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20 results for “Lachemilla”
Data from: Phylogeny and evolution of the neotropical radiation of Lachemilla (Rosaceae): uncovering a history of reticulate evolution and implications for infrageneric classification
Reticulate evolution often leads to incongruence between nuclear and plastid phylogenies and comparisons between them have been used as a first approximation to disentangle patterns of hybridization. Because other processes like incomplete lineage sorting and phylogenetic error also produce similar incongruence patterns, additional sources of evidence must be incorporated. Here we focus on reconstructing the phylogeny of genus Lachemilla using nuclear ribosomal ITS and plastid trnL-F DNA sequences, and explore widespread patterns of cytonuclear discordance in this group. Lachemilla is a highly morphologically variable group of perennial herbs and shrubs, and a nearly ubiquitous member of the diverse Neotropical high-altitude grasslands. Our analyses identified four major clades within Lachemilla that are in part congruent with previous morphological classifications of the group. Furthermore, using multiple sources of evidence, including a procrustean approach to cophylogeny estimation, coalescent-based simulations, phylogenetic networks, chromosome counts, and genome size estimations, we also revealed a large-scale pattern of incongruence between the plastid and nuclear phylogenies in Lachemilla, which is mainly the result of widespread hybridization and polyploidy. We also estimated that the origin of Lachemilla in South America (~14.5 mya) predates the "rapid-uplift" diversification model that has been suggested for other high species-richness Andean plant clades, but following the formation of the high-elevation Andean grasslands during the last 5 mya, a rapid accumulation of particular nested lineages occurred has contributed to the ubiquitous presence of Lachemilla in these biomes.
Data from: Phylogenomic analyses reveal a deep history of hybridization and polyploidy in the Neotropical genus Lachemilla (Rosaceae)
Hybridization, incomplete lineage sorting, and phylogenetic error produce similar incongruence patterns, representing a great challenge for phylogenetic reconstruction. Here, we use sequence capture data and multiple species tree and species network approaches to resolve the backbone phylogeny of the Neotropical genus Lachemilla, while distinguishing among sources of incongruence. We used 396 nuclear loci and nearly complete plastome sequences from 27 species to clarify the relationships among the major groups of Lachemilla, and explored multiple sources of conflict between gene trees and species trees inferred with a plurality of approaches. All phylogenetic methods recovered the four major groups previously proposed for Lachemilla, but species tree methods recovered different topologies for relationships between these four clades. Species network analyses revealed that one major clade, Orbiculate, is likely of ancient hybrid origin, representing one of the main sources of incongruence among the species trees. Additionally, we found evidence for a potential whole genome duplication event shared by Lachemilla and allied genera. Lachemilla shows clear evidence of ancient and recent hybridization throughout the evolutionary history of the group. Also, we show the necessity to use phylogenetic network approaches that can simultaneously accommodate incomplete lineage sorting and gene flow when studying groups that show patterns of reticulation.
Data from: Phylogeny and evolution of the neotropical radiation of Lachemilla (Rosaceae): uncovering a history of reticulate evolution and implications for infrageneric classification
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Data from: Extensive allopolyploidy in the neotropical genus Lachemilla (Rosaceae) revealed by PCR ‐based target enrichment of the nuclear ribosomal DNA cistron and plastid phylogenomics
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Data from: Phylogenomic analyses reveal a deep history of hybridization and polyploidy in the Neotropical genus Lachemilla (Rosaceae)
Open the record for dataset details and reuse information.
Figure 3 from: Morales-Briones DF, Romoleroux K, Tank DC (2019) Three new species of Lachemilla (Rosaceae) from South America. PhytoKeys 127: 93-119. https://doi.org/10.3897/phytokeys.127.36324
Figure 3 Lachemillarothmaleriana. A Habit B stem, apical leaves C stem, basal leaves D flowering branch E flower. Illustration by S. Cordero.
Figure 7 from: Morales-Briones DF, Romoleroux K, Tank DC (2019) Three new species of Lachemilla (Rosaceae) from South America. PhytoKeys 127: 93-119. https://doi.org/10.3897/phytokeys.127.36324
Figure 7 Lachemillaargentea. A Habit B basal leaf C stem, apical leaves D flower E flowering branch. Illustration by C. Rodríguez.
Figure 10 from: Morales-Briones DF, Romoleroux K, Tank DC (2019) Three new species of Lachemilla (Rosaceae) from South America. PhytoKeys 127: 93-119. https://doi.org/10.3897/phytokeys.127.36324
Figure 10 Lachemillacyanea. A Habit B basal leaf C flowering branch D flower. Illustration by C. Rodríguez.
