Genetics & breeding.
Cannabis Polyploidy: Tetraploids, Triploids and Colchicine
What polyploidy is, how a tetraploid differs from a triploid, why triploids are sterile and how colchicine doubles chromosomes — explained in plain terms.
Mr.GramGram · 12 June 2026 · 10 min read
Colchicine: toxicity and safe handling practice
Colchicine doubles chromosomes but is extremely toxic. Protective equipment, seed treatment protocol, neutralisation and disposal — a practitioner’s breakdown.
Mr.GramGram · 08 June 2026 · 8 min read
Advanced breeding methods: haploids, tissue culture and mutagenesis
Doubled haploids, tissue culture, mutagenesis, economical screening and DNA markers — how modern technology speeds up breeding stable strains.
Mr.GramGram · 07 June 2026 · 8 min read
Cannabis breeding methods: F1, outcrossing, backcross and IBL
How strains are created and stabilised: outcrossing and heterosis, backcrossing with stabilisation percentages, IBL lines, selfing and reciprocal crosses.
Mr.GramGram · 06 June 2026 · 10 min read
Autoflowering and fast-flowering — why no dominant autoflower exists
Why autoflowering is a recessive “broken” trait, how incomplete dominance turns it into fast-flowering, and which fast phenotypes exist.
Mr.GramGram · 05 June 2026 · 8 min read
F1 hybrids, polyhybrids and inbreeding depression — the differences
What F1 and heterosis are, why an S1 is not the same strain, how a polyhybrid differs from an F1, and where inbreeding depression sets the limit.
Mr.GramGram · 04 June 2026 · 9 min read
Dominant and recessive cannabis traits — how to read a strain’s genetics
What dominant and recessive genes are, why purple color “beats” green, and how to predict offspring traits with a Punnett square.
Mr.GramGram · 03 June 2026 · 7 min read
Why we ship cuts in from California and hold them to F4
Selection is not magic. It is four seasons of repetition and the discipline to drop what does not repeat.
Mr.GramGram · 14 February 2026 · 5 min read