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| A New Mini Chinese Cabbage F1 Hybrid—‘Jingchunwa No.4’ |
| YU Yang-jun，ZHANG Feng-lan，ZHANG De-shuang，ZHAO Xiu-yun，YU Shuan-cang，WANG Wei-hong，SU Tong-bing，LI Pei-rong |
| Vegetable Research Center，Beijing Academy of Agriculture and Forestry Science，Beijing 100097，China |
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Abstract ‘Jingchunwa No.4’is a new mini Chinese cabbage F1 hybrid bred by crossing self imcompatible line‘07QX4B’with‘0841’．It is of early maturity and takes about 55-60 days from sowing to harvest．Its plant type is shorter．The outer leaf is dark green in color with light green petiole．Its head is of cylindrical shape and flat-topped with 22-23 cm head height and 13-14 cm diameter．Its inner leaves section is deep yellow in color．The average single head weight is about 1.4 kg．It can yield about 75 t · hm-2．Its tolerance to bolting is strong．In fields，its resistance to verticillium wilt is stronger than that of the contrasts‘Chunyuehuang’，‘Linglonghuang 012’and‘Naihanjinhuanghou’．It tastes sweet and crisp．It is suitable to be planted as larger head of mini Chinese cabbage．It can be planted 90 000 plants · hm-2．It is suitable to be planted in spring and autumn in Beijing and Yunnan，and in summer on highland（800-1 800 m above sea level）of Zhangjiakou of Hebei，Gansu and Yunnan．
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Received: 21 February 2020
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