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Glossary
Sections:
Introduction
Principles of inheritance
Genotypic variation
Genotypic variation
Recombination
Re-assortment
Re-assortment (contd)
Other forms of heritable variation
Quantitative variation and heritability
Novel sources of genetic variation
The practice of plant breeding
Breeding methods
Plant Breeders' rights
New technologies for plant breeding
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Genotypic variation

Genotypic variation can be generated from hybrids in two ways:

recombination and re-assortment.

Both mix up the genetic constitution of the two parents, but neither can create new genetic variation, because none of the progeny of a hybrid have new alleles; what they do have is new combinations of existing alleles.

New genetic variation can only be introduced by mutagenesis (induced or spontaneous), introducing in exotic germplasm (including wide crosses) or transgenesis.