(1.Tianjin Kernel Vegetable Research Institute/State Key Laboratory of Vegetable Germplasm Innovation/Tianjin Enterprise Key Laboratory of Vegetable Genetic Breeding，Tianjin 300381；2.Institute of Vegetables，Tianjin Academy of Agricultural Sciences，Tianjin 300384)
‘Sujun 90’ is a new non-heading Chinese cabbage F1 Hybrid that was bred through hybridization between two self-incompatible lines ‘KR08-1’ and ‘Y-3’.The plant grows fast with erect petioles,early-maturing，high quality and yield.It can be harvested about 30 days after sowing in autumn，and the yield is about 3 700 kg per 667 m2.The smooth leaves are light green in color with little wax powder and fiber.The petioles are bright green.This variety is very resistant to downy mildew，virus disease and soft rot.The size of plant is about 22 cm in height and 24 cm in expansion diameter.The appropriate increase of planting density to 8 cm×15 cm spacing is suggested for ‘Sujun 90’.It has wide adaptability all over the country for spring and autumn cultivation.This variety is suitable for planting in open field in the south of the Yangtze River and in protecting field in the north China in winter and spring.