Integrating Traditional Plant Breeding with Genomic Accelerators: Pathways for Scalable Crop Improvement

The traditional plant-breeding toolkit—controlled crosses, iterative phenotypic selection, and multi-environment testing—remains the core engine of crop improvement, reliably delivering field-validated varieties that scale in real farming systems. This review synthesizes how self-pollinating, cross-pollinating, and vegetatively propagated crops confront common constraints while highlighting high-impact accelerators and practical pathways for integration with genomics, cycle compression, digital phenotyping, and participatory approaches. We find that while traditional methods stay essential, accelerators such as phased marker-assisted and genomic selection, doubled haploids, speed breeding, off-season nurseries, and high-resolution field phenotyping markedly boost genetic gains. Crop-specific gains emerge from blending pedigree and genomic selection in self-pollinators, employing recurrent selection and heterotic management in outcrossers, and applying sanitation, indexing, and tissue culture in vegetatively propagated crops. Across crops, managing diversity, engaging farmers in testing, and thoughtfully designing seed systems to enhance scalability and quality are critical. A realistic near-term path integrates genomics, cycle compression, and participation with the enduring cycle of phenotypic evaluation, field testing, and seed-system development— contingent, of course, on seed-system maturation, breeder training, and enabling policy environments.