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Broiler Chicken Breeds and Genetics

Modern broiler genetics is the result of sophisticated “four-way cross” breeding programs designed to achieve hybrid vigor. By crossing four distinct grandparent lines, breeders create commercial chicks that possess the best traits from each—such as the rapid breast muscle development of the Cobb 500 or the legendary robustness and leg strength of the Ross 308. In 2026, geneticists are utilizing genomic selection to identify specific DNA markers early in a bird’s life, allowing them to predict performance and health without waiting for the bird to reach maturity.

The current breeding focus has shifted toward a holistic “balanced” approach that weighs economic gain against animal welfare and climate resilience. While high growth rates remain vital, there is an aggressive push to improve cardiovascular health and skeletal integrity to support the heavy weights of modern birds. Furthermore, with global temperatures rising, new research in 2026 highlights the integration of heat-tolerant genes from indigenous tropical breeds into commercial lines. This ensures that modern broilers can maintain a low Feed Conversion Ratio (FCR) even in challenging, high-humidity environments.