Content: IntroductionOf Blending, Beans, and Bristles: The Foundations of QTL Mapping, A.H. PatersonFundamental PrinciplesMolecular Tools for the Study of Complex Traits, M.D. Burow and T.K. BlakeExperimental Design Considerations in Analysis of Complex Traits, G.A. Churchill and R.W. DoergeComputational Tools for Study of Complex Traits, B.-H. LiuQTL Mapping in Outbred Pedigrees, C.G. WilliamsMapping QTLs in Autopolyploids, S.-C. Liu, Y.-R. Lin, J.E. Irvine, and A.H. PatersonQTL Analysis under Linkage Equilibrium, J.F. Taylor and J.L. RochaMolecular Analysis of Epistasis, Z. LiQTL Mapping in DNA Marker-Assisted Plant and Animal Improvement, A.H. PatersonQTL Analyses: Power, Precision, and Accuracy, W.D. BeavisHigh-Resolution Mapping of QTLs, A.H. PatersonCompilation and Distribution of Data on Complex Traits, D.W. BigwoodCase HistoriesCase History in Plant Domestication: Sorghum, An Example of Cereal Evolution, A.H. Paterson, K.F. Schertz, Y. Lin , and Z. LiCase History in Crop Improvement: Yield Heterosis in Maize, C.W. StuberCase History in Germplasm Introgression: Tomato Genetics and Breeding Using Nearly Isogenic Introgression Lines Derived from Wild Species, D. Zamir and Y. EshedCase History in Genetics of Long-Lived Plants: Molecular Approaches to Domestication of a Fast-Growing Forest Tree: Populus, T. BradshawCase History in Animal Improvement: Mapping Complex Traits in Ruminants, M. GeorgesCase History in Animal Improvement: Genetic Mapping of QTLs for Growth and Fatness in the Pig, L. Andersson et al.Case History in Humans: Mapping QTLs for Complex Traits in Humans, H. Sakul and L.R. CardonSocial Impact of QTL MappingFrom Malthus to Mapping: Prospects for an Impact of Genome Analysis on the World Food Supply, J. Xiao and S.R. McCouchEthical Consequences of Mapping QTLs for Complex Human Traits, J.C. Crabbe and J.K. BelknapEpilogueProspects for Cloning the Genetic Determinants of QTLs, A.H. PatersonIndex