Breeding of broccoli new variety Ruiqing No. 8.

Cauliflower male sterile line CMS034 used as sterile source was crossed and backcrossed by broccoli inbred line 0512 with excellent stability for several successive generations,and broccoli cytoplasmic male sterile line CMS0512 with stable sterility and good economic traits was bred.Then,CMS0512(female parent) was hybridized by good broccoli inbred line 038(male parent),finally the broccoli hybrid Ruiqing No.8 was bred.The plant height of Ruiqing No.8 is about 60 cm,and its plant breadth is about 65 cm with green and glossy leaves.The ball-flower is semi-circular and close with the horizontal diameter of about 17.5 cm and vertical diameter of about 14 cm,and it has small bud granulocyte,dark green color,and fine flower stems without hollow.Its single ball-flower is about 0.55 kg in weight,and its yield is about 1400 kg/667 m2.Ruiqing No.8 belongs to middle-early maturing variety,and it can be harvested about 72 d after transplanting.This variety has 2~4 axillary buds.After the harvest of main ball-flower,the lateral ball-flowers can be picked continuously for 1~2 times.Ruiqing No.8 has strong growth potential,high uniformity,strong adversity resistance,and resistance to downy mildew and black rot.