A new method of improving a parent plant to introduce improved traits such as fast growth, A method of producing large number of micropropagules (seed material) rapidly from desired strains, A means of storage of germplasm in viable form, i.e., as somatic embryos, on agar plates, An improved method of cultivation of seaweeds which reduces adverse impact of the vagaries of nature such as strong water current and damage to crops by grazers and epiphytes and yet allows the same or better growth rate than what is realised with the parent plant in open waters, An improved method of cultivation which provides material of highest purity free from all contaminants detrimental to the quality of final processed end product.