Abstract:Abstract: The aim of this study was to evaluate the fruit color traits of hawthorn germplasm resources via measurements of the chromatism index and anthocyanin content of 51 hawthorn cultivars (Crataegus pinnatifida var. major) that were preserved at the national hawthorn germplasm resource repository (Shenyang). The peel and flesh of these hawthorn resources were initially determined using a colorimeter to identify their chromatism index (L*, a*, and b*), after that the h°, C*, and CIRG (color index of red grape) values were calculated. The content of anthocyanins in the hawthorn peel and flesh was measured using a microplate reader. The relationship between fruit color traits and anthocyanin content in these hawthorn resources was established using correlation analysis, principal component analysis, and cluster analysis. The findings revealed that the anthocyanin content of hawthorn peel was considerably correlated with the CIRG value of the peel, and the anthocyanin content of the flesh, respectively. The a*, C*, and CIRG values of the flesh as well as the CIRG value of the peel were greatly influenced by the anthocyanin content of the hawthorn flesh. 51 hawthorn resources could be divided into four groups based on fruit chromatism index and anthocyanin content. The a* value and anthocyanin content of the flesh were both highest in the first group, while the peel has the lowest a* value and the highest anthocyanin content The a* value and anthocyanin content of the peel were highest and lowest in the second group, respectively, while they are lowest in the flesh. The peel of the third group's fruit has a medium a* value and a high anthocyanin level, whereas the flesh has a higher a* value and a higher anthocyanin content. The higher a* value and medium anthocyanin content of the peel, and medium a* value and anthocyanin content of the flesh were found in the fourth group. The fourth group contained both the peel's higher a* value and medium anthocyanin levels as well as the flesh's medium a* value and anthocyanin content. To provide a reference basis for enhancing the evaluation of hawthorn germplasm resources, this study digitally assigned fruit color trait and assessed the relationship between fruit color traits and its anthocyanin concentration.