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Acta Horticulturae Sinica ›› 2025, Vol. 52 ›› Issue (6): 1588-1598.doi: 10.16420/j.issn.0513-353x.2024-0895

• Cultivation?Physiology & Biochemistry • Previous Articles     Next Articles

Response of Premature Bolting of Carrots Under Different Low Temperature and Day Length

YAN Lijuan1,2, OU Chenggang1, LIANG Chen1, HU Tiankuo1, LIU Xing1, YANG Jing2, LIN Guocang2, and ZHUANG Feiyun1,2,*()   

  1. 1 State Key Laboratory of Vegetable Biobreeding,Institute of Vegetables and Flowers,Chinese Academy of Agricultural Science,Beijing 100081,China
    2 Comprehensive Experiment Field,Xinjiang Academy of Agricultural Sciences,Urumqi 830000,China
  • Received:2024-11-29 Revised:2025-05-06 Online:2025-06-20 Published:2025-06-20
  • Contact: and ZHUANG Feiyun

Abstract:

Premature bolting of carrot has become a common problem in winter-spring shed and early spring field cultivation,but the responses of different genotypes to low temperature and day length were still unclear. In this study,premature bolting ratios of two types of carrot male sterile lines,self-pollinated lines and their crosses were investigated under different ecological conditions in Beijing,Inner Mongolia,Anhui,Henan,and Xinjiang. The results showed that the orange male sterile lines,self-pollinated lines exhibited tolerant to bolting under both low temperature and long day,and their crosses showed tolerant under low temperature,but most bolted under long day. The red male sterile lines,self-pollinated lines and their crosses were prone to bolting under low temperature but not under long day, and bolting ratios were improved with low temperature intensity during the seedling stage. Further analysis through a genetic model showed that premature bolting ratios of crosses were mainly affected by additive × environment and dominance × environment interactions,with no significant by additive or dominance effects. This indicated that the premature bolting alleles were greatly influenced by environmental factors,but no significant by genes interaction.

Key words: carrot, premature bolting, low temperature, day length, genetic effects