Preface. 1. The role of plant breeding. 2. The genetic and cytogenetic basis of plant breeding. 3. Heterosis. 4. Mode of reproduction in relation to breeding methods. 5. Techniques in selfing and crossing. 6. The pure-line method of breeding naturally self-pollinated plants. 7. Hybridization as a method of improving self-fertilized plants. 8. The backcross method of plant breeding. 9. Breeding for disease resistance. 10. Breeding for insect resistance. 11. Special techniques. 12. Inheritance in small grains and flax. 13. Cotton and sorghum breeding. 14. Development of methods of corn breeding. 15. Inheritance in maize. 16. Forage-crop improvement. 17. Breeding other cross-pollinated plants. 18. Seed production. 19. Some commonly used measures of type and variability. 20. Correlation and regression in relation to plant breeding. 21. Chi-square tests. 22. Field-plot technique. 23. Experimental designs and statistical methods for simple plant-breeding experiments. 24. Heritability. Literature citations. Glossary. Appendix. Index.