Abstract: In order to study the selection patterns of combinationswith strong heterosis, the using value of 7 parents and the heritablity of 7 characters for hybrid fragrant-lowered garlic, bymeans of analysis method of Griffing complete diallel cross, the heterosis and combining ablity analysiswere made for 42 hybrid combinations. The results show that: (1) There are all certain heterosis in 7 characters. The order of heterosis over mid-parent is sheath length and leaf number > leaf length > plant height >mass per plant > leaf width > diameter of sheath; The order of the heterosis over high-parent is leaf number > sheath length and leaf length > plant height > leaf width and mass per plant > diameter of sheath. ( 2) Tianjin Dajingou, Shandong Daqinggen, Guilinjiu and Chongqing Dajiucai have a better combinig ability. They are perfect parent materials, and their uses should be attached great importance to in future breeding. (3) Plant height, leaf length, leaf width, leaf number and mass per plant all have a recip rocal effect which is significance extremely. Among them, plant height, leaf length and mass per plant have a very obvious maternal effect. (4) Plant height, leaf length and mass per plant are mainly dominated by additive genes and cytop lasmic genes, sheath length by additive genes, leaf width, diameter of sheath, and leaf number by both addtional genes and no addtional genes (dominance genes or epistatic genes).

Key words: Fragrant-flowered garlic, Combining ability, Genetic analysis