Drought stress in autumn, winter and spring has endangered the production and quality of rapeseed in China. The objective of the study was to evaluate drought resistance of the rapeseed (Brassica napus L.) DH (doubled haploid) population and screen the most drought-resistant DH lines. For phenotyping, the rapeseed lines from DH population [(Huyou 15×5900) F4×(No2127-17×275B) F4] were grown in plastic pots. Six traits including plant height, root length, shoot dry weight (SDW), root dry weight (RDW), root/sh...