Abstract: Minihuang No.5 is a new baby Chinese cabbage（Brassica campestris L. ssp. pekinensis） F₁ hybrid, which was developed with male sterile line CCR11268（BC₉ generation） as female parent and self incompatible line CM12081 as male parent. Its growing period is 75~90 days. The plant has strong growth vigor and compact type. Its outer leaves are dark green in color,and inner leaves are golden yellow in color. The plant is 31.2 cm in height and 54 cm in width. Its head is 22 cm in height and 10.5~11.3 cm in diameter. The spherical indes is 1.9, and net-head rate is 69.5%. Its net vegetable yield is abou 72 757.5 kg/hm². The soluble sugar content is 2.31% and VC content is 221 mg/kg. It has the characteristics of strong bolting resistance, higt yield, high stability and excellent quality. It is suitable for planting in Yunnan province and similar ecological areas.

Key words: Chinese cabbage（Brassica campestris L. ssp. pekinensis）, Minihuang No.5, F₁ hybrid, breeding