From photoperiod to Mothers & Clones

Just to side step the photoperiod issue... I have set up a small veg garden adjacent to the bloom garden. I put a 125W Envirolite in there with an adequate extractor. Both pieces of equipment are running all the time. In to the room I put 3 slow developing clones in 15L pots and 6 fresh cuttings from my G13 plants in a propagator. The clones were very wilted on the day I put them in the propagator.

They were initially on 18/6 with all the other plants in the bloom room. Since dropping the lights in the bloom room to 12/12 I've put everything I want to veg under the 125W Envirolite. Within 36 hours I am seeing more development with the slow takers and the clones are upright in the propagator.

This shows me that 24hours of light must be useful to some degree. Also, the correct spectrum of light for the right phase.

The G13 have grown rapidly in veg under one 600W HPS for the 16 or so days they were vegging for. While the other strain was really slow. I'm confusing myself a bit now, so I'm going to hit my joint a few times then finish up....
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OK! I think some strains that are quite resilient in the genetic characteristics will thrive under numerous variable conditions; including 18/6, 20/4, and 24/0 veg regime. I have vegged G13 and femenised PPP for 24hours in the past and growth was alarming when the lights were turned down. I did wonder if vertical growth would ever cease!

I think other strains, usually recommended by seed companies for experienced growers, need a more refined environment.

Can any experienced growers shed some light on the aspect of Genetics Vs Photoperiod?

It would be interesting if dependency on genetics is a contributing factor to how one should adjust their gardens environment. Example: If I grow a strain indigenous to an equatorial region, should I adjust my garden environment to replicate important aspects of the climate in that geographic location to maximize my yield? As a guess, a plant in its originating environment should yield maximum beneficial produce comparative to a more northern or southern hemisphere climate put in its place....

Thank you ladies and gentlemen!!