关键词: 芥菜型春油菜, 抗旱性, 隶属函数法, 主成分分析法, 抗旱评价

Abstract: To systematically evaluate drought resistance of rapeseed （Brassica juncea L.）and select reasonable drought resistance indexes, taking 12 mustard rapes as material and using field drought stress assay method, this paper analyzed the effects of drought stress on the photosynthetic physiological parameters and agronomic traits during flowering stage, and combined with subordinate function analysis and principal component analysis for comprehensive evaluation. The results showed that: Jinyou 14, Shenchi rape, Niuwei shao and Jinyou 13 were drought-resist varieties. Principal component analysis was used to synthesize 12 single indicators of drought stress into 4 independent comprehensive indicators. Photosynthetic parameters (37.33%), yield factors (21.31%), transpiration rate (17.42%) and 1 000-seed weight (11.10%) were closely related to drought resistance of rapeseed. The results could provide reference for the selection and cultivation of drought resistant spring rapeseed in northern Shanxi Province.

Key words: Brassica juncea L., drought tolerance, subordinate function analysis, principal component analysis, comprehensive evaluation