Identification of Drought Tolerance of Barley with Different Grain Colors in Germination Stage
In order to investigate the correlation between barley seed color and drought resistance.This study used 16 colored barley as materials to determine the germination vigor,germination rate,germination vitality index,ger-mination index,seedling length,root length and seed coat color index Y(color brightness)and U(color concentra-tion)values under normal and 15％PEG stress.Comprehensive comparison of drought resistance using methods such as correlation analysis,principal component and cluster analysis.The results showed that germination potential and germination vigor index were the most sensitive to drought stress,and root length and bud length had the least changes;seed coat color brightness had a negative correlation with comprehensive F value of drought resistance,and color concentration had a positive correlation with comprehensive F value of drought resistance;comprehensive analysis of each index information showed that the thicker and brighter the seed color,the stronger the drought resis-tance of 16 materials;dark color was the main reason for drought resistance.The results showed that the drought re-sistance of highland barley was higher than that of light color highland barley at germination stage;the strong drought resistance materials included'Yellow Hulless Barley'and'Wuxi Gold Hulless Barley',the moderate drought resistance materials included'Puba village farmer's seed'and'Qiongjie Wild Barley',and the weakest ones are'Kangqing 3','Purple Hulless Barley','Rikaze17'and so on,there are 12 of them.This study will provide the latest theoretical reference for the study of stress resistance of colored barley.
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