Poultry Breed Directory: Genetics, Production & Yields
A master database classifying commercial meat broilers, egg layers, and backyard heritage breeds.
Scientific Overview
Commercial poultry production utilizes specialized genetic lines developed through intensive selection. Breeds are broadly classified into high-yield broilers (meat), high-productivity layers (eggs), and dual-purpose heritage breeds suited for backyard flock management.
Commercial Meat Strains (Broilers)
Broiler breeds like Ross 308, Cobb 500, and Hubbard are bred for rapid skeletal development, high breast meat yield, and extremely low feed conversion ratios (FCR). They require intensive climate controls, automated tunnel ventilation, and feed formulas balanced for digestible amino acids to reach market weight (2.5 kg) within 35-42 days.
Commercial Egg Strains (Layers)
Laying breeds like Lohmann Brown, Hy-Line, and ISA Brown are selected for prolonged egg production laying cycles (laying 320-330 eggs per year), high peak lay rates (>95%), and strong shell calcification. They have low body weight to minimize maintenance feed costs and require high dietary calcium to support shell deposition.
Heritage & Dual-Purpose Breeds
Heritage breeds such as Rhode Island Red, Sussex, Orpington, and Plymouth Rock are dual-purpose birds providing moderate egg laying and meat yield. They exhibit high disease resistance, excellent outdoor foraging abilities, and weather hardiness, making them ideal for backyard farming and organic free-range operations.
All scientific data, diagnostic criteria, and performance benchmarks presented on this page are derived from published peer-reviewed journals and official veterinary codes:
- Avian Pathology & Diagnostics: World Organisation for Animal Health (WOAH, 2023). Manual of Diagnostic Tests and Vaccines for Terrestrial Animals. Paris, France.
- Poultry Diseases & Histology: Swayne, D.E., et al. (2020). Diseases of Poultry (14th ed.). Wiley-Blackwell / American Association of Avian Pathologists.
- Nutrition & Feed Chemistry: Leeson, S. & Summers, J.D. (2001). Commercial Poultry Nutrition (3rd ed.). University Books, Guelph, Ontario.
- Commercial Breed Standards: Aviagen (2024). Ross 308 & Cobb 500 Broiler Performance Objectives. / Lohmann Breeders (2024). Lohmann Brown Management Guide.