探索不同冬小麦品种萌发期的抗旱性，为冬小麦培育耐旱新品种提供理论依据。采用PEG-6000模拟干旱胁迫，测定10个冬小麦品种在干旱胁迫下的发芽势、发芽率、胚芽长、胚根长、胚芽鞘长、根冠比、胚根数等指标。结果表明，随着PEG-6000浓度的升高，不同冬小麦品种萌发期的发芽势、发芽率、芽长、胚根数整体表现为下降趋势，胚芽鞘长、主胚根长呈先升高后降低的趋势，根冠比整体呈升高趋势。综合分析认为，陇中3号、陇中4号、陇中5号、陇中6号、陇中8号、陇中10号、长6878的抗旱性较好，适宜在陇中干旱半干旱区及相似生态类型区域推广种植。

In order to explore the drought resistance of different winter wheat varieties at germination stage so as to provide a theoretical basis for the breeding of drought-resistant winter wheat, PEG-6000 was used to simulate drought stress, and the germination potential, germination rate, bud length, radicle length, coleoptile length, root-shoot ratio and main radicle number of different wheat varieties under drought stresswere measured. Results showed that with the increase of PEG-6000 concentration, the germination potential, germination rate, bud length and radicle number of winter wheat at germination stage were decreased, the coleoptile length and main radicle length were increased first and then decreased, and the root-shoot ratio was increased. In conclusion, Longzhong 3, Longzhong 4, Longzhong 5, Longzhong 6, Longzhong 8, Longzhong 10 and Chang 6878 had good drought resistance, and were suitable for planting in arid and semi-arid areas of Longzhong and similar ecological types.

S512.1

定西市科技计划资助项目(DX2023BZ48、DX2024AZ12)；甘肃省科技厅重点研发计划-国际合作领域(24YFWJ001)。