Basic concepts. Basic concepts in quantitative genetics. Basic concepts in economics. Principles of matrix algebra and selection index. Introduction to systems analysis. Economic evaluation of genetic differences. The main elements of returns and costs. Evaluation of genetic differences from profit equations. Evaluation of genetic differences by alternate methods. Long-term considerations. Construction, uses and problems of multitrait selection indices. Selection indices for non-linear profit functions. Comparison of different selection indices. Economic evaluation of breeding programs. Economic evaluation of breeding programs, theory. Comparison of alternative breeding programs. Evaluation of existing breeding programs. Crossbreeding and heterosis. Economic evaluation of heterosis. Choice of the most profitable parental combination. Planned matings together with line breeding. Glossary of symbols. References Index.