Question:
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Cytoplasmic male sterility and self incompatible line is used as female inbred for hybrid seed production of cabbage crops.
Reason R: Self incompatible lines are preferred as inbred for hybrid seed production because of stability and easy maintenance.
In light of the above statements, choose the correct answer from the options given below:
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Cytoplasmic male sterility and self incompatible line is used as female inbred for hybrid seed production of cabbage crops.
Reason R: Self incompatible lines are preferred as inbred for hybrid seed production because of stability and easy maintenance.
In light of the above statements, choose the correct answer from the options given below:
Assertion A: Cytoplasmic male sterility and self incompatible line is used as female inbred for hybrid seed production of cabbage crops.
Reason R: Self incompatible lines are preferred as inbred for hybrid seed production because of stability and easy maintenance.
In light of the above statements, choose the correct answer from the options given below:
Show Hint
Remember hybrid seed production in crucifers:
- CMS lines: Stable, prefered
- Self-incompatible lines: Less stable, require maintenance
- Both can be used as female inbreds
CMS is preferred over self-incompatibility for hybrid seed production.
- CMS lines: Stable, prefered
- Self-incompatible lines: Less stable, require maintenance
- Both can be used as female inbreds
CMS is preferred over self-incompatibility for hybrid seed production.
Updated On: Aug 19, 2026
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is NOT the correct explanation of A
- A is true but R is false
- A is false but R is true
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
This question tests knowledge of hybrid seed production in cabbage (Cole crops).
Step 2: Detailed Explanation:
Assertion A:
Cytoplasmic male sterility (CMS) and self-incompatible lines are used as female inbreds.
CMS lines have sterile pollen and no seed set without a pollen source.
Self-incompatible lines cannot set seed by selfing and require cross-pollination.
Both are used as female parents in hybrid seed production.
This statement is true.
Reason R:
Self-incompatible lines are not preferred over CMS lines because:
- Self-incompatibility is not stable (environmental influence).
- It is difficult to maintain (requires bud pollination to maintain the line).
- CMS is more stable and preferred.
This statement is false.
Step 3: Final Answer:
Thus, A is true but R is false, which corresponds to option (C).
[0.5cm]
This question tests knowledge of hybrid seed production in cabbage (Cole crops).
Step 2: Detailed Explanation:
Assertion A:
Cytoplasmic male sterility (CMS) and self-incompatible lines are used as female inbreds.
CMS lines have sterile pollen and no seed set without a pollen source.
Self-incompatible lines cannot set seed by selfing and require cross-pollination.
Both are used as female parents in hybrid seed production.
This statement is true.
Reason R:
Self-incompatible lines are not preferred over CMS lines because:
- Self-incompatibility is not stable (environmental influence).
- It is difficult to maintain (requires bud pollination to maintain the line).
- CMS is more stable and preferred.
This statement is false.
Step 3: Final Answer:
Thus, A is true but R is false, which corresponds to option (C).
[0.5cm]
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