Analysis on salt-alkali resistance of 29 cucumber varieties at germination stage

ZHANG Yue; WEI Qiuyang; WANG Xinyu; XIE Yang; ZHANG Jiaojiao; WANG Chen; LI Xiaoli; SONG Xiaofei; YAN Liying; JIA Jianhua

doi:10.16861/j.cnki.zggc.2025.0591

Abstract：To clarify the salt-alkali tolerance of cucumber seeds during germination,29 cucumber varieties were subjected to germination tests using mixed salt-alkali solutions(0 mmol·L-1,50 mmol·L-1 and 100 mmol·L-1;the amount of sub-stance ratio of NaCl,Na2SO4,Na2CO3,NaHCO3 was 1∶9∶1∶9).The relative germination energy(RGP),relative germina-tion rate(RGR),germination stress index(GSI)and relative germination time(RGT)were measured.Principal compo-nent analysis and membership function analysis were used to comprehensive evaluate the salt-alkali tolerance of 29 cu-cumber varieties at germination period.The results showed that the relative germination potential,relative germination rate,germination stress index and relative germination time of the tested cucumber varieties were consistent with the membership ranking and could be used as indicators to evaluate the salt-alkali tolerance of cucumber seeds during the ger-mination period.Three principal components were extracted by principal component analysis,with a cumulative contribu-tion rate of 91.069%.Five relatively salt-alkali tolerant materials were screened,namely Ruiguang No.2,Zhuoyue No.1,Jinchun No.5,Jingyan Xiamei No.2 and Zhongnong No.6;and the following five materials were selected as salt-alkali sensitive varieties,including Jinpai 618,Chaoliang Nairewang,Jinyuan No.16,Jinchun No.4 and Zhongnong No.12.This research results can provide a certain reference for the breeding of salt-alkali tolerant cucumber.