Vidyalelo
Agriculture · Q21

Genetics And Plant Breeding

Graduate and Post Graduate · Agriculture · question 21

Q21

Self Incompatibility is controlled by two genes is found in

A.
Liliaceae
B.
Cruciferae
C.
Malvaceae
D.
Gramineae
Answer

Answer: Option D

Solution

Answer: Option D
Solution:
Self Incompatibility is controlled by two genes found in Gramineae.
Self-incompatibility (SI) is defined as the inability to produce zygotes after self-pollination in a fertile hermaphrodite plant, which has stamens and pistils in the same flower. This structural organization of the hermaphrodite flower increases the risk of self-pollination, leading to low genetic diversity.
SI is controlled by genes at the S-locus. The S-LOCUS RECEPTOR KINASE (SRK) gene encodes a serine/threonine kinase localized in the plasma membrane of the stigma epidermis.