Drought Stress on Different Maize Inbred Lines at Germination Stage

doi:10.11924/j.issn.1000-6850.casb16120083

Abstract

Abstract: Seed germination period is an important period of plant growth, but also to evaluate the drought resistance.In order to clarify the drought resistance of different maize inbred lines, 254 germplasm maize inbred lines at germination stage were treated with PEG under simulated drought condition.The germination index，germination rate, root number, root fresh weight, root dry weight, stem fresh weight, stem dry weight, root length and seedling height were measured. The relative index was used to identify the seed of different inbred lines drought resistance at germination period.The results showed that seed germination of maize inbred lines was inhibited under PEG6000 stress.The relative indexes of all traits were significantly or very significantly correlated with the comprehensive drought resistance of the cultivars.Drought resistance of different inbred lines were significantly different. Through the membership function method combined with drought resistance grading criteria, 99 medium drought-resistant materials were screened.Therefore, the method can be used as a simple method to identify maize inbred line drought resistance at germination stage.

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