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Screening and Physiological Responses of Maize Inbred Lines to Drought Stress in South China

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  • Zhiqin Zhang

    (Guangxi Key Laboratory of Agro-Environment and Agro-Products Safety, Key Laboratory of Crop Cultivation and Physiology, College of Agriculture, Guangxi University, Nanning 530004, China)

  • Xiaodong Xie

    (Maize Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China)

  • Muhammad Asad Naseer

    (Guangxi Key Laboratory of Agro-Environment and Agro-Products Safety, Key Laboratory of Crop Cultivation and Physiology, College of Agriculture, Guangxi University, Nanning 530004, China)

  • Haiyu Zhou

    (Maize Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China)

  • Weidong Cheng

    (Maize Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China)

  • Hexia Xie

    (Maize Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China)

  • Lanqiu Qin

    (Maize Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China)

  • Xiang Yang

    (Maize Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China)

  • Yufeng Jiang

    (Maize Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China)

  • Xunbo Zhou

    (Guangxi Key Laboratory of Agro-Environment and Agro-Products Safety, Key Laboratory of Crop Cultivation and Physiology, College of Agriculture, Guangxi University, Nanning 530004, China)

Abstract

The frequent occurrence of localized and seasonal droughts has caused severe economic losses in maize production in South China. To promote sustainable maize production, selecting and breeding drought-tolerant varieties is vital for addressing water scarcity. Drought stress affects all aspects of crop morphological performance. In this study, the morphological performance of 285 maize inbred lines under drought stress was investigated using D-value analysis, correlation analysis, principal component analysis, cluster analysis and stepwise regression analysis. All indicators were significantly different in the regular treatment compared to the drought treatment. Specifically, survival rate, root fresh weight, root dry weight, plant dry weight, root/crown ratio, and plant fresh weight were used as indicators for drought-tolerance evaluation. Furthermore, the drought-tolerant inbred line CML323 and the drought-sensitive inbred line CB2-49-1 were screened by comprehensively evaluating D values. The drought-tolerant inbred line CML323 exhibits higher leaf relative water content, chlorophyll content, proline content, and ascorbate peroxidase and peroxidase activity while having lower malondialdehyde content, consequently demonstrating excellent drought tolerance. This study provides valuable insights into drought-tolerance indicators and reference materials for breeding maize varieties.

Suggested Citation

  • Zhiqin Zhang & Xiaodong Xie & Muhammad Asad Naseer & Haiyu Zhou & Weidong Cheng & Hexia Xie & Lanqiu Qin & Xiang Yang & Yufeng Jiang & Xunbo Zhou, 2024. "Screening and Physiological Responses of Maize Inbred Lines to Drought Stress in South China," Sustainability, MDPI, vol. 16(17), pages 1-16, August.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:17:p:7366-:d:1464934
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    References listed on IDEAS

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    1. Gheysari, Mahdi & Mirlatifi, Seyed Majid & Bannayan, Mohammad & Homaee, Mehdi & Hoogenboom, Gerrit, 2009. "Interaction of water and nitrogen on maize grown for silage," Agricultural Water Management, Elsevier, vol. 96(5), pages 809-821, May.
    2. Liao, Qi & Ding, Risheng & Du, Taisheng & Kang, Shaozhong & Tong, Ling & Li, Sien, 2022. "Stomatal conductance drives variations of yield and water use of maize under water and nitrogen stress," Agricultural Water Management, Elsevier, vol. 268(C).
    3. Jing, Lanshu & Weng, Baisha & Yan, Denghua & Yuan, Fei & Zhang, Shanjun & Bi, Wuxia & Yan, Siying, 2023. "Assessment of resilience in maize suitable planting areas under drought stress," Agricultural Water Management, Elsevier, vol. 277(C).
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