Advancing wheat breeding using rye: a key contribution to wheat breeding history

Rye (Secale cereale L.), a close relative of wheat (Triticum aestivum L.), has significantly contributed to wheat breeding, exemplified by the global utilization of T1RS·1BL translocation lines. This highlights the strategic importance of integrating elite genes from related species into modern crop-breeding programs. This review explores the historical contributions of rye to wheat breeding and its potential in future applications. We delve into the impact of biotechnological approaches in unlocking the genetic repertoire of rye to bolster wheat improvement. Key strategies include goal-directed germplasm innovation, in-depth understanding of genetic basis, multi-omic big data and artificial intelligence (AI)-aided precision breeding, and strengthened global collaboration. These efforts are expected to maximize the potential of rye in sustainable wheat breeding.