Figure 1 from: Morales-Briones DF, Romoleroux K, Tank DC (2019) Three new species of Lachemilla (Rosaceae) from South America. PhytoKeys 127: 93-119. https://doi.org/10.3897/phytokeys.127.36324
Figure 1 Bayesian 50% majority rule consensus tree of the cpDNA dataset. Posterior probabilities and transfer bootstrap expectation support values are shown above and below the branches, respectively.
Figure 2 from: Morales-Briones DF, Romoleroux K, Tank DC (2019) Three new species of Lachemilla (Rosaceae) from South America. PhytoKeys 127: 93-119. https://doi.org/10.3897/phytokeys.127.36324
Figure 2 Bayesian 50% majority rule consensus tree of the nrDNA dataset. Posterior probabilities and transfer bootstrap expectation support values are shown above and below the branches, respectively.
Figure 9 from: Morales-Briones DF, Romoleroux K, Tank DC (2019) Three new species of Lachemilla (Rosaceae) from South America. PhytoKeys 127: 93-119. https://doi.org/10.3897/phytokeys.127.36324
Figure 9 Lachemillaargentea. Isotype collection: Morales-Briones D.F. & Uribe-Convers S. 523 (QCA).
Figure 6 from: Morales-Briones DF, Romoleroux K, Tank DC (2019) Three new species of Lachemilla (Rosaceae) from South America. PhytoKeys 127: 93-119. https://doi.org/10.3897/phytokeys.127.36324
Figure 6 Geographic distribution of Lachemillarothmaleriana (read triangles), L.argentea (black circles), and L.cyanea (cyan rectangle).
Figure 12 from: Morales-Briones DF, Romoleroux K, Tank DC (2019) Three new species of Lachemilla (Rosaceae) from South America. PhytoKeys 127: 93-119. https://doi.org/10.3897/phytokeys.127.36324
Figure 12 Lachemillacyanea. Isotype collection: Morales-Briones D.F. & Uribe-Convers S. 246 (QCA).
Figure 5 from: Morales-Briones DF, Romoleroux K, Tank DC (2019) Three new species of Lachemilla (Rosaceae) from South America. PhytoKeys 127: 93-119. https://doi.org/10.3897/phytokeys.127.36324
Figure 5 Lachemillarothmaleriana. Isotype collection: Morales-Briones D.F. & Uribe-Convers S. 506. (QCA).
Figure 1 from: Morales-Briones DF (2016) Lachemilla mexiquense (Rosaceae), a new species from Mexico. PhytoKeys 62: 25-32. https://doi.org/10.3897/phytokeys.62.7953
Figure 1 - Lachemilla mexiquense. A Habit B Basal leaf and stipule C Flowering branch D Flower. Illustration by P. Lu-Irving.
Figure 11 from: Morales-Briones DF, Romoleroux K, Tank DC (2019) Three new species of Lachemilla (Rosaceae) from South America. PhytoKeys 127: 93-119. https://doi.org/10.3897/phytokeys.127.36324
Figure 11 Lachemillacyanea. A Habit B flowering branch.
Figure 8 from: Morales-Briones DF, Romoleroux K, Tank DC (2019) Three new species of Lachemilla (Rosaceae) from South America. PhytoKeys 127: 93-119. https://doi.org/10.3897/phytokeys.127.36324
Figure 8 Lachemillaargentea. A Habit B basal leaves C flowering branch.
Figure 4 from: Morales-Briones DF, Romoleroux K, Tank DC (2019) Three new species of Lachemilla (Rosaceae) from South America. PhytoKeys 127: 93-119. https://doi.org/10.3897/phytokeys.127.36324
Figure 4 Lachemillarothmaleriana. A Habit B stems C flowering branch.
Figure 3 from: Morales-Briones DF (2016) Lachemilla mexiquense (Rosaceae), a new species from Mexico. PhytoKeys 62: 25-32. https://doi.org/10.3897/phytokeys.62.7953
Figure 3 - Geographic distribution of Lachemilla mexiquense.
Figure 2 from: Morales-Briones DF (2016) Lachemilla mexiquense (Rosaceae), a new species from Mexico. PhytoKeys 62: 25-32. https://doi.org/10.3897/phytokeys.62.7953
Figure 2 - Lachemilla mexiquense. A Habit B Type locality.
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