Fig. 2

Mutual insertions of LTR retrotransposon families. Number of insertions of individual retrotransposon families (marked by different colors in vertical column) into other families (indicated below) in 12 plant species. Preferential autoinsertions (insertions into the same family) are most frequent in Solanum tuberosum, Solanum lycopersicon, Gossyphium raimondii and Lotus japonicus and are marked by triangles within columns. Plant species are ordered according to descending number of nested TEs (a-l)