Preface 1 Introduction 1.1 Quantitative Genetics 1.2 Population Improvement: What do we mean by Recurrent Selection? 1.3 Inbred Line Development 1.4 Conclusions 1.5 References 2 Means and Variances 2.1 Genetically Narrow- vs. Broad-Based Reference Populations 2.2 Hardy-Weinberg Equilibrium 2.3 Means of Non-inbred Populations and Derived Families 2.4 Means of Inbred Populations and Derived Families 2.5 Mean of a Cross between Two Populations 2.6 Average Effect 2.7 Breeding Value 2.8 Genetic Variance 2.9 Means and Variances in Backcross Populations 2.10 Heritability, Genetic Gain, and Usefulness Concepts 2.11 Generation Mean Analysis 2.12 References 3 Resemblance Between Relatives 3.1 Introduction 3.2 Theoretical Basis of Covariance 3.3 Covariance Between Relatives as a Linear Function of Genetic Variances 3.4 References 4 Hereditary Variance: Mating Designs 4.1 Bi-parental Progenies 4.2 Pure Line Progenies (Analysis in self-pollinated crops) 4.3 Parent-Offspring Regressions 4.4 Design I 4.5 Design II 4.6 Design III 4.7 Diallel Methods: The Gardner-Eberhart Analysis II Special Case 4.8 Triple Testcross 4.9 Triallel and Quadrallel 4.10 Inbred Lines 4.11 Selection Experiments 4.12 More on F2 Populations (Special Case of p = q = 0.5) 4.13 Epistasis 4.14 References 5 Hereditary Variance: Experimental Estimates 5.1 Experimental Results 5.2 Iowa Stiff Stalk Synthetic (BSSS) 5.3 Selection Experiments vs. Mating Designs for Prediction 5.4 Epistasis Variance and Effects 5.5 Correlations among Traits and Indirect Selection 5.6 References 6 Selection: Theory 6.1 Selection among Populations 6.2 Selection of Genotypes within Populations 6.3 Intra-population Improvement: Qualitative Traits 6.4 Intra-population Improvement: Quantitative Traits 6.5 Comparing Breeding Methods 6.6 Increasing Gain from Selection 6.7 Correlation among Traits and Correlated Response to Selection 6.8 Multi-Trait Selection 6.9 References 7 Selection: Experimental Results 7.1 Measuring Changes from Selection 7.2 Improvement from Intra-population Selection 7.3 Improvement from Inter-population Selection 7.4 General Effects of Selection 7.5 Factors Affecting Efficiency of Selection 7.6 References 8 Testers and Combining Ability 8.1 Theory 8.2 Correlations between Lines and Hybrids 8.3 Visual Selection 8.4 Genetic Diversity 8.5 Testing Stage 8.6 General vs. Specific Combining Ability 8.7 References 9 Inbreeding 9.1 The Need for Maize Artificial Pollination 9.2 Early Reports of Inbreeding 9.3 Inbreeding Systems 9.4 Inbreeding due to Small Population Size 9.5 Estimates of Inbreeding Depression 9.6 Frequency of Useful Lines 9.7 Types of Hybrids Produced from Inbred Lines 9.8 Heterozygosity and Performance 9.9 References 10 Heterosis 10.1 Introduction and Major Achievements 10.2 Empirical Evidence 10.3 Genetic Basis 10.4 Biometrical Concept 10.5 Heterosis and Prediction Methods across Genotypes 10.6 Components of Heterosis in Intervarietal Diallel Crosses 10.7 Conclusions 10.8 References 11 Germplasm 11.1 Origin of Maize 11.2 Classification of Maize Germplasm 11.3 Races of Maize in the Western Hemisphere 11.4 European Races of Maize 11.5 U.S. Corn Belt Germplasm 11.6 Germplasm Preservation 11.7 Potential and Use of Exotic Germplasm 11.8 References 12 Breeding Plans 12.1 Choice of Germplasm 12.2 Recurrent Selection and Germplasm Improvement 12.3 Integrating Recurrent Selection with Cultivar development 12.4 Intra-population Genetic Improvement 12.5 Inter-population Genetic Improvement 12.6 Additional Considerations for Germplasm Improvement 12.7 Additional Considerations for Inbred Line Development 12.8 References Index
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