BOTANY

Detailed explanation-1: -The genetic purity of foundation seed should be maintained at 99.5 per cent. Certified seed is the progeny of foundation seed and its production is supervised and approved by certification agency.

Detailed explanation-2: -Definition of seed classes Nuclear seed : This is the hundred percent genetically pure seed with physical purity and produced by the original breeder/Institute /State Agriculture University (SAU) from basic nucleus seed stock.

Detailed explanation-3: -Nucleus Seed :-The nucleus seed is genetically cent percent pure and does not contain other physical impurities. The nucleus seed is produced strictly under isolation so as to avoid both genetically and physical contamination.

Detailed explanation-4: -What is genetic purity? Genetic purity refers to trueness to type, or the degree of contamination of seeds caused by undesired genetic varieties or species. The success of hybrid seed production is dependent on the genetic purity of parental lines.

Detailed explanation-5: -Higher genetically purity: Breeder /Nucleus-100% Foundation seed-99.5% Certified seed-99.0%