Comparison of combined high humidity and chilling tolerance for twelve cucumber varieties(lines)at the germination and seedling stage
WANG Bo
QIN Yuhong
LI Lei
ZHANG Shoucai
ZHANG Gongchen
Abstract：Low temperature and high humidity are limiting factors for the autumn-winter cultivation of cucumber in solar and tunnel greenhouse.To explore the wet-chilling tolerance of different cucumber varieties(lines),twelve varieties(lines)were comprehensively compared under controlled conditions.The results showed that obvious differences had been observed in relative germination rate,relative germination potential,and relative germination index among twelve materials at 15 ℃.The cultivar JY,exhibited significantly higher relative germination index than other varieties(lines).The identification of wet-chilling tolerance during the seedling stage showed that the growth of cucumber seedlings was significantly inhibited under wet and chilling conditions,and the antioxidant enzyme activity and malondialdehyde con-tent varied greatly among different varieties(lines).Comprehensive evaluation results showed that QY30 had the highest D value of 0.942 and JY1 ranked second with a D value of 0.774.The D values of QY20 and QD29 were 0.218 and 0.217,respectively.Correlation analysis showed that the D value was extremely significantly negatively correlated with the wet-chilling damage index.The wet-chilling resistance of varieties(lines)JY1 and QY30 was relatively high,while the relatively wet-chilling resistance of lines QY20 and QY29 was relatively low.These results can provide the basis for utilization of cucumber wet-chilling resistant germplasm and wet-chilling resistant gene mining.
Keywords：CucumberWet-chilling toleranceAntioxidant enzyme activityRelative germination indexSeedling stage
Publication Date：2025-03-05
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 82-87 )