| Identification of agronomic traits and drought tolerance at germination stage of 44 local foxtail millet varieties from Shanxi Province |
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| DOI：10.7606/j.issn.1000-7601.2024.02.04 |
| Key Words: foxtail millet agronomic traits drought tolerance germination stage Shanxi local varieties |
| Author Name | Affiliation | | HOU Sen | Center for Agriculture Genetic Resources Research, Shanxi Agriculture University, Key Laboratory of Crop Gene Resources and Germplasm Enhancement on Loess Plateau, Ministry of Agriculture, Shanxi Key Laboratory of Genetic Resources and Genetic Improvement of Minor Crops, Taiyuan, Shanxi 030031, China | | QIN Huibin | Center for Agriculture Genetic Resources Research, Shanxi Agriculture University, Key Laboratory of Crop Gene Resources and Germplasm Enhancement on Loess Plateau, Ministry of Agriculture, Shanxi Key Laboratory of Genetic Resources and Genetic Improvement of Minor Crops, Taiyuan, Shanxi 030031, China | | LI Meng | Center for Agriculture Genetic Resources Research, Shanxi Agriculture University, Key Laboratory of Crop Gene Resources and Germplasm Enhancement on Loess Plateau, Ministry of Agriculture, Shanxi Key Laboratory of Genetic Resources and Genetic Improvement of Minor Crops, Taiyuan, Shanxi 030031, China | | WANG Haigang | Center for Agriculture Genetic Resources Research, Shanxi Agriculture University, Key Laboratory of Crop Gene Resources and Germplasm Enhancement on Loess Plateau, Ministry of Agriculture, Shanxi Key Laboratory of Genetic Resources and Genetic Improvement of Minor Crops, Taiyuan, Shanxi 030031, China | | MU Zhixin | Center for Agriculture Genetic Resources Research, Shanxi Agriculture University, Key Laboratory of Crop Gene Resources and Germplasm Enhancement on Loess Plateau, Ministry of Agriculture, Shanxi Key Laboratory of Genetic Resources and Genetic Improvement of Minor Crops, Taiyuan, Shanxi 030031, China |
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| Abstract: |
| Totally 44 foxtail millet varieties (lines) collected from different areas in Shanxi were used. Twelve agronomic traits, two quality related traits and drought tolerance related indicators at germination stage were identified, which drought condition was simulated by PEG-6000. Agronomic traits including sheath color (ShC), seedling leaf color (SLC), main stem length (MSL), main stem diameter (MSD), main stem node number (MSNN), panicle length (PL), panicle type (PT), panicle tightness (PTi), grain color (GC), millet color (MC), whole growth period (WGP) and 1000-grain weight (1000-GW). Quality related traits including starch content (SC) and protein content (PC). Promptness index (PI), germination rate (GR), root length (RL), sprout length (SL) and root length per sprout length (R/S) as drought\|related traits were measured under -0.5 MPa PEG stress. The coefficients of variation (CV,%) of quantitative traits ranged from 1.32% (SC) to 22.31% (MSD). Correlation analysis indicated that MSNN showed significant and positive correlation with MSL, and significant and negative correlation with MSD. 1000-GW showed significant and positive correlation with MSD and PL, and significant and negative correlation with MSNN. PC showed a significant and negative correlation with MSL and SC. The CV of drought\|related traits ranged from 13.7% (RL) to 22.86% (PI) under drought stress, and 10.92% (RL) to 17.82% (R/S) under normal condition, respectively. Germination drought resistance index (GDRI) was calculated to identify drought tolerance capacity of foxtail millet accessions, seventeen elite drought tolerance accessions were selected. Correlation analysis was conducted to explore the relationships among drought\|related traits. Relative root length per sprout (RR/S) showed significant and positive correlation with RRL, and significant and negative correlation with RSL. The drought resistance of various millet materials during the bud stage was evaluated by combining the germination drought resistance index with cluster analysis, and they were divided into 5 levels. Seventeen first\|level drought resistant resources, such as ‘Changbogu’ were selected. |
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