scholarly journals A phylum-wide survey reveals multiple independent gains of head regeneration in Nemertea

2019 ◽  
Vol 286 (1898) ◽  
pp. 20182524 ◽  
Author(s):  
Eduardo E. Zattara ◽  
Fernando A. Fernández-Álvarez ◽  
Terra C. Hiebert ◽  
Alexandra E. Bely ◽  
Jon L. Norenburg
Keyword(s):  
Evolutionary History ◽  
Sequence Data ◽  
Ability To Regenerate ◽  
History Of ◽  
Phylogenetic Framework ◽  
Regenerative Ability ◽  
Head Regeneration

Animals vary widely in their ability to regenerate, suggesting that regenerative ability has a rich evolutionary history. However, our understanding of this history remains limited because regenerative ability has only been evaluated in a tiny fraction of species. Available comparative regeneration studies have identified losses of regenerative ability, yet clear documentation of gains is lacking. We assessed ability to regenerate heads and tails either through our own experiments or from literature reports for 35 species of Nemertea spanning the diversity of the phylum, including representatives of 10 families and all three orders. We generated a phylogenetic framework using sequence data to reconstruct the evolutionary history of head and tail regenerative ability across the phylum and found that all evaluated species can remake a posterior end but surprisingly few could regenerate a complete head. Our analysis reconstructs a nemertean ancestor unable to regenerate a head and indicates independent gains of head regenerative ability in at least four separate lineages, with one of these gains taking place as recently as the last 10–15 Myr. Our study highlights nemerteans as a valuable group for studying evolution of regeneration and identifying mechanisms associated with repeated gains of regenerative ability.

scholarly journals A phylum-wide survey reveals multiple independent gains of head regeneration ability in Nemertea

2018 ◽  
Author(s):  
Eduardo E. Zattara ◽  
Fernando A. Fernández-Álvarez ◽  
Terra C. Hiebert ◽  
Alexandra E. Bely ◽  
Jon L. Norenburg
Keyword(s):  
Evolutionary History ◽  
Sequence Data ◽  
Regeneration Ability ◽  
Tail Regeneration ◽  
Diverse Families ◽  
Ability To Regenerate ◽  
History Of ◽  
Phylogenetic Framework ◽  
Regenerative Ability ◽  
Head Regeneration

AbstractAnimals vary widely in their ability to regenerate, suggesting that regenerative abilities have a rich evolutionary history. However, our understanding of this history remains limited because regeneration ability has only been evaluated in a tiny fraction of species. Available comparative regeneration studies have identified losses of regenerative ability, yet clear documentation of gains is lacking. We surveyed regenerative ability in 34 species spanning the phylum Nemertea, assessing the ability to regenerate heads and tails either through our own experiments or from literature reports. Our sampling included representatives of the 10 most diverse families and all three orders comprising this phylum. We generated a phylogenetic framework using sequence data to reconstruct the evolutionary history of head and tail regeneration ability across the phylum and found that while all evaluated species can remake a posterior end, surprisingly few could regenerate a complete head. Our analysis reconstructs a nemertean ancestor unable to regenerate a head and indicates at least four separate lineages have independently gained head regeneration ability, one such gains reconstructed as taking place within the last 10-15 mya. Our study highlights nemerteans as a valuable group for studying evolution of regeneration and identifying mechanisms associated with repeated gains of regenerative ability.

Molecular Systematics of Tribe Physarieae (Brassicaceae) Based on Nuclear ITS, LUMINIDEPENDENS, and Chloroplast ndhF

2021 ◽  
Author(s):  
Sara Fuentes-Soriano ◽  
Elizabeth A. Kellogg
Keyword(s):  
Sequence Data ◽  
Plastid Dna ◽  
Sister Relationship ◽  
Data Set ◽  
Woody Perennial ◽  
History Of ◽  
Nuclear Its ◽  
Phylogenetic Framework ◽  
Phylogenetic Hypotheses ◽  
Relationship Of

