Genetic Oiferentiation of Cultivars of Garlic Using Measuring Multivariate DistancesMeasuring the similarities between biological population groups has always been one of the principal problems of natural sciences. However, with the development in recent decades of our knowledge of the genetic variation basis, and improvements in computer capabilities, it has been possible to know the degree of diversification between individual populations and groups of populations. In this research by application of multivariate analysis it was posible to find the Mahalanobis 02 values that let to estimate the gene tic divergence into cultivars of a colombian collection of garlic. The results showed the formulation of three genetic groups, one of them is conformed by genotypes with bulbs almost always unprotected from their sheated tunics, the other groups are composed by covered bulbs and are different with each other, not only in its bulbs size, but also height of plant, and illness reactions. The diversity colletion helps very much in the cultivars improvement.