Figure 4

Phylogenetic distribution of Stowaway elements and empty sites. Maximum-likelihood (ML) estimate of Triticeae relationships based on a previous analysis of β-amylase gene sequences [15], showing the phylogenetic distribution of intron 4 Stowaway elements and excision sites. Where relevant, numbers after taxon names distinguish individuals within species, and letters distinguish cloned sequences from within individuals. Bayesian posterior probabilities ≥ 0.95 are shown above nodes, and ML bootstrap support ≥ 75% is shown below nodes. Blue boxes indicate partial and full elements; element lengths are given after the corresponding taxon names. Green boxes indicate sequences with putative excision footprints other than the widespread TA...GTA footprint (Fig. 1). The blue and green box indicates an insertion next to an existing footprint. Yellow boxes indicate sequences lacking the element along with portions of the flanking intron.