Wet-cold tolerance identification and evaluation of 61 cucumber culti-vars with different eco-types

DING Yuanyuan; PAN Yupeng; LIU Hanqiang; MENG Huanwen; CHENG Zhihui

doi:10.16861/j.cnki.zggc.2025.0470

Abstract：To clarify the wet-cold tolerance of cucumber,different cultivars from three eco-types were identified by the wet-cold hurt index and wet-cold tolerance value prediction equation method,respectively.The results showed that in the 61 cultivars,the maximum wet-cold hurt index was 0.950 and the minimum wet-cold tolerance value was 0.127,both re-fer to cultivar JD102;the minimum wet-cold hurt index was 0.103 and the maximum wet-cold tolerance value was 1.408,both refer to cultivar MN3.The greater the wet-cold hurt index,the smaller the wet-cold tolerance value,and the poorer the wet-cold tolerance of the cultivar will be.The quantitative results identified by the two methods were highly consis-tent,reflecting the wet-cold tolerance of the cultivars from different perspectives.Based on the quantitative identification results of both wet-cold hurt index and wet-cold tolerance value,all 61 cultivars can be qualitatively classified into four categories:Wet-cold sensitive type,wet-cold weak tolerant type,wet-cold medium tolerant type and wet-cold strong toler-ant type.There were 8,32,14 and 7 cultivars of the corresponding types for wet-cold hurt index classification,and 9,36,10 and 6 cultivars for wet-cold tolerance value classification,respectively.The two qualitative classification was basically consistent.The wet-cold tolerance of cucumber cultivars was related to their eco-types.In both the European greenhouse type and the North China type,there were cultivars with varying degrees of wet-cold tolerance.However,in the former,the proportion of medium tolerant and strong tolerant cultivars were relatively high.In the South China type,all were wet-cold sensitive or weak tolerant.The research results can provide a basis for the cultivar selection in cucumber cultiva-tion and the wet-cold tolerant breeding.