Physarieae is a small tribe of herbaceous annual and woody perennial mustards that are mostly endemic to North America, with its members including a large amount of variation in floral, fruit, and chromosomal variation. Building on a previous study of Physarieae based on morphology and ndhF plastid DNA, we reconstructed the evolutionary history of the tribe using new sequence data from two nuclear markers, and compared the new topologies against previously published cpDNA-based phylogenetic hypotheses. The novel analyses included ca. 420 new sequences of ITS and LUMINIDEPENDENS (LD) markers for 39 and 47 species, respectively, with sampling accounting for all seven genera of Physarieae, including nomenclatural type species, and 11 outgroup taxa. Maximum parsimony, maximum likelihood, and Bayesian analyses showed that these additional markers were largely consistent with the previous ndhF data that supported the monophyly of Physarieae and resolved two major clades within the tribe, i.e., DDNLS (Dithyrea, Dimorphocarpa, Nerisyrenia, Lyrocarpa, and Synthlipsis)and PP (Paysonia and Physaria). New analyses also increased internal resolution for some closely related species and lineages within both clades. The monophyly of Dithyrea and the sister relationship of Paysonia to Physaria was consistent in all trees, with the sister relationship of Nerisyrenia to Lyrocarpa supported by ndhF and ITS, and the positions of Dimorphocarpa and Synthlipsis shifted within the DDNLS Clade depending on the employed data set. Finally, using the strong, new phylogenetic framework of combined cpDNA + nDNA data, we discussed standing hypotheses of trichome evolution in the tribe suggested by ndhF.

scholarly journals Genome-scale DNA sequence data and the evolutionary history of placental mammals

Data in Brief ◽  
2018 ◽  
Vol 18 ◽  
pp. 1972-1975 ◽  
Author(s):  
Shaoyuan Wu ◽  
Scott Edwards ◽  
Liang Liu
Keyword(s):  
Dna Sequence ◽  
Evolutionary History ◽  
Sequence Data ◽  
Dna Sequence Data ◽  
History Of ◽  
Genome Scale

scholarly journals Complex Evolutionary History of the Aeromonas veronii Group Revealed by Host Interaction and DNA Sequence Data

PLoS ONE ◽  
2011 ◽  
Vol 6 (2) ◽  
pp. e16751 ◽  
Author(s):  
Adam C. Silver ◽  
David Williams ◽  
Joshua Faucher ◽  
Amy J. Horneman ◽  
J. Peter Gogarten ◽  
...  
Keyword(s):  
Dna Sequence ◽  
Evolutionary History ◽  
Sequence Data ◽  
Dna Sequence Data ◽  
Aeromonas Veronii ◽  
Host Interaction ◽  
History Of ◽  
Complex Evolutionary History

scholarly journals The diverging evolutionary history of opsin genes in Diptera

2020 ◽  
Author(s):  
Roberto Feuda ◽  
Matthew Goulty ◽  
Nicola Zadra ◽  
Tiziana Gasparetti ◽  
Ezio Rosato ◽  
...  
Keyword(s):  
Evolutionary History ◽  
Turnover Rate ◽  
Selective Pressure ◽  
Ecological Factors ◽  
Peculiar Behaviour ◽  
Opsin Genes ◽  
History Of ◽  
Phylogenetic Framework ◽  
Independent Expansion ◽  
Dipteran Species

AbstractOpsin receptors mediate the visual process in animals and their evolutionary history can provide precious hints on the ecological factors that underpin their diversification. Here we mined the genomes of more than 60 Dipteran species and reconstructed the evolution of their opsin genes in a phylogenetic framework. Our phylogenies indicate that dipterans possess an ancestral set of five core opsins which have undergone several lineage-specific events including an independent expansion of low wavelength opsins in flies and mosquitoes and numerous family specific duplications and losses. Molecular evolutionary studies indicate that gene turnover rate, overall mutation rate, and site-specific selective pressure are higher in Anopheles than in Drosophila; we found signs of positive selection in both lineages, including events possibly associated with their peculiar behaviour. Our findings indicate an extremely variable pattern of opsin evolution in dipterans, showcasing how two similarly aged radiations - Anopheles and Drosophila - can be characterized by contrasting dynamics in the evolution of this gene family.

