How does the bulk-population method differ from pedigree breeding?

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Close-up of triticale grains scattered on a wooden surface with several wheat-like triticale heads lying on top. — Plant breeding Triticale is a hybrid of rye and wheat.

In plant breeding, the pedigree and bulk-population methods are distinct approaches to managing the genotypes that emerge following hybridization.

Pedigree Breeding

The pedigree method is characterized by meticulous record-keeping of parent-progeny relationships. Breeders select superior individuals in successive generations, starting from the $F_{2}$ generation. As the population moves toward homozygosity, the focus shifts from individual plant selection to evaluating families. This method allows for precise control and tracking of desirable traits throughout the breeding process.1

Bulk-Population Method

The bulk-population method differs primarily in its handling of generations and record-keeping:
* Management: The crop is harvested in mass, and seeds are used to plant the next generation in large plots at commercial rates. No records of ancestry are maintained.1
* Selection: It relies heavily on natural selection to eliminate plants with poor survival value, supplemented by artificial selection techniques, such as screening for seed size or maturity.1
* Advantage: The primary benefit is the ability to handle a very large number of individuals inexpensively before making final selections.1