| Evaluation of responses of different wheat varieties to spring frost injury and their frost resistance |
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| DOI：10.7606/j.issn.1000-7601.2020.01.17 |
| Key Words: wheat frost resistance physiological index frostbite rate of young panicle yield subordinate function analysis |
| Author Name | Affiliation | | XI Jilong | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | WANG Ke | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | YANG Na | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | XI Tianyuan | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | ZHANG Jiancheng | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | YAO Jingzhen | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | XI Kaipeng | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | LI Yongshan | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | JIA Xiuling | Institute of Cereal and Oil Crops of Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, Hebei 050035, China |
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| Abstract: |
| The experiment was conducted to evaluate wheat varieties responses to late frost with 16 wheat varieties in the field in Southern Shanxi Province. The physiological and other indices including relative electrical conductivity, chlorophyll content, fluorescence parameters (Fv/Fm), photosynthetic rate, malondialdehyde (MDA) content, superoxide dismutase (SOD) activity, peroxidase (POD) activity, and catalase (CAT) activity, frostbite rate, yield, and yield component after natural frost injury happened in spring were measured. The relative value of each index was used for the comprehensive evaluation of membership degree (D value) and cluster analysis. The results showed that the chlorophyll content, fluorescence parameters (Fv/Fm), and photosynthetic rate of wheat leaves decreased by 5.9%、1.0%、and 34.4%, respectively while the SOD activity, POD activity, CAT activity, MDA content, and relative electrical conductivity of leaves increased by 46.7%、33.7%、8.4%、20.8%、and 32.8% after frost stress at the jointing stage, respectively. There were significant differences (P<0.05 or P<0.01) among varieties. The average membership value of varieties was 0.192~0.911, the frostbite rate of young ears was 1.3%~41.8%, and the yields ranged from 4 328.1 to 8 222.3 kg·hm-2. The yield and yield structure were significant different. Based on D value and frostbite rate of young panicle and yield, 16 wheat varieties were clustered into 5 categories. Category I included Jimai 22, LinY8012, and Shannong 28; Category II included Shunmai 1718, Jimai 23, Zhongmai 36, and Yannong 1212; Category III included Shannong 30, Jinmai 84, Hengza 102, Shiluan 02-1, Kenong 2009, and Zhoumai 18; Category IV included Jimai 325, and Xinong 585; Category V included Xinong 529. From I to V, winteriness was weaker, while springiness was stronger and the ability to resist late frost was weaker. Therefore, higher frost resistant wheat variety should be planted. |
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