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Comprehensive Evaluation and Screening for Drought Resistance of Carotenoid-Rich Foxtail Millet Using the Fuzzy Membership Function Method

• 1、college of science life,shanxi normal university,shanxi taiyuan 030000
• 2、shanxi urban and rural revitalization research institute Co.,Ltd,shanxi yuncheng 044000

Abstract：Drought stress is a major factor affecting millet yield and poses a serious threat to food security in China. The exploration of drought-tolerant genes in millet provides a basis for improving millet\'s drought tolerance and reducing the impact of drought on millet. In this study, 62 millet varieties were first divided into five drought resistance grades based on their survival rates under drought conditions. Subsequently, to screen drought-resistant nutrient-rich varieties, varieties with high carotenoid or folate content were selected from each drought resistance grade. Further, simulated drought experiments at the seedling stage and potted drought experiments at the jointing stage of millet were conducted. The drought resistance of five millet varieties was evaluated by comprehensively considering multiple indicators such as antioxidant enzymes, osmotic adjustment substances, and water loss rate of detached leaves using the fuzzy mathematics membership function method. One variety with high folate or carotenoid content was selected from each drought resistance grade, and finally nutrient-rich varieties such as Heizhigu, Chaoxin 201, Qinzhouhuang, Baimigu, and Yesuangu were selected. Subsequently, the drought resistance of millet at the jointing stage was evaluated from three aspects: water loss rate of detached leaves, antioxidant enzyme system, and osmotic adjustment substances. Finally, the fuzzy mathematics model membership function method was used to comprehensively evaluate the drought resistance of the five nutrient-rich millet varieties.

Keywords： Drought Millet Antioxidant Enzymes