Fig. 2: ERVK solo-LTRs accumulate during speciation events in Passeriformes.
From: Adaptive expansion of ERVK solo-LTRs is associated with Passeriformes speciation events
a Phylogenetic tree illustrating the proportion of ERVK solo-LTRs in 362 bird species. Branches correspond to different species; from top to bottom, the branches above the five gray dashed lines correspond to species in Passerida, Passerides, Passeri, Passeriformes, and Neognathae, respectively. Based on the B10K family-level bird phylogeny. b ERVK solo-LTRs positively correlated with the number of speciation events in Passeriformes. c The positive correlation can also be observed in the parvorder Passerida. Each dot represents a species and each color of dots represents a clade of birds (n = 169, 41, 20, 33, and 30 for Passeriformes, Passerida, Muscicapida, Sylviida and Corvides, respectively). Speciation events were measured as the number of nodes along a path from the Passeriformes ancestor node to the tips of each species, based on B10K family-level bird phylogeny. Colored regions indicate the 95% confidence interval for each regression line in (b, c). Correlation analysis was performed by using Pearson correlation at 95% confidence interval. Source data are provided as a Source Data file.
