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breeding Phenotypic segregants

I don't know how well terms are defined and known here and so wanted to introduce an extremely useful term:

Phenotypic segregants

These are the plants that arise from seeds of a single fruit or plant through each different group of genes (alleles) manifesting in visibly distinct ways. If, for example, you have a batch of seed that produces plants with and without purple leaves, each type of plant that the seeds produce that is distinct is a phenotype and their distinction segregates them from the others.

In dumbed down terms people often say that a type of seed throws a type of plant, for example a PDN X Bhut Jolokia (like Red Monster or Rouge Noir) upon selfing (filial 2 or F2 generation) can throw super-hots, partials and not-super-hot. (SHM+, SHM+ het and SHM-)

Those F2 groups are all phenotypic segregants of the PDN x Bhut.

This is extremely important because many seeds circulating today are crosses themselves and so they produce phenotypic segregants, which are not the same.

To continue with the example, a PDN X Rouge Noir plant contains 2 sets of alleles and it can only pass on one of those sets in cross pollination. If you cross it with ANY plant it will produce phenotypic segregants, which are not equal. Any cross with a cross and any other plant will produce seeds that grow plants with differing sets of alleles.

Segregants can provide a lot of information about the alleles present and that information is very useful to breeding.