Figure 4
Genetic structure of temperate japonica rice varieties in Japan. Principal component analysis of temperate japonica rice in Japan based on whole-genome sequence data, with the x-axis representing the PC1 and the y-axis representing the PC2: (a) 2018; (b) 2019. Values in parentheses indicate the percentage contribution of each principal component. The yellow, blue and black markers indicate landraces, breeding varieties and unidentified varieties, respectively. Principal component analysis was performed using the package ‘pcaMethods’67 for R software (https://www.R-project.org/)65.
