The component lines used in development of composite variety of maize are

Solution (By Examveda Team)

The component lines used in the development of a composite variety of maize are Open-pollinated varieties.
A composite variety is a variety developed by mixing the seeds of various phenotypically outstanding lines possessing similarities in various characteristics like height, seed size, seed colour, maturity, etc.
Crossing among the selected varieties is possible because the species used are open-pollinated.