The process of breeding cannabis solely within the seed lot with no external pollen inputs.
Merriam-Webster Online Dictionary
inbreeding (noun)1.
the interbreeding of closely related individuals especially to preserve and fix desirable characters of and to eliminate unfavorable characters from a stock
2.
confinement to a narrow range or a local or limited field of choice
inbreeding, incestuous breeding, self-fertilization, kinship, genetic uniformity
