Production of breeder seed in requires on isolation distance of

Production of breeder seed requires an isolation distance of 50 m.
Isolation distance is the minimum separation required between two or more varieties of the same species to keep the seed pure.
A breeder is a hundred percent physical and genetic pure seed, also the progeny of the nucleus seed.
It is multiplied in a large area as per the indent of the Department of Agriculture and Cooperation, under the supervision of the plant breeder and monitored by a committee consisting of the representatives of the state seed certification agency, ICAR nominee, and concerned breeder to maintain and check its purity.