LIU Mengmeng，CUI Xiangyun，LI Wenjie，LI Mingxuan，CHENG Qing，SHEN Huolin*
（College of Horticulture，China Agricultural University，Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops，Beijing 100193，China）
Abstract：In order to preliminarily definite the heterosis expression in single plant weight，correlated traits，and nutritional quality characters，to screen out heterosis combinations with advantages，and provide theoretical basis for utilizing celery heterosis，this study took 35 male sterile lines of celery as female parents
and its maintainer and 16 inbred lines as male parents；created 158 single cross hybrids and 29 three cross hybrids；and then investigated and analyzed the heterosis expressions in each trait of parents and hybrid combinations．The results showed that among the 158 single cross hybrids，the variation of over-parent heterosis in single plant weight was -53.8%-78.3% with -7.2% average value，and positive advantage rate was 31.6%．Besides，14 high-yielding combinations and 8 high-quality combinations were screened out．Among the 29 three cross hybrids，there were 41.4% and 86.2% combinations with single plant weight positively exceeding their parents and with superstandards advantage．7 high-yielding combinations were screened out，indicating three cross hybrid had certain utilization value and development prospect in celery heterosis．
