ABSTRACT
Summary ................................................................................................................ 291 20.1 Introduction................................................................................................. 291 20.2 Definitions .................................................................................................. 292 20.3 Measurements ............................................................................................. 292
20.3.1 Unconditioned Stress Responses, Forced Exposure...................... 293 20.3.2 Unconditioned Stress Responses, Choice Tests............................. 295 20.3.3 Conditioning Experiments.............................................................. 295 20.3.4 Interpreting Emotionality through a Multivariate Approach......... 296
20.4 Genetic Analysis......................................................................................... 298 20.4.1 Selection Experiments .................................................................... 298 20.4.2 Quantitative Genetic Analysis........................................................ 299 20.4.3 Genetic Links between Different Traits......................................... 299 20.4.4 The QTL Chase .............................................................................. 300 20.4.5 Gene Targeting and Transgenesis .................................................. 303
References.............................................................................................................. 303
The aim of this chapter is to introduce the reader to the universe of experimental approaches available for the genetic study of emotionality, the focus being on the use of animal models. First, some preliminary conceptual issues will be discussed and then an overview of the main methods of measuring and interpreting the socalled emotional behaviors will be presented. Finally we present the classical and modern strategies to determine the genetic basis of variance in emotionality-related traits.
