1. The Classifications of Plant Propagation Judson et al. (1990) 1.1 Seed Propagation Mainly in Agricultural Crops(annuals, biannual, perennials) Vegetable crops(甘蓝类、白菜类、茄科类) 1.2 Apomictic Propagation Nucellus embryos- citrus, mango Adventitious embryony- Kentucky bluegrass 2021/2/22 Chapter 162021/2/22 Chapter 16 4 1. The Classifications of Plant Propagation Hudson et al. （ 1990） 1.1 Seed Propagation Mainly in Agricultural Crops (annuals, biannuals, perennials) Vegetable crops(甘蓝类、白菜类、茄科类） 1.2 Apomictic Propagation Nucellus embryos – citrus, mango Adventitious embryony – Kentucky bluegrass