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| A Late Maturing New Chinese Cabbage F1 Hybrid —‘Jingqiu No. 4’ |
| ZHANG Feng-lan，ZHANG De-shuang，YU Yang-jun，XU Jia-bing，ZHAO Xiu-yun，YU Shuancang，WANG Wei-hong，LU Gui-xiang |
| Beijing Academy of Agriculture and Forestry Science，Beijing Vegetable Research Center，Beijing 100097，China |
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Abstract ‘Jingqiu No. 4’is a late maturing Chinese cabbage F1 hybrid with high quality．It can be harvested in 75-80 days after sowing．It has high uniformity．Its exterior leaf is dark green in color．The leaf blades are slightly wrinkled with smaller openness．The single head weight is about 4.2 kg．It tastes good and has super quality．It is resistant to virus diseases，downy mildew and black rot．Its yield is about 105.0 t·hm-2．It has wide adaptability and is suitable to be cultivated in B eijing，Hebei，Tianjin，Liaoning，Jilin，Heilongjiang，Inner Mongolia and Shandong Provinces．The accumulated extension areas is about 20 000 hm 2．
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Received: 12 March 2013
Published: 16 April 2013
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