Abstract: To fully understand the genetic relationship among garlic resources in Hubei province and thier allicin content,the genetic diversity of 38 garlic resources were conducted in the present study,the agronomic characters and the allicin content were analyzed. The results showed that the morphological diversity was high among accessions assessed. The main height of pseudo-stem variation was clover number（46.5%）,followed by garlic-scape weight（43.91%）,thick of bulb plate （40.48%） and bulbs weight（39.28%）. The index of genetic diversity of the agronomic traits of quantitative characteristics was higher than qualitative character,and the largest one was plant height（2.05）. Based on cluster analysis of agronomic traits and principal components analysis,38 garlic resources in Hubei were divided into two groups,and each group had its respective character. Agronomic traits and the allicin content were analyzed by principal component analysis,the main three factors were constituted by vegetative growth,yield components and nutritional quality,the contribution rate was 80.913%. Multiple factors comprehensive by the production of garlic and allicin content was evaluated,nine breeding materials were selected.

Key words: garlic（allium sativum l.）, agronomic traits, allicin, cluster analysis