| Evaluation of drought resistance of winter wheat under drought stress simulation at germination stage |
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| DOI：10.7606/j.issn.1000-7601.2017.06.17 |
| Key Words: wheat germination stage drought resistance coleoptile length membership function method clustering analysis |
| Author Name | Affiliation | | SUN Lv | College of Agronomy and Plant Protection, Qingdao Agricultural University, Shandong Provincal Key Laboratory of Dryland Farming Techniques, Qingdao, Shandong 266109, China
Qingdao Academy of Agricultural Sciences, Qingdao, Shandong 266100, China | | LI Yu-gang | Qingdao Academy of Agricultural Sciences, Qingdao, Shandong 266100, China | | WANG Sheng-jian | Qingdao Academy of Agricultural Sciences, Qingdao, Shandong 266100, China | | LIU Ya-dong | College of Agronomy and Plant Protection, Qingdao Agricultural University, Shandong Provincal Key Laboratory of Dryland Farming Techniques, Qingdao, Shandong 266109, China | | WANG Zhi-ying | Qingdao Academy of Agricultural Sciences, Qingdao, Shandong 266100, China | | LIU Dan | Qingdao Academy of Agricultural Sciences, Qingdao, Shandong 266100, China | | LI Na-na | Shandong Center of Crop Germplasm Resources, Jinan, Shandong 250100, China | | ZHAO Chang-xing | College of Agronomy and Plant Protection, Qingdao Agricultural University, Shandong Provincal Key Laboratory of Dryland Farming Techniques, Qingdao, Shandong 266109, China | | GE Hong-mei | Qingdao Academy of Agricultural Sciences, Qingdao, Shandong 266100, China |
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| Abstract: |
| To identify winter wheat varieties with high germination rate, which is suitable for dry area of north China, drought treatments were performed using -0.50 MPa (19.6%) PEG-6000 aqueous solution. The results showed that the averages of the five traits under treatment were decreased by 77.3%, 40.0%, 30.7%, 16.7% and 78.0%, respectively compared with the control. Analysis with the traits of drought resistance showed that the 19.6% PEG-6000 simulation stress promoted the main radicle length elongation of some varieties, including Lovlin 13, Wennong 14 and Lunxuan 987, which may be active in drought-resistance response. D value calculated by the weighting membership function method was positively correlated with drought resistance indices, such as the coleoptile length, root number. According to UPGMA algorithm with drought resistance coefficient, the material was divided into two major categories in the genetic distance of 0.82. Accordingly, the strongest drought-resistance germplasm was indentified as Lovlin 13, Wennong 14, Chinese spring wheat, Luomai 8, Lunxuan 987, Taishan 22, Shannong 17, Tainong 18, Yanhangxuan 2, Zhongyu 6, Lumai 14, Tainong 6258 and Tainong 2987. |
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