《植物育种学》课程教学资源（PPT课件讲稿，英文版）（二）CHAPTER 8 CROSS BREEDINGIN CLONAL CROPS

CHAPTER 8 CROSSEREEDIGINICLONAL ROPS 练系亲突育神 BY s Niu Yingze (牛应门 Dept of Plant Breeding and Seed Engineering

CHAPTER 8 CROSS BREEDING IN CLONAL CROPS 营养系杂交育种 BY Niu Yingze （牛应泽） Dept. of Plant Breeding and Seed Engineering

COMMON CLONAL CROPS p 144 Food Crops egetables Fruit trees Ornamental Crops

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

一、 Genetic Characteristics of Clonal Crops 营养系品种的性状遗传特点 Genetic Behavior Clonal Plants p 145-148 Quantitative Characters and Qualitative Characters High Heterozygosity Large segregation in seed Offspring Divergent Variation and Intermediate average Abnormal segregation

Genetic Behavior Clonal Plants p. 145-148 • Quantitative Characters and Qualitative Characters • High Heterozygosity • Large Segregation in seed Offspring • Divergent Variation and Intermediate average • Abnormal Segregation 一、 Genetic Characteristics of Clonal Crops 营养系品种的性状遗传特点

二、 The Selection and combination of Parents 杂交亲本选择和选配 1. Selection parents 2. Principles of Parental Combination Compare with Cross Breeding

二、 The Selection and Combination of Parents 杂交亲本选择和选配 1. Selection Parents 2. Principles of Parental Combination Compare with Cross Breeding

三、 The Juvenile period of clonal Propagated Plants 营养繁殖植物的童期 1. TThe juvenile period童期 of clonal plants 2. Shortening of the Juvenile period

三、The Juvenile Period of Clonal Propagated Plants 营养繁殖植物的童期 1. The Juvenile Period 童期 of Clonal Plants 2. Shortening of the Juvenile Period

四、 Selection of offspring 杂种的选择 1. Principles of selection 2. Techniques of Selection

四、Selection of Offspring 杂种的选择 1. Principles of Selection 2. Techniques of Selection

84 Selection Breeding of Sexually propagated plants有性繁殖植物的选择育种 1. Selection Method (1) Single character based (2)Integrated characters Based(Index selection) Calculation of selection index: mean values of characters weight coefficients inheritability

§4 Selection Breeding of Sexually propagated plants 有性繁殖植物的选择育种 1. Selection Method (1）Single character based (2) Integrated characters Based (Index Selection) Calculation of selection index: mean values of characters weight coefficients inheritability

2. Procedure of Pedigree breeding p., Fig 5-1 (1) selection of superior individuals (2) plant-row (line)tests 3 )line tests (4) Regional trials and productional trials (5)Seed multiplication and crop extension 3. Procedure of Bulk selection Breeding p74. Fig 5-2 (1) Bulk selection of elite individuals (2)Comparative trials (3)Seed multiplication and crop extension

2. Procedure of Pedigree Breeding p 73., Fig.5-1 (1) selection of superior individuals (2) plant-row (line) tests (3) line tests (4) Regional trials and productional trials (5) Seed multiplication and crop extension 3. Procedure of Bulk Selection Breeding p 74. Fig 5-2 (1) Bulk selection of elite individuals (2) Comparative trials (3) Seed multiplication and crop extension

4. How to Enhance the Efficiency of selection Breeding (1) Selection of Objective populations (2)Selection Criteria (3)Selection conditions (4)Number of plants and Time of Selection (5) Inheritability of plant characteristics; Effects of direct and indirect Selection

4. How to Enhance the Efficiency of Selection Breeding (1) Selection of Objective populations (2) Selection Criteria (3) Selection conditions (4) Number of plants and Time of Selection (5) Inheritability of plant characteristics; Effects of direct and indirect Selection

85 Selection Breeding of Asexually propagated plants无性繁殖植物的选择育种 1. Selection of Bud mutation (1)Characteristics of Bud mutations Bud mutations are somatic cell mutations Characteristics: Diversified orientation of the variations Reproducible variations Stable variations Chimericalvariations: periclinal周缘的, sectorial横向的 Limitations: small probabilities to happen

1. Selection of Bud Mutation §5 Selection Breeding of Asexually propagated plants 无性繁殖植物的选择育种 (1) Characteristics of Bud mutations Bud mutations are somatic cell mutations Characteristics: . Diversified orientation of the variations . Reproducible variations . Stable variations . Chimerical variations: periclinal 周缘的, sectorial 横向的 . Limitations: small probabilities to happen