Fruit quality analysis and comprehensive evaluation of 85 tomato germ-plasm resources with different fruit types

LI Ziwei; LÜ Xia; SU Tian; ZHANG Yinghua; XU Bin

doi:10.16861/j.cnki.zggc.2025.0426

Abstract：Using 85 tomato germplasm resources with different fruit types as experimental materials,a systematic study was conducted on the fruit appearance quality,flavor quality,and nutritional quality.Multiple statistical methods,includ-ing correlation analysis,principal component analysis,and membership function method were employed to comprehen-sively evaluate the fruit quality.The results showed that in terms of appearance quality,medium-sized tomato exhibited rich variations in fruit shape,while small type and cherry type were mainly oblong,round and high round.The mature fruit color was dominated by red fruit.In terms of flavor quality,the content of citric acid and malic acid of different fruit types showed a large coefficient of variation,both of which were more than 40％.In terms of nutritional quality,the con-tent of vitamin C,folic acid and the average content of 5 nutritional quality indicators in cherry fruit type tomato were all higher than those in medium and small fruit type.The results of the correlation analysis showed that the overall appear-ance quality of the fruit was significantly negatively correlated with the nutritional quality.Among the flavor qualities,all traits showed a certain positive correlation except for the relationship between total acid content and sugar-acid ratio.In nutritional quality traits,the correlation between vitamin C content and lycopene content was not significantly.Through comprehensive evaluation using principal component analysis combined with the membership function method,13 materi-als with superior quality(X＞0.6)were selected.The membership function scores indicated that cherry fruit type tomato ex-hibited better quality than that of small fruit tomato,while small fruit tomato outperformed medium fruit tomato in quali-ty.In conclusion,the large variation coefficient of citric acid and malic acid in tomato fruit provided significant selection potential in breeding process.The comprehensive quality of cherry fruit type was superior to that of medium and small fruit type.The results of this study can provide a theoretical basis for the evaluation of tomato fruit quality and variety im-provement.