(5)Induction of Haploidy e.g Barley h. bulbosum induces haploids in barley and wheat (6)Use for studies of evolution of Crops e.g 2n wheat-4n wheat- 6n wheat B campestris x B oleracea ---B napis (⑦) Use for heterosis In cotton:陆地棉×海岛棉—杂种F1 In vegetables: Use of vegetative heterosis Nucleus- cytoplasmic Hybrids/Fixed heterosis(5) Induction of Haploidy e.g Barley H. bulbosum induces haploids in barley and wheat (6) Use for studies of evolution of Crops e.g 2n wheat – 4n wheat – 6n wheat B. campestris x B. oleracea --- B. napis (7) Use for Heterosis In cotton: 陆地棉 × 海岛棉——杂种F1 In vegetables: Use of vegetative heterosis Nucleus – cytoplasmic Hybrids/Fixed heterosis