eventually maybe, they would have to first create a genetic database from confirmed samples of each strain(they would also have to include which breeder the strain came from as many different breeders will have a strain they all call by the same name and may have come from the same or similar genetic backgrounds, but the differing preferences and methods used in selective breeding by many different breeders will result in plants with different genetic makeup and dominant traits. many times, from one breeder to the next, the same "strain" from one breeder will have completely different charactaristics(growth pattern, potency, maturation rate, etc)than the next, sometimes completely breeding out a genetic trait that another breeder may have preferred and thus bred their "version" of the same strain specifically for that trait.) Even then because of crossbreeding different strains from different parts of the world(which has resulted in the majority of cannabis consumed these days), and the genetic variables within each strain(most are not fully stabilized) with current technology they could only be able to determine that any particular plant is closely related to a particular strain but could 100%for sure identify the strain(again the inability is mainly due to a great number of genetic variables within each strain due to the reasons mentioned above)