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Glossary
Sections:
Introduction
Principles of inheritance
Genotypic variation
Other forms of heritable variation
Quantitative variation and heritability
Novel sources of genetic variation
The practice of plant breeding
Breeding methods
Breeding methods
Self pollinators: Mass selection
Self pollinators: Pure line selection
Self pollinators: Pedigree selection
The pedigree breeding funnel: wheat example
Self pollinators: Single seed descent and doubled haploid lines
Single seed descent
Single seed descent, contd
Doubled haploids
Self pollinators: Back-cross breeding
Self pollinators: male sterility and F1 hybrids
Manual emasculation
Chemical sterilization
Genetic male sterility
Cross pollinators: F1 hybrids
Cross pollinators: F1 hybrids, contd
Polyploids
Polyploids contd
Ploidy level affects fertility
Autopolyploid breeding
Alloployploid breeding
Vegetatively propagated crops
Tree crops
Participatory plant breeding
Plant Breeders' rights
New technologies for plant breeding
Untitled Document

Participatory plant breeding

Here, selection is conducted in farmers' fields (rather than on a breeding station). The idea is to include the farmers' understanding of their crops as an input into the selection process.

PPB is not really a "breeding" system, it is a "selection" system; the breeder's job is still to generate the variation, and the farmers' to determine what plant types are best suited for their production system.

A hard decision is how early in the breeding cycle the farmers should best become involved. If the stage is too late, then much of the variation of relevance to the farmers may have been discarded by the breeder. If it is too early, then the breeding populations may not be homogeneous enough for non-replicated, subjective and largely uncontrolled trials to make sense.