Haploids from Unpollinated Ovaries - Production of a haploid individual by development of an unfertilized egg cell as a result of delayed pollination is referred to as gynogenesis. Gyno genesis is found in the interspecific cross Solanum tuberosum (2n = 4x) x S. phureja (2n = 2x), resulting in the production of a dihaploid (2n = 2x) potato.

San Noeum (1976) was the first to demonstrate that gynogenesis, an essentially in vivo phenomenon, can be induced under in vitro conditions. She obtained gynogenic haploids using an ovary culture of Hordeum vulgare.