Abstract:Pollen and seed fertility data of nine P (T) GMS and the two control sterile lines(Pei’ai 64S, ZAU11S ) were analyzed based on AMMI model, linear regression model and hierarchical cluster analysis under the nine sowing dates. The Biplot of this AMMI analysis showed clearly the interactive pattern between the genotypes and the sowing dates. According to their IPCA1 value and mean pollen fertility, the male-sterile lines could be divided into three groups. The first group[Pei‘ai 64S(1),ZU21S(10) and ZU22S (11)] had the lower mean pollen fertility and the higher IPCA1(the largest Interaction Principle Components Axis) value, indicating quietly sensitive to the temperature change, and the great negative effect. The second group which in volved ZAU11S(2),ZU4S(3),ZU5S(4),... ...