Screening of salt-tolerant watermelon germplasm at germination stage
WANG Mingdi
ZHANG Yanchu
LI Xingyuan
WANG Binquan
HUANG Zhan
LIU Jinbao
ZHANG Yunling
YOU Shouchang
ZHANG Ruimin
Abstract：The scarcity of salt-tolerant watermelon germplasm resources limits its large-scale production in saline soils.Using 12 watermelon germplasm as test materials,the effects of different concentrations of salt treatments(0,100,150 and 200 mmol·L-1 NaCl)on their germination were studied.The germination rate,germination index,and germina-tion potential were measured,and the salt tolerance of the 12 watermelon germplasm were comprehensively evaluated using methods such as subordinate function analysis and cluster analysis.The results showed that compared with CK(0 mmol·L-1 NaCl),salt treatments at different concentrations reduced the germination potential,germination index,shoot length,and vigor index in most watermelon germplasm,while the salt injury index was the opposite.The salt toler-ance of the 12 watermelon germplasms showed significant difference during the germination stage.By using the subordi-nate function and cluster analysis,the germplasm resources were classified as follows:W62,E125,E62 and B24 as salt-tolerant,B12,C84,C21,A79 and D12 as moderately salt-tolerant,C5,D47 and B56 as salt-sensitive.The research results provide materials for the exploration of salt-tolerant genes and the breeding of salt-tolerant varieties in watermelon.
Keywords：WatermelonSalt toleranceGermination stageCluster analysisGermplasm screening
Publication Date：2025-07-05
Online Publishing Date：2025-09-12(First online date of this platform, not the publication date of the document)
Pages：10( 62-71 )