Jules Janick is the James Troop Distinguished Professor of Horticulture at Purdue University in West Lafayette, IN, USA.

• Contributors. 1 Dedication: Ernest Robert Sears (191D-1991) Geneticist par Excellence, Cytogeneticist Extraordinaire, and a Good Man (George P. Redei).2 Molecular Biology of Cytoplasmic Male Sterility (Mark E. Williams and Charles S. Levings, III).I. Introduction.II. Plant Mitrochondria.III. cms-T of Maize.IV. Chimeric DNA Sequences Associated with CMS.V. Correlation of the T-urf13 and pcf Genes with Male Sterility.VI. Restorer Genes.VII. Mechanisms of CMS.VIII. Epilogue.Literature Cited.3 Plant Metabolism and Heterosis (David Rhodes, Grace C. Iu, Wen-Iu Yang, and Yiannis Samaras).I. Introduction.II. Genetic Models of Heterosis.III. The Metabolic Balance and Physiological Bottleneck Concepts of Heterosis.IV. The Metabolic Basis of Dominance.V. Genetic and Metabolic Distance.VI. Concluding Discussion.Literature Cited.4 Lethal Equivalents and Genetic Load (Neil O. Anderson, Peter D. Ascher, and Richard E. Widmer).I. Introduction.II. Lethal Equivalents and Genetic Diversity.III. Comparisons Between Formulae Using Multiple Inbred Generations.IV. Lethal Equivalents as Predictive Tools for Inbred Line Development.V. Implications.Literature Cited.5 Breeding for Heat Tolerance (Anthony E. Hall).I. Introduction.II. Sensitivity to Heat of Different Stages of Plant Development and Plant Processes.III. Characterizing Production Environments to Determine the Extent to Which Heat is Reducing Yield.IV. Genotype Differences in Heat Tolerance, Inheritance, and Associations with Other Characters.V. Selection Techniques and Breeding Methods.VI. Progress in Breeding for Heat Tolerance and Conclusions.Literature Cited.6 Chromosome Manipulations and Genetic Analysis in Medicago (T. J. McCoy and C. S. Echt).1. Introduction.II. Chromosome Manipulations in Medicago.III. Genetic Analysis of Medicago.IV. Summary.Literature Cited.7 Common Bean Improvement in the Tropics (Shree P. Singh).I. Introduction.II. History of Improvement in the Tropics.III. Breeding Objectives and Strategies.IV. Breeding Progress.V. Testing.VI. Conclusions and Prospects.Literature Cited.8 Breeding Cold Hardy Peaches and Nectarines (Richard E. C. Layne).I. Introduction.II. Morphological Responses to Low Temperatures.III. Physiological Responses to Low Temperatures.IV. Biochemical Responses to Low Temperatures.V. Physical Responses to Low Temperatures.VI. Germplasm Variability and Heritability.VII. Selection for Cold Hardiness.VIII. Screening Systems for Cold Hardiness.IX. Summary and Conclusions.Literature Cited.9 Genetic Resistance in the Cucurbitaceae to Insects and Spider Mites (R. W Robinson).I. Introduction.II. Sources of Resistance.III. Testing Techniques.IV. Resistance Mechanisms.V. Inheritance of Resistance.VI. Breeding for Insect Resistance.Literature Cited.Subject Index.Cumulative Subject Index.Cumulative Contributor Index.

Jules Janick is the James Troop Distinguished Professor of Horticulture at Purdue University in West Lafayette, IN, USA.

• Contributors. 1 Dedication: Ernest Robert Sears (191D-1991) Geneticist par Excellence, Cytogeneticist Extraordinaire, and a Good Man (George P. Redei).2 Molecular Biology of Cytoplasmic Male Sterility (Mark E. Williams and Charles S. Levings, III).I. Introduction.II. Plant Mitrochondria.III. cms-T of Maize.IV. Chimeric DNA Sequences Associated with CMS.V. Correlation of the T-urf13 and pcf Genes with Male Sterility.VI. Restorer Genes.VII. Mechanisms of CMS.VIII. Epilogue.Literature Cited.3 Plant Metabolism and Heterosis (David Rhodes, Grace C. Iu, Wen-Iu Yang, and Yiannis Samaras).I. Introduction.II. Genetic Models of Heterosis.III. The Metabolic Balance and Physiological Bottleneck Concepts of Heterosis.IV. The Metabolic Basis of Dominance.V. Genetic and Metabolic Distance.VI. Concluding Discussion.Literature Cited.4 Lethal Equivalents and Genetic Load (Neil O. Anderson, Peter D. Ascher, and Richard E. Widmer).I. Introduction.II. Lethal Equivalents and Genetic Diversity.III. Comparisons Between Formulae Using Multiple Inbred Generations.IV. Lethal Equivalents as Predictive Tools for Inbred Line Development.V. Implications.Literature Cited.5 Breeding for Heat Tolerance (Anthony E. Hall).I. Introduction.II. Sensitivity to Heat of Different Stages of Plant Development and Plant Processes.III. Characterizing Production Environments to Determine the Extent to Which Heat is Reducing Yield.IV. Genotype Differences in Heat Tolerance, Inheritance, and Associations with Other Characters.V. Selection Techniques and Breeding Methods.VI. Progress in Breeding for Heat Tolerance and Conclusions.Literature Cited.6 Chromosome Manipulations and Genetic Analysis in Medicago (T. J. McCoy and C. S. Echt).1. Introduction.II. Chromosome Manipulations in Medicago.III. Genetic Analysis of Medicago.IV. Summary.Literature Cited.7 Common Bean Improvement in the Tropics (Shree P. Singh).I. Introduction.II. History of Improvement in the Tropics.III. Breeding Objectives and Strategies.IV. Breeding Progress.V. Testing.VI. Conclusions and Prospects.Literature Cited.8 Breeding Cold Hardy Peaches and Nectarines (Richard E. C. Layne).I. Introduction.II. Morphological Responses to Low Temperatures.III. Physiological Responses to Low Temperatures.IV. Biochemical Responses to Low Temperatures.V. Physical Responses to Low Temperatures.VI. Germplasm Variability and Heritability.VII. Selection for Cold Hardiness.VIII. Screening Systems for Cold Hardiness.IX. Summary and Conclusions.Literature Cited.9 Genetic Resistance in the Cucurbitaceae to Insects and Spider Mites (R. W Robinson).I. Introduction.II. Sources of Resistance.III. Testing Techniques.IV. Resistance Mechanisms.V. Inheritance of Resistance.VI. Breeding for Insect Resistance.Literature Cited.Subject Index.Cumulative Subject Index.Cumulative Contributor Index.