中国农业大学：《植物营养学》课程教学资源（PPT课件）有益元素营养功能

1 Concept and Roles of Distant Cross 远缘杂交的过概念和作用 1. The Concept of Distant Cross p. 159 Distant Cross Between Species Distant cross- Distant hybridization- Wide cross Sub-distant Cross: Between Subspecies Near Cross: Between Varieties

COMMON CLONAL CROPS p.144 Food Crops Vegetables Fruit Trees Ornamental Crops

1. Sexual Reproduction 2. Modes of pollination 3.(1) Self-pollinated plants 4.(2)Cross-pollinated plants 5. 3)Often cross-pollinated plants

一、草本,节膨大。 二、单叶对生。 三、花两性,整齐,二歧聚伞花序或单生,5基数;

一、多数为草本,具根状茎、鳞茎、球茎 二、茎直立或攀援状

一、多年生草本或亚灌木。 二、花大而美丽,单生枝顶或有时成束,红、黄、白、紫各色;

一、 Concept of propagation 由旧个体产生新个体的现象叫繁殖。繁殖可以分 (一) vegetative propagation营养繁殖:扦插、压条、嫁接和分株; (二) asexual reproduction无性生殖(孢子生殖);

Study Goals of This Chapter Main Objectives in Current Plant Breeding General Principles for Decision of Plant Breeding Objectives

Hybridization Crossing Sexual Crossing Asexual Crossing Distant Crossing-interspecific Crossing Intraspecific Crossing-inter-varietal Crossing In this chapter: Hybridization Breeding i.e. CROSS BREEDING