Fig. 2

PCA plots for mt+ (A) and mt- (B) transcriptomes during gametogenesis. Biological replicates (n = 3) are indicated with the same color and shape. C: Linear regression analysis of gene contribution to PC1 variation during Ulva gametogenesis (P < 0.001). The x-axis represents the gene contribution to PC1 variation of mt- and the y-axis represents the gene contribution to PC1 variation of mt+. Outlier genes with residuals bigger than 0.01 are indicated with red color and are considered SBGs during Ulva gametogenesis. The dashed lines indicate the 90% prediction interval of the linear model.