Bulk breeding method mainly relies on:
Bulk breeding creates a heterogeneous population after hybridization and allows natural selective forces to act over multiple selfing generations without intensive artificial culling. Seeds from F2-F5 are harvested in bulk and sown without pedigree tracking, exposing the population to prevailing biotic and abiotic stresses in target environment. Plants susceptible to disease, drought, lodging, or winter kill fail to contribute seed, while better adapted, disease-tolerant types increase in frequency through differential survival and reproductive success. This mimics Darwinian selection acting o
Ref: Suneson CA. Agronomy Journal 1956 – Bulk population breeding and natural selection. Allard Chapter 14