Abstract:

Abstract:The natural doubled effect of maize haploid in different sowing was studied in this research;The results showed that there was big difference with different genotype of haploid in natural pollinating rate;The average natural pollinating rate of haploid was 6.56%～65.33%;The natural pollinating rate in summer sowing was 3.77% higher than in spring sowing,self-fertility rate was 6.23%～9.39%,and the self-fertility rate of haploid in summer sowing was 2.37% higher than spring sowing;Summer sowing was better for the natural pollen dispenser and self-fertility.