Yellow sections on leaf.

[wee2]

Howdy.
I've got 4 clones growing nicely. 1 plant has multiple yellowing sections on numerous leaves. I have seen this problem in a photo or book somewhere before, but I can't find it. Can anyone advise?
If I had to guess, I would say alcaline soil causing nutrient lock of some sort. Soil is 7.5pH, but I water with 5pH water.

Thanks.

 

[Creeperpark]

Genetics is where the variegated difference comes from. Not a soil problem, so don't try to fix it with pH adjustment or the addition of nutrients. I've had a few and one thing I can say is that the weed is excellent and will turn purple in cold temperatures. I've never had a variegated plant that I didn't like flowering. Keep us posted on the results.