Abstract：To clear the genetic pattern of primary umbel types in carrot（Daucus carota L. var. sativa DC.），the umbel type，morphology characteristics and corresponding seed umbel type，seed yield and quality trait of 7 conventional carrot varieties were investigated and analyzed. The results showed that bell umbels accounted for the most，semi-bell was second，and flat umbels took minimum percentage during flowering in these 7 carrot varieties. Total floret number and umbels area of bell type were significantly higher than that of other types. After pollination，bell umbels formed flat seed umbels mostly，while those with flat shape flowers produced mostly closed type of seed umbels. Semi-bell shape always formed flat type and cup type seed umbels. Comparing yield and quality of these 3 types of seed umbels，various indexes of flat type were better than the closed type and cup type. The yield of single flat type seed umbels was the highest，its seed size was the biggest and full，germination percentage and germination energy were maximum，and its EC was minimum.
