Development of sporophyte from gametophytic tissue without fusion of gametes is

Development of sporophyte from gametophytic tissue without fusion of gametes is Apogamy.
Apogamy is the development of sporophytes directly from gametophytic tissue without the fusion of gametes.
Apogamy is a related term that has had various meanings over time. In plants with independent gametophytes (notably ferns), the term is still used interchangeably with "apomixis", and both refer to the formation of sporophytes by parthenogenesis of gametophyte cells.