84 General Procedure for Hybrid Breeding 杂种优势的遗传基础 Types of Hybrids(or Hybrid varieties) Inter varietal Hybrid品种间杂种( Chemical way: wheat) Inter inbred line Hybrid自交系间杂交种( Maize) Inter self-incompatable line hybrid自交不亲和系杂交种 Inter specific Hybrid种间杂种Coon) Inter cytoplasmic vs nucleate hybrid核质杂种 Male sterility Hybrid雄性不育杂种(Rice) Three-line Hybrid Two-line Hybrid One-line Hybrid§4 General Procedure for Hybrid Breeding 杂种优势的遗传基础 1. Types of Hybrids (or Hybrid Varieties) ▪ Inter varietal Hybrid 品种间杂种(Chemical way: wheat) ▪ Inter inbred line Hybrid 自交系间杂交种(Maize) ▪ Inter self-incompatable line Hybrid 自交不亲和系杂交种 ▪ Inter specific Hybrid 种间杂种(Cotton) ▪ Inter cytoplasmic vs nucleate Hybrid 核质杂种 ▪ Male sterility Hybrid 雄性不育杂种 (Rice) Three-line Hybrid Two-line Hybrid One-line Hybrid