Comprehensive evaluation of drought resistance of 39 Bromus inermis germplasms at the seedling stage

In the greenhouse, A trial was conducted to comprehensively evaluate the drought resistance of 39 Bromus inermis germplasms introduced from abroad at the seedling stage by measuring the average survival rate, plant height, number of green leaves, aboveground biomass, underground biomass, root/shoot ratio. The results of this study showed that 39 B. inermis germplasms were classified into three groups with the different drought resistance, in which 16 germplasms were stronger and medium drought resistance, respectively, and 7 germplasms were weaker drought resistance. The membership function method was used to calculate the weight value of average survival rate, plant height, number of green leaves, aboveground biomass, underground biomass, and root/shoot ratio for each B.inermis germplasm, and then calculated the comprehensive evaluation value (D). The comprehensive evaluation value (D) suggested that ZXY05P0854 was the strongest drought resistant germplsm at seeding stage and ZXY05P1135 was the weakest at seeding stage.