| Evaluation of drought resistance of sorghum varieties (lines) after anthesis in Shanxi Province |
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| DOI：10.7606/j.issn.1000-7601.2023.02.02 |
| Key Words: sorghum varieties (lines) drought resistance after anthesis agronomic traits quality traits photosynthetic traits |
| Author Name | Affiliation | | LV Xin | Sorghum Research Institute, Shanxi Agricultural University, Shanxi Key Laboratory of Sorghum Genetics and Germplasm Innovation, Jinzhong, Shanxi 030600, China | | PING Jun’ai | Sorghum Research Institute, Shanxi Agricultural University, Shanxi Key Laboratory of Sorghum Genetics and Germplasm Innovation, Jinzhong, Shanxi 030600, China | | NIU Hao | Sorghum Research Institute, Shanxi Agricultural University, Shanxi Key Laboratory of Sorghum Genetics and Germplasm Innovation, Jinzhong, Shanxi 030600, China | | WANG Yubin | Sorghum Research Institute, Shanxi Agricultural University, Shanxi Key Laboratory of Sorghum Genetics and Germplasm Innovation, Jinzhong, Shanxi 030600, China | | CHU Jianqiang | Sorghum Research Institute, Shanxi Agricultural University, Shanxi Key Laboratory of Sorghum Genetics and Germplasm Innovation, Jinzhong, Shanxi 030600, China | | WANG Rui | Sorghum Research Institute, Shanxi Agricultural University, Shanxi Key Laboratory of Sorghum Genetics and Germplasm Innovation, Jinzhong, Shanxi 030600, China | | FAN Fangfang | Sorghum Research Institute, Shanxi Agricultural University, Shanxi Key Laboratory of Sorghum Genetics and Germplasm Innovation, Jinzhong, Shanxi 030600, China | | JU Lan | Sorghum Research Institute, Shanxi Agricultural University, Shanxi Key Laboratory of Sorghum Genetics and Germplasm Innovation, Jinzhong, Shanxi 030600, China |
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| Abstract: |
| Using 22 sorghum varieties that have been approved, identified and registered in Shanxi Province over the years as test materials and adopting the natural field identification method under natural drought (DS) and normal irrigation (NI) treatments, the agronomic traits, quality traits and photosynthetic traits were investigated. The membership function (U) and drought sensitivity index (S) were used for clustering analysis and heat map. The two methods were combined to classify the materials, and the drought resistance indexes were comprehensively evaluated. The results were as follows: under drought stress, except for the average increase of spike handle extend length by 5.26 cm and tannin content by 0.09%, the other trait indexes of sorghum varieties (lines) decreased. Except the net photosynthetic rate, all the other traits were correlated to some extent. Two methods were used to screen out three extremely resistant varieties (S9, S10 and S7, i.e. Jinza 108, Jinza 22 and Jinza 101) and one extremely weak variety (S17, i.e. Jinza 4). According to the drought\|sensitive index, there were 9 traits in the principal component analysis, and the cumulative contribution rate of principal component was 84.662%. Yield and single spike grain weight were the main traits determining the first principal component, and the contribution rate was 17.999%. Drought stress had significant effects on the main character indexes of sorghum cultivars (lines) after anthesis. The drought resistance of different sorghum materials was significantly different. Combining two drought resistance evaluation methods, the results of drought resistance of the tested sorghum varieties (lines) were more accurately. Yield, single spike grain weight, plant height and inverted two\|leaf width are recommended to evaluate sorghum drought resistance after anthesis. |
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