A phylogenomic analysis of the so far phylogenetically unresolved subfamily Bromelioideae (Bromeliaceae) was performed to infer species relationships as the basis for future taxonomic treatment, stabilization of generic concept, and further analyses of evolution and biogeography of the subfamily. A target‐enrichment approach was chosen, using the Angiosperms353 v.4 kit RNA‐baits and including 86 Bromelioideae species representing previously identified major evolutionary lineages. Phylogenetic analyses were based on 125 target nuclear loci, assembled off‐target plastome as well as mitogenome reads. A Bromelioideae phylogeny with a mostly well‐resolved backbone is provided based on nuclear (194 kbp), plastome (109 kbp), and mitogenome data (34 kbp). For the nuclear markers, a coalescent‐based analysis of single‐locus gene trees was performed as well as a supermatrix analysis of concatenated gene alignments. Nuclear and plastome datasets provide well‐resolved trees, which showed only minor topological incongruences. The mitogenome tree is not sufficiently resolved. A total of 26 well‐supported clades were identified. The genera
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Abstract Aechmea ,Canistrum ,Hohenbergia ,Neoregelia , andQuesnelia were revealed polyphyletic. In core Bromelioideae,Acanthostachys is sister to the remainder. Among the 26 recognized clades, 12 correspond with currently employed taxonomic concepts. Hence, the presented phylogenetic framework will serve as an important basis for future taxonomic revisions as well as to better understand the evolutionary drivers and processes in this exciting subfamily. -
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Abstract Aim We investigate the evolutionary mechanisms that allow morphologically convergent lineages to share the same geographical space. We compared the evolutionary events that occurred along the diversification of
Karawata andAechmea subgen.Chevaliera in the Atlantic Forest by (a) verifying whether the climatic niches and habitats ofKarawata andChevaliera are similar; (b) testing whether the two groups had the same pattern of colonization in the Atlantic Forest; and (c) evaluating whether they had the same evolutionary dynamics of environmental space occupation.Location Brazilian Atlantic Forest
Taxon Karawata andAechmea subgen.Chevaliera (Bromeliaceae: Bromelioideae)Methods We explored differences in evolutionary dynamics between
Karawata andChevaliera by (a) analyzing their divergence times using Bayesian inference with a relaxed molecular clock; (b) estimating ancestral ranges and habitats with Dispersion Extinction Cladogenesis Lagrange and Statistical Dispersal Vicariance analyses; (c) testing climatic niche similarity, equivalency and overlap using principal component analysis; and, (d) evaluating shifts in speciation dynamics using Bayesian Analysis of Macroevolutionary Mixtures.Results Karawata andChevaliera most likely originated in the Pliocene and diversified during the Pleistocene. The two clades originated in ombrophilous forests and shared a similar environmental space. However,Karawata andChevaliera show different dynamics in the occupation of geographical and environmental spaces.Main Conclusions Our results suggest that the São Francisco and Jequitinhonha Rivers acted as geographical barriers for
Karawata andChevaliera . Differences in spatial and environmental evolutionary dynamics have allowed the two groups to occupy similar habitats as well as environmental and geographical spaces in the Brazilian Atlantic Forest.
