In China grain hybrid sorghum,there are two kinds of cytoplasm types A₁ and A₂ applied in production and less applied in two-line.The cell nucleus of male sterile line includes the Kafir nuclear system,the Kaoliang nuclear system,trend Kafir nuclear system and the Shallu nuclear system.The germplasm of r-line mainly belongs to the Kaoliang type and trend Kaoliang type.The used models of heterosis mainly are the Kafir×Kaoliang,the Kaoliang×Kaoliang,trend Kafir×trend Kaoliang,the Shallu×trend Kaoliang.As the plant height changed from high to middle,crop yield increased a lot.The main factor influenced fertility is temperature.The pistil of A₁-CMS has no abortion when the temperature is low and sunlight is short.The pistil of A₂-CMS has little abortion and the stamen can shed pollen with high temperature which make a little self-seed.The hybrid sorghum plant has highly height,plant type is not ideal,and resistance should be improved.