"fast flowering strains"

[grod31]

sorry to go ovr this again but whats up with these "fast flower strains
like this https://2fast4buds.com/us/seeds/purple-lemonade-fast-flowering
Photo x auto
Do they stabilize it back to photo? If so how many generations do we think?

If you cross a Fast flower with a regular photo will you get autos popping up after F2s?

 

[goingrey]

Photo x Auto ("fast") is 100% photo (autoflowering is a recessive trait).

Crossing one with a regular photo, results in a photo. After linebreeding the cross you will get a small % of autos in the F3 generation (if working with a large enough population).

 

[Popey]

fast x photo = 50% of plants with photo, 50% fast, generally 0% autoflowering
fast x auto = 50% of plants with auto, 50% fast (i.e. 50% with autoflowering and 50% without autoflowering)