| Eight traits indices were used for the evaluation of drought resistance of alfalfa germplasms in green house during seedling stage under repeated drought stress.Through principal components analysis,five indices,leaf length,leaf width,root/shoot stress index,underground biomass stress index and dry weight content stress index,were screened,which had close relation to the survival rates under repeated drought condition during seedling stage.With the membership function method,the drought resistance of 21 accessions of alfalfa germplasms was evaluated.Based on the value of comprehensive evaluation,the germplasms with stronger drought resistance in seeding stage were:ZXY04P-44,ZXY04P-10 and ZXY04P-32. |