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Selective Breeding Of Chillies

Chilli breeders seek to make better varieties of plants, either for increased yields, better taste or other required attributes.

The crossing of Plant A with Plant B, will give you fruit containing F1 seeds.

F1 plants will all look 100% similar, even though they are 50% Plant A and 50% Plant B.  They are said to have a uniform progeny.

Self pollination of F1 plants will hopefully produce fruits containing F2 seeds. To clarify, the plant is F1 and its seeds are F2.

F2 plants produce at ratio of 1:2:1.  To put it another way, 25% will resemble Plant A , 25% will resemble Plant B and the remaining 50% will be somewhat different, or a new phenotype.  Remember that the seeds of an F2 plant are F3 and so on.


Now if you select the F2 plant with the desired Phenotype, so from the 50%, and grow the seed on, you will get F3 plants of the new phenotype. This will need to be repeated, each generation until you reach F9. Variations will occur and new selection will be required.Each generation the plants will require self pollination.  At generation F9 your plant will be 100% stable.

At generation F3 - 75%.

At generation F4 - 87.5%.

At generation F5 - 93.7%.

At generation F6 - 96.8%.

At generation F7 - 98.4%.

At generation F8 - 99.2%.

F1 - In genetics, the term is an abbreviation for Filial 1, literally meaning ‘first children.’

Self pollination - is the pollination of a plant with its own pollen and not that from any other plant.

Phenotypes - are the characteristics, such as plant size, fruits shape, size, colour etc,.