Screening and Identification of Waterlogging Tolerant Rapeseed (Brassica Napus L) During Germination Stage

摘要

To develop a suitable screening criterion of water logging tolerant varieties, germination rate, radical length, hypocotyl length and seedling fresh weight were investigated for 50 rapeseed varieties under water logging. The results revealed radical length, hypocotyl length and seedling fresh weight were significantly reduced under water logging. Germination rate was relatively insensitive compared to the other three traits and was not a continuous distribution. Water logging tolerance index combining seed germination rate and the other 3 index was significantly related with all the traits evaluated. Therefore, the water logging tolerance index could be used as a screening tool for selecting the tolerant varieties.