Managing Breeds for a Secure Future: Strategies for Breeders and Breed Associations
Cover Page -- Half Title Page -- Title Page -- Copyright Page -- Contents Page -- Preface Page -- 1 Introduction -- 1.1 How to Use This Book -- 1.2 What Is a Breed? -- 1.3 Genetic Character of Breeds -- 1.4 Why Breeds Are Important -- 1.5 Sustaining Breeds over Time -- 2 Breed Basics -- 2.1 How Breeds Form -- 2.2 Classes of Breeds -- 2.2.1 Landraces -- 2.2.2 Standardized Breeds -- 2.2.3 Modern "Type" and "Designer" Breeds -- 2.2.4 Industrial Strains -- 2.2.5 Feral Populations -- 2.2.6 Dog Breeds -- 2.2.7 Poultry Breeds -- 2.2.8 Summary -- 2.3 How Breeds Are Lost -- 3 Breeds as Gene Pools: Variability and Predictability -- 3.1 Standardized Breeds -- 3.2 Landraces -- 3.3 Subgroups within a Breed: Bloodlines, Strains, and Varieties -- 3.4 Gene Flow into and out of Breeds -- 3.4.1 Upgrading and What It Does -- 3.4.2 Upgrading and Bloodlines -- 4 Defining an Individual Breed -- 4.1 Which Animals to Include -- 4.2 One Breed or Two -- 4.3 Breed Histories -- 4.4 Geography and Source Herds -- 4.5 Recovery of Purebred Animals into Registries -- 4.5.1 Native on Appearance -- 5 Breed Standards -- 5.1 Breed Type -- 5.2 Different Sorts of Breed Standards -- 5.3 Breed Type Reproduces Breed Type -- 5.4 Developing a Breed Standard -- 5.5 Breed Standards and Genetic Diversity -- 5.6 Breed Standards and Breed Loss -- 5.7 Standard Traits That Can Be Detrimental -- 5.8 Qualitative and Quantitative Traits -- 5.9 Changes to the Breed Standard -- 6 Principles of Genetic Management -- 6.1 Linebreeding and Inbreeding -- 6.2 Outcrossing: Crossbreeding and Linecrossing -- 6.3 Defining Matings as "Related" or "Unrelated" -- 6.4 Linebreeding or Outcrossing: Which Is Best? -- 6.5 Rational Crossbreeding -- 7 Selection as a Genetic Management Tool -- 7.1 Degree of Selection -- 7.2 Selection and Breed-Specific Traits -- 7.3 Genetic Drift -- 7.4 Single Gene Traits.