| Screening on drought simulation conditions and drought-resistant parameters at germination stage of triticale |
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| DOI：10.7606/j.issn.1000-7601.2017.02.16 |
| Key Words: triticale germination stage drought condition drought-resistant parameter screening |
| Author Name | Affiliation | | ZHAO Fang-yuan | College of Pratacultural Science, Gansu Agricultural University/Key Laboratory of Grassland Ecosystem, Ministry of Education/Pratacultural Engineering Laboratory of Gansu Province/Sino-U.S. Center for Grazingland Ecosystem Sustainability, Lanzhou, Gansu 730070, China | | TIAN Xin-hui | College of Pratacultural Science, Gansu Agricultural University/Key Laboratory of Grassland Ecosystem, Ministry of Education/Pratacultural Engineering Laboratory of Gansu Province/Sino-U.S. Center for Grazingland Ecosystem Sustainability, Lanzhou, Gansu 730070, China | | DU Wen-hua | College of Pratacultural Science, Gansu Agricultural University/Key Laboratory of Grassland Ecosystem, Ministry of Education/Pratacultural Engineering Laboratory of Gansu Province/Sino-U.S. Center for Grazingland Ecosystem Sustainability, Lanzhou, Gansu 730070, China |
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| Abstract: |
| Using 4 triticale genotypes as materials, an experiment was carried out with different concentrations (0, 10%, 20%, 30% and 40%) of polyethylene glycol (PEG-6000) to simulate drought stress, and the parameters including seed germination potential, germination rate, germination index and length of primary root and coleoptiles were measured, so as to study drought simulation conditions at germination stage of triticale. The gray correlative degree analysis was adopted to screen drought-resistant parameters. Furthermore, the drought resistance of different triticale genotypes was evaluated, based on the correlation between drought resistant index and various parameters and combined with subordinate function method. The results showed that the suitable PEG-6000 concentration for screening drought resistance of triticale at germination stage was 30%; the germination rate was most closely related to drought resistance of triticale at germination stage; low PEG-6000 concentration (10% and 20%) was beneficial to seed germination of triticale and could stimulate the growth of primary root and coleoptile, but 40% PEG-6000 inhibited seed germination completely. The drought resistance of the tested triticale genotypes was ordered as: Zhongsi 1048＞Shida No.1＞P4＞P2. Zhongsi 1048 belonged to the medium drought-resistant type, Shida No.1 belonged to the middle type and the other 2 belonged to the drought-sensitive type. |
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