| Drought tolerance evaluation of 16 maize inbred lines throughout the whole growth period |
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| DOI：10.7606/j.issn.1000-7601.2023.03.13 |
| Key Words: maize inbred lines drought resistance anthesis silking interval |
| Author Name | Affiliation | | LI Yipu | Agronomy Academy, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China
Key Laboratory of Crop Cultivation and Genetic Improvement of Inner Mongolia, Hohhot, Inner Mongolia 010018, China | | SU Zhijun | Agronomy Academy, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China
Key Laboratory of Crop Cultivation and Genetic Improvement of Inner Mongolia, Hohhot, Inner Mongolia 010018, China | | GAO Julin | Agronomy Academy, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China
Key Laboratory of Crop Cultivation and Genetic Improvement of Inner Mongolia, Hohhot, Inner Mongolia 010018, China | | YU Xiaofang | Agronomy Academy, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China
Key Laboratory of Crop Cultivation and Genetic Improvement of Inner Mongolia, Hohhot, Inner Mongolia 010018, China | | WANG Fugui | Key Laboratory of Crop Cultivation and Genetic Improvement of Inner Mongolia, Hohhot, Inner Mongolia 010018, China
Vocational and Technical College of Inner Mongolia Agricultural University, Baotou, Inner Mongolia 014109, China | | LIU Jian | Key Laboratory of Crop Cultivation and Genetic Improvement of Inner Mongolia, Hohhot, Inner Mongolia 010018, China
Vocational and Technical College of Inner Mongolia Agricultural University, Baotou, Inner Mongolia 014109, China | | SUN Jiying | Agronomy Academy, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China
Key Laboratory of Crop Cultivation and Genetic Improvement of Inner Mongolia, Hohhot, Inner Mongolia 010018, China | | WANG Zhigang | Agronomy Academy, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China
Key Laboratory of Crop Cultivation and Genetic Improvement of Inner Mongolia, Hohhot, Inner Mongolia 010018, China | | HU Shuping | Key Laboratory of Crop Cultivation and Genetic Improvement of Inner Mongolia, Hohhot, Inner Mongolia 010018, China
Vocational and Technical College of Inner Mongolia Agricultural University, Baotou, Inner Mongolia 014109, China | | BAO Haizhu | Agronomy Academy, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China
Key Laboratory of Crop Cultivation and Genetic Improvement of Inner Mongolia, Hohhot, Inner Mongolia 010018, China |
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| Abstract: |
| To explore the characteristics of maize response to drought stress during its whole growth period, the agronomic, yield and photosynthetic characteristics of 16 maize inbred lines were compared between drought stress and normal irrigation in this study. The optimal regression equation was established using the drought resistance coefficient as the primary evaluation index through a stepwise regression method. Additionally, the drought resistance of maize inbred lines was determined by combining correlation analysis, membership function, and cluster analysis to select indicator traits for drought resistance. The results showed that 11 traits such as anthesis silking interval, plant height and ear length had significant difference between water treatments. Kernel\|weight per ear, anthesis silking interval and ear length were selected as secondary traits for drought resistance identification of maize inbred lines. The drought resistance of inbred lines was evaluated by two methods. One was by average membership degree of drought resistance coefficient of secondary traits; the other was by average membership degree of drought resistance coefficient of drought occurrence period. The 11 inbred lines of them had the same results. According to the two methods, 16 maize inbred lines were divided into 4 groups by cluster analysis. Among them, 5 were high resistance type, 6 were resistance type, 4 were of medium resistance type and 1 was of susceptible type. Si-287 was with the highest resistance inbred line and X178 was the most susceptible type. |
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