Home/About
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
Defining breeding goal(s)
Defining breeding goal(s), contd
Identifying relevant sources of genetic variation
Choice of crossing parents
Selection in segregating populations: phenotypic vs genotypic
Multilocation, multiyear testing
Pedigree records
Breeding methods
Plant Breeders' rights
New technologies for plant breeding
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Selection in segregating populations: phenotypic vs genotypic

Genotype is more precise, but only if the marker being used is a perfect one (i.e. it lies inside the gene being selected for.

Phenotype is typically more relevant, and sometimes cheaper (but note that this equation is changing as the cost of genotyping falls).

If heritability is high, phenotypic selection should almost always be preferred. But the lower it gets, the more genotyping starts to be worthwhile.

Genotypic (MAS) is particularly suited to: