Propagation: # Sexually   by seeds
# Asexually   by vegetative methods
 Plant propagation: is the multiplication of plants by both sexual and asexual means.Seed production:
Careful control of seed source is essential if we want to propagate by seeds; if cultivar is homozygous and self pollinated ...seed purity is generally assured.132

  There are four classes in seed certification programs in agronomic crops in U.S. such as cotton, alfalfa, soybean and cereal grains:
1.Countries should establish seed certification programs to protect and maintain the genetic quality of cultivars and field inspections and final seed testing should be included in such programs.For example Sansevieria plant could be propagated vegetatively by leaf cuttings, or by crown division......to keep on chimera.oLine: ......oClone: .....2.3.4.133