PEG胁迫下不同胡麻品种种子萌发期抗旱性鉴定

Drought tolerance identification of different oilseed flax varieties at germination stage under PEG stress

以14份胡麻新品种为材料,采用0（对照）、21%浓度聚乙二醇（PEG-6000）处理模拟干旱胁迫,以研究干旱胁迫下不同胡麻品种萌发期抗旱特性的反应差异。结果表明：21%PEG胁迫下,不同品种的相对发芽势、相对发芽率、相对胚芽长、相对胚芽鲜重、相对胚根长、相对胚根鲜重、相对发芽指数、活力指数和萌发指数9个指标表现并不一致,抗旱性评价需要进行多指标的综合考虑。采用隶属函数值和抗旱指标权重相结合的抗旱性度量值进行抗旱性评价,14个品种的D值在0.323-0.868,差异明显,晋亚11号的抗性居第一位,D值达到了0.868,其次为坝亚12号,D值为0.787,居第二位;伊亚4号、晋亚10号的D值分别为0.381、0.323,位列最后,抗性最差。

The experiments were conducted to investigate and identify the response difference of drought resistance traits of different oilseed flax varieties at germination stage,which used 21% PEG- 6000 simulation experiments by 14 new varieties of oilseed flax domestic. The results indicated that the nine indexes including relative germination emerge、relative germination rate、relative germ length and fresh weight、relative radicle length and fresh weight、relative germination index、vitality index and sprout index performances were not consistent. The drought resistance evaluation of oilseed flax need comprehensive consideration about multi-index. To use comprehensive consideration evaluation by integrating membership function values and drought resisting index weight,the D value ranged from 0. 323 to 0. 787,the drought resisting obvious difference. The best drought resisting of D value reached0. 868,was Jinya 11,following by Baya 12,its D value was 0. 787. The D values of drought resistance of oilseed flax varieties in the last were 0. 381 and 0. 323,these were Yiya 4 and Jinya 10,respectively.