterile cytoplasm in crop plants usually arises from- 
• [(A).] Inter-specific hybridization 
• [(B).] Self-incompatibility 
• [(C).] Spontaneous mutation 
• [(D).] Induced mutation through Ethium Bromide Choose the correct answer from the options given below: 
 

• A. (A), (B) and (C) only.
• B. (A), (B) and (D) only.
• C. (A), (C) and (D) only.
• D. (B), (C) and (D) only.

Hint:

CMS is maternally inherited because organelles (like mitochondria) are transmitted through the egg cell, not the pollen.
To produce fertile hybrid seeds using a CMS line, breeders must cross it with a male line carrying nuclear Restorer of fertility (Rf) genes.

Answer 1

The Correct Option is C