Fig. 2From: Homoeolog expression bias in allopolyploid oleaginous marine diatom Fistulifera solarisPCA based on codon usage frequency of homoeologous genes in each chromosome. The figure shows the two dimensional principal component analysis (PCA) results based on first principal component (PC1) and second principal component (PC2). Each plotted number represents a chromosome number and the colour corresponds to the subgenome to which they belongBack to article page