Mass selection is rerely used in

Solution (By Examveda Team)

Mass selection is rarely used in a sexually propagated species.
In mass selection, several individuals chosen based on appearance are mated; their progeny are further selected for the preferred characteristics, and the process is continued for as many generations as is desired.
It applies to both self and cross-pollinated species. It is a method of crop improvement in which plants are selected from a mixed population based on their phenotype.