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Heterosis

With regards ...

Question

With regards to the assertion and reason, choose the correct option.
Assertion: In case of vegetatively propagated crops, pure line selection is not required.
Reason: Hybrid vigour is a property of vegetatively propagated plants.

A

Both the assertion and reason are true and the reason is the correct explanation for the assertion.

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B

Both the assertion and reason are true but the reason is not the correct explanation of the assertion.

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C

Assertion is true but the reason is false

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D

Both the assertion and reason are false.

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Solution

The correct option is C Assertion is true but the reason is false
In case of vegetatively propagated crops, pure line selection is not required. Pure line selection is useful only for sexually reproducing plants. Vegetatively propagated plants will be similar to the parent.
Hybrid vigour is property of hybrids, that are produced by crossing plants with different traits, such that the progeny obtained is of a superior quality. Vegetatively propagated crops are clones of the parents because they do not involve sexual reproduction and hence do not show hybrid vigour.

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