Diversity of chromoviral lineages in B. vulgaris . (A) Dendrogram representing the amino acid sequences of 921 reverse transcriptases (RTs) of chromoviral Ty3-gypsy retrotransposons in B. vulgaris. Stars represent the position of chromoviral families (Tekay clade: Bongo 1 to 3; Galadriel clade: Beon 1; CRM clade: Beetle 3 to 7; Reina clade: Bingo 1 to 7) analyzed in detail. (B) Box plot representing the amino acid sequence identity between the RTs of all four clades. The median is indicated with a vertical line, and the upper and lower quartiles are within the box.