Contents 



Foreword vii 



Chapter 1. Introgression in Iris: 



A Typical Example 1 



Chapter 2. The Ecological Basis 



of Introgression 12 



Chapter 3. The Genetic Basis 



of Introgression 19 



Chapter 4. Introgression in Finite Populations 49 



Chapter 5. Introgression and Evolution 61 



Chapter 6. Special Techniques for the 



Study of Introgression 81 



Epilogue 102 



Bibliography 103 



Index 107 



IX 



