| Comprehensive evaluation of drought tolerance of sorghum germplasm resources during germination period |
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| DOI：10.7606/j.issn.1000-7601.2025.02.04 |
| Key Words: sorghum germplasm resources germination stage drought tolerance comprehensive evaluation |
| Author Name | Affiliation | | WU Guojiang | Key Laboratory of State Ethnic Affairs Commission of Ecological Agriculture in Horchin Sandy Land, Inner Mongolia Minzu University, Tongliao, Inner Mongolia 028000, China | | ZHOU Wei | Key Laboratory of State Ethnic Affairs Commission of Ecological Agriculture in Horchin Sandy Land, Inner Mongolia Minzu University, Tongliao, Inner Mongolia 028000, China | | LV Jingbo | Tongliao Institute of Agricultural and Animal Husbandry Sciences, Tongliao, Inner Mongolia 028000, China | | WANG Zhenguo | Key Laboratory of State Ethnic Affairs Commission of Ecological Agriculture in Horchin Sandy Land, Inner Mongolia Minzu University, Tongliao, Inner Mongolia 028000, China
Tongliao Institute of Agricultural and Animal Husbandry Sciences, Tongliao, Inner Mongolia 028000, China | | LI Yan | Key Laboratory of State Ethnic Affairs Commission of Ecological Agriculture in Horchin Sandy Land, Inner Mongolia Minzu University, Tongliao, Inner Mongolia 028000, China
Tongliao Institute of Agricultural and Animal Husbandry Sciences, Tongliao, Inner Mongolia 028000, China | | YU Zhonghao | Key Laboratory of State Ethnic Affairs Commission of Ecological Agriculture in Horchin Sandy Land, Inner Mongolia Minzu University, Tongliao, Inner Mongolia 028000, China | | DENG Zhilan | Tongliao Institute of Agricultural and Animal Husbandry Sciences, Tongliao, Inner Mongolia 028000, China | | CUI Fengjuan | Tongliao Institute of Agricultural and Animal Husbandry Sciences, Tongliao, Inner Mongolia 028000, China | | LI Mo | Tongliao Institute of Agricultural and Animal Husbandry Sciences, Tongliao, Inner Mongolia 028000, China | | XV Qingquan | Tongliao Institute of Agricultural and Animal Husbandry Sciences, Tongliao, Inner Mongolia 028000, China | | ZHOU Yaxing | Key Laboratory of State Ethnic Affairs Commission of Ecological Agriculture in Horchin Sandy Land, Inner Mongolia Minzu University, Tongliao, Inner Mongolia 028000, China |
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| Abstract: |
| In this study, 30 sorghum germplasms were treated with simulated drought stress using PEG-6000 at different concentrations as a penetrant. The results showed that 15% PEG-6000 was the appropriate concentration for sorghum germplasm stress. Under this treatment of concentration stress, the drought tolerance of 279 sorghum germplasms was comprehensively evaluated at the germination stage. The results showed that the coefficient of variation of the nine drought tolerance indexes ranged from 21.6% to 52.6%. According to the correlation degree of each index, three key drought tolerance indexes, germination potential, germination rate and germination index were determined. Through principal component analysis, the nine drought tolerance indexes were integrated into three independent comprehensive indexes (principal component values), and the cumulative contribution rate of these three principal component values was 88.044%. Based on principal component analysis, the comprehensive evaluation D value of drought tolerance of sorghum germplasm at germination stage was calculated by membership function method. At the same time, based on grey correlation analysis, the relative sticking progress of drought tolerance of sorghum germplasm at the germination stage was calculated by DTOPSIS method, and then the D value and relative sticking progress were averaged to obtain a new comprehensive evaluation value. Based on the new comprehensive evaluation value, 279 sorghum germplasms were classified into five categories using the Euclidean distance and class average method. These categories include 29 extremely drought\|tolerant germplasms, 170 drought\|tolerant germplasms, 52 moderately drought\|tolerant germplasms, and 28 drought\|sensitive germplasms (12 sensitive and 16 highly sensitive). |
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