苗球兼用型大白菜新品种早熟8号的选育

早熟8号是由自交不亲和系10383和116-3配制而成的苗、球兼用型早熟大白菜一代杂种。作结球白菜栽培，生长期55～60 d（天），株高32 cm，开展度55 cm；外叶绿色，叶柄白色，叶面无毛；叶球矮桩叠抱，白色，球高26 cm，横径18 cm，球形指数1.4；单株净质量1.0～1.5 kg，每667 m²净菜产量3 000～4 000 kg，净菜率70 %左右。作小白菜栽培，叶片圆形，绿色，色泽光亮，叶面无毛，叶柄宽扁，白色；生长迅速，30 d（天）左右就可以采收上市。对霜霉病、病毒病及软腐病的抗性强于对照早熟5号，适应性广，品质较好，适宜浙江省及类似气候地区种植。

A New Chinese Cabbage F1 Hybrid——'Zaoshu No.8'

‘Zaoshu No.8’is a new Chinese cabbage F₁ hybrid.It can also be used as pakchoi and Chinese cabbage.It is developed by crossing two self incompatible lines 10383 with 116-3.It is early maturity and cultivated as Chinese cabbage.Its growth period is 55-60 days.The plant is 32 cm in height，55 cm in width.Its leaf head is 26 cm in height，18 cm in diameter.The head shape index is 1.4.Its average head weight is 1.0-1.5 kg.The net yield is 45-60 t·hm^-2.Its net head rate is 70 %.Used as pakchoi，it grows fast and can be harvested in nearly 30 days.It has stronger resistance to downy mildew，virus and soft rot than‘Zaoshu No.5’.It has strong adaptability and good quality.It is suitable for cultivation in Zhejiang Province and other regions with similar climate conditions.