| Identification and comprehensive evaluation of drought resistance of early\|maturing maize inbred lines at germination and seedling stages |
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| DOI：10.7606/j.issn.1000-7601.2026.01.03 |
| Key Words: early\|maturing maize inbred lines germination stage seedling stage drought\|resistance identification two\|stage drought evaluation |
| Author Name | Affiliation | | REN Xiaoyan | College of Agriculture, Shanxi Agricultural University, Jinzhong, Shanxi 030031, China | | BAI Yuming | The Center of Agriculture and Technology Extension in Lvliang City, Lvliang, Shanxi 033000, China | | GUO Feng | College of Agriculture, Shanxi Agricultural University, Jinzhong, Shanxi 030031, China | | CHANG Bo | Jinzhong Water Resources Development Center, Jinzhong, Shanxi 030600, China | | WANG Yi | College of Agriculture, Shanxi Agricultural University, Jinzhong, Shanxi 030031, China | | ZHANG Yu’e | The Center of Agriculture and Technology Extension in Lvliang City, Lvliang, Shanxi 033000, China |
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| Abstract: |
| In order to to investigate the drought resistance of different early\|maturing maize inbred lines at both germination and seedling stages, and to establish a ‘germination\|seedling’ two\|stage drought resistance evaluation technology system, 47 early\|maturing maize inbred lines were used as experimental materials, to identify excellent inbred lines with drought resistance at both germination and seedling stages. The results showed that, -0.30 MPa (PEG-6000) treatment was identified as the optimal osmotic pressure concentration for evaluating drought resistance in maize inbred lines at the germination stage. By measuring the seed germination drought tolerance index under this osmotic stress, 23 inbred lines with resistant and highly resistant levels were selected. The survival rate after recurrent drought survival rate was measured at the seedling stage, leading to the selection of 29 inbred lines with resistant and highly drought resistant. Based on the comprehensive evaluation, 20 inbred lines demonstrated resistant and highly resistant at both germination and seedling stages, including four lines with highly drought resistant: 206-305, NY624, 207Y-4, and H19-9. Drought resistance levels of six inbred lines showed susceptible and highly susceptible, among which, one line of H05-100 was classified as highly susceptible. |
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