Eight wild Kentucky bluegrass populations from different areas in Gansu and one commercial cultivar ‘MidnightⅡ’ were used to study their apomictic frequency and poly-embryo rate by using Paraffin sectioning technique and paper germination method.The results indicated that the poly-embryo rate ranged from 0% to 15.29%,the highest was from Longnan and the lowest was from Gannan.The highest apomictic occurrence frequency was from Longnan (71.04%),and the lowest was from Gannan (11.2%),and the rest ranged from 32% to 58%.Correlation analysis showed that there was a significant correlation between apomictic frequency and poly-embryo rate (R2=0.96).breeding of Kentucky bluegrass.