Effect Of Waterlogging On Growth Of 43 Canola Germplasms.

Canola is an important oilseed crop with high level of protein and unsaturated fatty acid. One of the common problems in canola production is waterlogging. This experiment was conducted to screen waterlogging tolerance of 43 canola germplasms. Canola plants were germinated in a greenhouse and subjected to well-drained (control) or waterlogging (water level kept to the soil surface) conditions one month after germination. Data were recorded on shoot and root dry weigt (SDW and RDW) and root to shoot ratio (R/S) after 2-wk of stress exposure. An interaction between waterlogging and canola germplasm was observed in all the parameters. There were large variations in SDW and RDW in the germplasms under the well-drained condition, but not in the R/S. In contrast, the germplams varied in SDW and R/S, but not in RDW under waterlogging. Only nine of the 43 germplasms showed reduced growth under waterlogging. Such results indicated high waterlogging tolerance in the canola germplasms.