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Breeding Terms For Cannabis

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From my files....


P1-The name of the parent to which a hybrid is crossed in a backcross. original parental generation used to develop F1 hybrids or stabilizing true breeding


F1- generation : The progeny produced from a cross between two parents (P1) is called First Filial or F1 generation. When you cross two different IBL strains for the FIRST time, it is called the F1 generation.

F2- generation : The progeny resulting from self hybridization or inbreeding of F1 individuals is called Second Filial or F2 generation.


Calyx - The whorl of sepals of a flower collectively forms the outer floral envelope or layer of the perianth enclosing and supporting the developing bud; usually green


Capitate Stalk -Botany - forming a head like mass or dense cluster, as the flowers of plants in the composite family. Enlarged and globular at the tip.


Clone - An organism descended asexually from a single ancestor, such as a plant produced by layering or a polyp produced by budding.


Dominant - Of, relating to, or being an allele that produces the same phenotypic effect whether inherited with a homozygous or heterozygous allele. said of an allele which by itself alone will produce a particular phenotype regardless of which other allele may be present on the other matching chromosome of the diploid pair; thus it takes only one copy of the chromosome to cause a dominant trait to be expressed in the phenotype.


Genome - the total genetic information possessed by an individual, a breed or a species.


Genotype - the invisible genetic makeup of an individual organism, which includes alleles which may be recessive and therefore have no visible physical expression.


Homozygous - An individual possessing (receiving from parents) identical alleles for a trait is said to be homozygous or pure for that trait, e.g. plant with RR alleles is homozygous for the seed shape. A homozygous always breeds true for that trait.


Hybrid - A strain made up of two genetically unknown parents.(not really a strain)



Inbred Backcrossed Line - (IBL) - A line produced by at least five generations of sequential inbreeding, self fertilization or backcrossing accompanied by selection within and between lines so that the individuals are considered to be homozygous, or nearly so. is a genetically homogeneous strain that grows uniformly from seed. An IBL is homozygous, or true breeding for particular traits. Not the same as Land Based Species (originals).


Off-spring - The progeny or descendants of a plant considered as a group.


Out-cross - A female crossed with a male with the soul intention of inbreeding the sibling line to the mother plant.


Phenotype - The external (morphological) appearance of an individual for any trait or traits is called the phenotype, e.g. for seeds, round shape or wrinkled shape is the phenotype The observable, qualifiable and quantifiable representation of a trait.


Pistil - The female, ovule-bearing organ of a flower, including the stigma, style, and ovary.


Pistolate – Female


Pollen - The fine powder like material consisting of pollen grains that is produced by the anthers of seed plants.


Potency - The quality or state of being potent. strength/efficacy/effectiveness


Recessive - Tending to go backward or recede. Of or relating to a trait that is expressed only when the determining allele is present in the homozygous condition.


Resin - Trichomes come in three different types, Bulbous, Capitate-Sessile and Capitate-Stalked.


Stamens - The pollen-producing reproductive organ of a flower, usually consisting of a filament and an anther. Staminate – Male


THC - Delta-9-tetrahydrocannabinol & delta-8-tetrahydrocannabinol - THC mimics the action of anandamide, a neurotransmitter produced naturally in the body, which binds with the cannabinoid receptors in the brain to produce the ‘high’ associated with marijuana. THC possesses high UV-B (280-315 nm) absorption properties.


Trait - A genetically determined characteristic or condition: a recessive trait.


Trichomes - Cannabis resin glands.

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