晋北区芥菜型油菜抗旱性鉴定及综合抗旱指标筛选

为系统评价芥菜型油菜（Brassica juncea L.）的抗旱性，筛选合理的油菜抗旱指标，以12份芥菜型油菜为材料，采用大田干旱胁迫鉴定法，分析了干旱胁迫对油菜花期光合生理参数、农艺性状等指标的影响，同时结合隶属函数和主成分分析法对芥菜型油菜抗旱性进行分类和综合评价。结果表明：晋油14号、神池大黄芥、牛尾稍和晋油13号属于抗旱型品种。利用主成分分析法将干旱胁迫12个单项指标综合成为4个相互独立的综合指标。光合参数（37.33%）、产量因子（21.31%）、蒸腾速率（17.42%）和千粒重（11.10%）与油菜抗旱性关系密切。研究结果可为晋北区芥菜型春油菜抗旱品种的筛选及旱作栽培提供参考。

Drought Resistance Identification and Comprehensive Drought Resistance Index Screening of Rapeseed（Brassica juncea L.）in North Shanxi#br#

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.