The Cytomorphology Study of Pollen Abortion in Pingxiang Dominant Genic Male Sterile Rice(PXDGMSR) Study on the Floral characteristics Characteristics and Sstructure in Two Types of Male Sterile Lines of Bbroccoli(Brassica oleracea var.italica) Effect of Different Pruning Methods on Flowering and Fruiting Characteristics Between Different Types of Male Sterile Lines in Broccoli Seed Plants Effect of Different Pruning Methods on Flowering and Fruiting Characteristics Between Different Types of Male Sterile Lines in Broccoli Seed Plants The Floral and Seed Setting Characteristics in Two Types of Male Sterile Lines of Cabbage(Brassica oleracea L. var. capitata) New Restorer Lines and Genetic Analysis of Pingxiang Dominant Genic Male Sterile Rice