The male sterile line is represented as

The male sterile line is represented as A-line.
Male sterility is characterized by nonfunctional pollen grains, while female gametes function normally.
Inability to produce or to release viable or functional pollen as. a result of the failure of formation or development of functional.
CMS technology relies on three lines: the male sterile line (A) line, the cognate maintainer line (B) line, and the restorer line (R) line.
A line is a line or population which is male-sterile. Whereas the B line is a male fertile line or population capable of maintaining male sterility.