Achieve a high level of knowledge about the inheritance as cannabis works. Its special characteristics, the less pure are the kindreds involved in the crossing is more complex to predict the outcome, so always make sure that work with little or no hybridized lines and improve before starting the breeding project. If you do not have them, work is complicated too much.
You can make a basic selection from observing the phenotype or morphology of the plant and statistics to demonstrate whether or not the desired throughout the general population of individuals grown characters. We must learn to recognize these characters when they occur, but also when they cease to do so or when they appear mixed or "camouflaged" with others. Another problem arises from the fact that most of the alleles are affected by more than one gene, whose activation or latency can alter the expression of all characters that depend to some extent on it.
Genotype and Phenotype
As an example: the ripening time. This is a little considered factor in the cultivation of narcotic cannabis, always giving full importance to flowering time and even confusing these two processes are actually different. Cannabis, maturation begins after a certain period of bloom in the reproductive system of the plant begins to stop working, the female has been fertilized or not. If fertilization, the effect is clearly visible because while the embryos start their growth is observed as the production of new brake sexual organ is pollinated and if you have more than 70% of the female stops completely.

