大麦种子萌发期抗旱性鉴定指标的筛选及抗旱性评价

Screening Drought Resistance Identification Index and Drought Resistance Evaluation in Barley during Seed Germination Period

【目的】研究大麦种子萌发期形态指标与抗旱性的关系,构建抗旱性评价方法。【方法】采用20%PEG8000模拟干旱胁迫,测定其9项形态指标。采用相关性分析及因子分析等筛选大麦种子萌发期抗旱性鉴定指标,并运用隶属函数法对101份大麦材料进行抗旱性综合评价。【结果】这9项形态指标与抗旱性均呈显著的相关关系。【结论】发芽势、发芽率、胚根长、胚芽长、胚芽鞘长、胚根干重、胚芽干重、根冠比、物质转运速率等指标均可作为大麦种子萌发期重要的抗旱性鉴定指标。采用隶属函数法筛选出Z027S078T、新引D7为抗旱性极强的材料;垦啤6号、贝赖勒斯为抗旱性极弱的材料。

【Objective】To study the relationship between morphological indexes and drought resistance during seed germination in barley is to build drought resistance evaluation method. 【Method】In the experiment,the nine morphological indexes of barley treated by 20%（ W / V） PEG8000 solution as drought stress treatment were determined. The drought resistance identification indexes of barley during seed germination were screened by correlation analysis and factor analysis and the drought resistances of 101 barley cultivars were evaluated by the method of membership function. 【Result】There were significant relationships between the 9 morphological indexes and drought resistance of barley during seed germination.【Conclusion】The 9 indexes can be regarded as drought resistance identification index of barley during seed germination. Z027S078 T and Xinyin D7 were screened as high drought resistance cultivars,while Ganpi 6 and Beilaileisi were screened as drought sensitive cultivars by the method of membership function.