The Significance of Speed Breeding for Accelerating Genetic Improvement in Wheat

Speed breeding has emerged as a groundbreaking approach in modern plant breeding, offering the ability to drastically shorten breeding cycles and accelerate genetic gains, particularly in wheat ( Triticum aestivum L. ), one of the world’s most vital staple crops. This review explores the principles, methodologies, applications, and prospects of speed breeding in wheat improvement. By manipulating environmental factors such as extended photoperiods, controlled temperature regimes, and optimized light intensity, researchers can induce rapid growth and early flowering, enabling 4–6 generations per year compared to the conventional 1–2 generations. Core techniques include high-throughput phenotyping, growth chambers, and LED lighting systems, which facilitate faster generation turnover and the efficient fixation of desirable traits. Speed breeding has been successfully combined with advanced breeding tools such as marker-assisted selection, genomic selection, and genome editing to enhance yield, stress resilience, and climate adaptability. Case studies from the University of Maryland, the USA, highlight its effectiveness in developing speed breeding conditions that can be used to accelerate reliable assessment of FHB severity and mycotoxin deoxynivalenol accumulation in wheat varieties. Despite its promise, challenges remain, including infrastructure limitations in developing regions, risks of reduced genetic diversity, and the need for crop-specific protocol refinement. Looking ahead, opportunities lie in automation, integration with artificial intelligence for trait prediction, and expansion to underutilized cereals and legumes. Ultimately, speed breeding represents a powerful strategy to secure global food and nutritional security in the face of climate change and population growth, with the potential to revolutionize the pace and precision of sustainable wheat breeding programs.