The present volume includes the large majority of papers given at the symposium entitled "Fundamental Approaches to Plant and Animal Improvement," held at Cali, Colombia, in November, 1972. The primary focal points were on various genetic mechanisms, including gene action and mutation, the development of phenotypic attributes, and on evolution, including that controlled by man for agricultural purposes. In fact, very little referring in any particular way to animal improvement was included, while a great deal of attention was paid to higher plants and to microorganisms. On the other hand,...