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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
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Autopolyploid breeding

Similar to diploid breeding, except for different Mendelian expectations

If the diploid ancestor is known, there is also the possibility of introgression from the the diploid level in two ways:

A new polyploid is made and used directly as a crossing parent with normal autotetraploid germplasm.

A hybrid is made between a diploid and the autopolyploid crop. This is usually male sterile, but it may be possible to backcross it with the crop species.

Yes, it is complicated! Please see the resources given in the beginning of the module for more information.