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| Study of Premature Bolting of Carrot in Spring Cultivation |
| BAO Sheng-you1,2,OU Cheng-gang2,ZHUANG Fei-yun2*,CHEN Jin-feng1,ZHAO Zhi-wei2 |
| 1State Key Laboratory of Crop Genetics and Germplasm Enhancement,College of Horticulture,Nanjing Agricultural University,Nanjing 210095,Jiangsu,China;2Institute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences,Beijing 100081,China |
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Abstract The premature bolting of carrot（Daucus carota L.var.Stiva DC.）in spring cultivation was investigated with 101 accessions including five ecotypes in 2004,2005 and 2008.The results showed that the premature bolting ratio of 37 accessions of Danvers,Nantes,Amsterdam and Kuroda were zero,and the ratio of one Nantes,one Kuroda and three purple accessions were more than 20 %.The average ratio of purple type was about 48.4 %,which was significantly higher than other ecotypes.The average ratio of 2004 was 7.0 %,which was significantly higher than that of 2005(2.7 %)and 2008(3.7 %).The premature bolting of carrot could be induced by long-day.
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Received: 02 September 2009
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Corresponding Authors:
ZHUANG Fei-yun
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