Cannapedia Encyclopedia of cannabis strains

Backcrossing (BX)

Backcrossing is a method of crossbreeding cannabis which allows for a desired feature to pass from the mother plant to the offspring.

Backcrossing differs from traditional methods of crossbreeding, as it involves only a single mother plant and one offshoot. This type of crossbreeding produces a hybrid offshoot which is genetically very similar to its parent. In an ideal case, the offshoot carries two files of the desired genes of the mother plant. Backcrossing allows growers to secure the features they want and to pass them to successive generations.


Why backcrossing?

Backcrossing is often abbreviated as BX. “B” stands for “back” and “X” for “cross” or “crossing”. When breeders like certain features in one strain, backcrossing can help them to preserve these features within given variety.

Backcrossing can also be overdone, however. If a plant is being crossbred too often, it may cause negative recessive genes to appear in the offspring. Backcrossing should be therefore performed only once or twice.

When backcrossing, the best male plant (instead of female) is usually selected to be backcrossed with the mother plant. Before the crossbreed gains the desired consistent features, it generally takes four to five generations of crossbreeding. At that point, the male and female stabilized crossbreed can be crossed, producing a new crossbreed.

Zpětné křížení (BX)