Evolution of Buchloë dactyloides based on cloning and sequencing of matK, rbcL, and cob genes from plastid and mitochondrial genomes

Genome ◽  
2005 ◽  
Vol 48 (3) ◽  
pp. 411-416 ◽  
Author(s):  
Hikmet Budak ◽  
Robert C Shearman ◽  
Ismail Dweikat
Keyword(s):  
Evolutionary History ◽  
Sequence Data ◽  
Evolutionary Process ◽  
Mitochondrial Genomes ◽  
Sequence Information ◽  
Specific Marker ◽  
Buchloe Dactyloides ◽  
A Genome ◽  
Organelle Genomes ◽  
History Of

Buffalograss (Buchloë dactyloides (Nutt.) Englem), a C4 turfgrass species, is native to the Great Plains region of North America. The evolutionary implications of buffalograss are unclear. Sequencing of rbcL and matK genes from plastid and the cob gene from mitochondrial genomes was examined to elucidate buffalograss evolution. This study is the first to report sequencing of these genes from organelle genomes in the genus Buchloë. Comparisons of sequence data from the mitochondrial and plastid genome revealed that all genotypes contained the same cytoplasmic origin. There were some rearrangements detected in mitochondrial genome. The buffalograss genome appears to have evolved through the rearrangements of convergent subgenomic domains. Combined analyses of plastid genes suggest that the evolutionary process in Buchloë accessions studied was monophyletic rather than polyphyletic. However, since plastid and mitochondrial genomes are generally uniparentally inherited, the evolutionary history of these genomes may not reflect the evolutionary history of the organism, especially in a species in which out-crossing is common. The sequence information obtained from this study can be used as a genome-specific marker for investigation of the buffalograss polyploidy complex and testing of the mode of plastid and mitochondrial transmission in genus Buchloë.Key words: buffalograss, evolution, organelle genomes, turfgrass.

scholarly journals Reconciliation of Sequence Data and Updated Annotation of the Genome of Agrobacterium tumefaciens C58, and Distribution of a Linear Chromosome in the Genus Agrobacterium

2012 ◽  
Vol 79 (4) ◽  
pp. 1414-1417 ◽  
Author(s):  
Steven Slater ◽  
João C. Setubal ◽  
Brad Goodner ◽  
Kathryn Houmiel ◽  
Jian Sun ◽  
...  
Keyword(s):  
Agrobacterium Tumefaciens ◽  
Evolutionary History ◽  
Sequence Data ◽  
Additional Analysis ◽  
Linear Chromosome ◽  
Content Type ◽  
History Of ◽  
Agrobacterium Tumefaciens C58

ABSTRACTTwo groups independently sequenced theAgrobacterium tumefaciensC58 genome in 2001. We report here consolidation of these sequences, updated annotation, and additional analysis of the evolutionary history of the linear chromosome, which is apparently limited to the biovar I group ofAgrobacterium.

scholarly journals Inferring the Evolutionary History of Vibrios by Means of Multilocus Sequence Analysis

2007 ◽  
Vol 189 (21) ◽  
pp. 7932-7936 ◽  
Author(s):  
Tomoo Sawabe ◽  
Kumiko Kita-Tsukamoto ◽  
Fabiano L. Thompson
Keyword(s):  
Sequence Analysis ◽  
Evolutionary History ◽  
Gene Sequence ◽  
Sequence Data ◽  
Sequence Similarity ◽  
Housekeeping Genes ◽  
Amino Acid Identity ◽  
Multilocus Sequence Analysis ◽  
Protein Coding ◽  
History Of

ABSTRACT We performed the first broad study aiming at the reconstruction of the evolutionary history of vibrios by means of multilocus sequence analysis of nine genes. Overall, 14 distinct clades were recognized using the SplitsTree decomposition method. Some of these clades may correspond to families, e.g., the clades Salinivibrio and Photobacteria, while other clades, e.g., Splendidus and Harveyi, correspond to genera. The common ancestor of all vibrios was estimated to have been present 600 million years ago. We can define species of vibrios as groups of strains that share >95% gene sequence similarity and >99.4% amino acid identity based on the eight protein-coding housekeeping genes. The gene sequence data were used to refine the standard online electronic taxonomic scheme for vibrios (http://www.taxvibrio.lncc.br ).

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