ObjectiveThe genetic diversity of phenotypic traits of blueberry germplasm resources was studied in Shandong and Jilin provinces to provide theoretical basis for the conservation and genetic improvement of the germplasm resources.

MethodThe phenotypic traits of 47 blueberry varieties were measured, and the phenotypic diversity among blueberry varieties was discussed by principal component analysis, correlation analysis and cluster analysis.

ResultPrincipal component analysis showed that the first four principal component characteristic root values greater than 0.5 contained 25 traits, with a cumulative contribution rate of 53.477%, accounting for 67.57% of the survey indicators. 62 pairs were significantly correlated with the number of phenotypic traits, 40 pairs were significantly correlated. Blueberry varieties, phenotypic trait variation of rich germplasm resources, quality traits and aromatic wiener diversity index distribution of quantitative traits ranged in 0.32−1.36 (average 0.87) and 0.22−2.06 (average 1.8), the quality characters of 15, contained 52 mutation types. There were 22 quantitative traits, and the coefficient of variation ranged from 11.39% to 46.98%. This indicated that the quantitative traits of blueberry phenotype showed more extensive variation than the qualitative traits.When the Euclidean distance was 17, 47 blueberry varieties were divided into 5 groups. Each group had a certain correlation with the cultivated habitat and cultivated group.

ConclusionIn this study, we identified 40 blueberry varieties of Jilin Province and Shandong Province both phenotypic diversity and genetic relationship, the choice in cultivating blueberry new varieties, parents should focus on canopy, shrub height, canopy length to diameter, thickness of fruit powder, fruit sepals by posture, fruit hardness, fruit sepals length-width ratio, looks like the fruit sepals type, such as index, the results can provide reference for excellent germplasm resource evaluation and selection.