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Agriculture · Q144

Genetics And Plant Breeding

Graduate and Post Graduate · Agriculture · question 144

Q144

Consider the following statements associated with self-incompatibility in crop plants 1. Heteromorphic system shows only gemetophytic control of self-incompatibility. 2. Both sporophytic and gametophytic controls of self-incompatibility are found in homomorphic system. Which of the statements given above is/are correct?

A.
Only 1
B.
Only 2
Answer
C.
Both 1 and 2
D.
None of these

Answer: Option B

Solution

Answer: Option B
Solution:
The following statements that are correct associated with self-incompatibility in crop plants are both sporophytic and gametophytic controls of self-incompatibility found in the homomorphic system.
Self-incompatibility is a widespread mechanism in flowering plants that prevents inbreeding and promotes outcrossing. The self-incompatibility response is genetically controlled by one or more multi-allelic loci and relies on a series of complex cellular interactions between the self-incompatible pollen and pistil.