“辽白21号”为中晚熟大白菜品种,生长期81d左右。亲本‘S7-1’和‘S7-2’为大白菜品种“青帮河头”和“天津青麻叶”分别经多代自交分离选育而成的高代自交不亲和系。该品种生长势强,群体植株整齐度高。外叶深绿,叶柄绿色。叶球为长筒舒心形,株高49.6cm,开展度59.0cm,球高41.2cm,球横径14.6cm,单株叶球重3.5kg,净菜率高达84.6%。经人工接种鉴定抗霜霉病和软腐病,高抗病毒病;每667m2产量8 540.00kg左右。适于辽宁省各地及山东、河北、吉林等省栽培。 “Liao Bai 21 ” is a medium-late-ripe Chinese cabbage varieties, growth period of about 81d. The parents ’S7-1’ and ’S7-2’ were the high generation self-incompatibility of Chinese cabbage cultivars “Qingbangheheitou” and " And Department. The variety is growing strong, high uniformity of plant groups. Dark green leaves, petiole green. Leaves for the long sleeve Shu heart shape, height 49.6cm, the degree of 59.0cm, the ball 41.2cm high, the ball diameter 14.6cm, single leaf weight 3.5kg, net food rate as high as 84.6%. Anti-downy mildew and soft rot disease were identified by artificial inoculation. High anti-virus disease was found. The yield was 8 540.00kg per 667m2. Suitable for all parts of Liaoning Province and Shandong, Hebei, Jilin and other provinces cultivation.