Ribosomal DNA: Molecular Evolution and Phylogenetic Inference

1991 ◽  
Vol 66 (4) ◽  
pp. 411-453 ◽  
Author(s):  
David M. Hillis ◽  
Michael T. Dixon
Keyword(s):  
Molecular Evolution ◽  
Ribosomal Dna ◽  
Phylogenetic Inference

scholarly journals Euphorbia mbuinzauensis, a new succulent species in Kenya from the Synadenium group in Euphorbia sect. Monadenium (Euphorbiaceae)

PhytoKeys ◽  
2021 ◽  
Vol 183 ◽  
pp. 21-35
Author(s):  
Neng Wei ◽  
Fredrick Munyao Mutie ◽  
Geoffrey Mwachala ◽  
Olwen M. Grace ◽  
Guang-Wan Hu ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Ribosomal Dna ◽  
Phylogenetic Inference ◽  
Distinct Species ◽  
Nuclear Ribosomal Dna ◽  
Molecular Phylogenetic Analysis ◽  
Molecular Phylogenetic ◽  
Smooth Margin ◽  
Iucn Criteria

Euphorbia mbuinzauensis, a succulent new species of the Synadenium group in Euphorbiaceae from Makueni County, Kenya, is described and illustrated. Morphologically, it is most similar to E. pseudomollis, but differs mainly by its shrubby habit (up to 4 m), abaxial leaves surfaces with densely stellate hairs, 2–4-forked cymes, smaller bracts (ca. 2.5 × 3.0 mm), smaller cyathia (6 mm wide), crimson glands without narrow smooth margin, smaller fruits (ca. 8 × 7 mm) and ovoid seeds (ca. 1.8 × 2.2 mm). Furthermore, we performed a molecular phylogenetic analysis of the Synadenium group in Euphorbia sect. Monadenium, based on complete nuclear ribosomal DNA (nrDNA) datasets. This phylogenetic inference also supports it to be a distinct species. The new species is assessed as Endangered using the IUCN criteria.

On the shoulder of giants: Mitogenome recovery from non‐targeted genome projects for phylogenetic inference and molecular evolution studies

2020 ◽  
Vol 59 (1) ◽  
pp. 5-30
Author(s):  
Silvia Adrián‐Serrano ◽  
Jesus Lozano‐Fernandez ◽  
Joan Pons ◽  
Julio Rozas ◽  
Miquel A. Arnedo
Keyword(s):  
Molecular Evolution ◽  
Phylogenetic Inference ◽  
Genome Projects

Phytogeny and evolution of Caliciaceae, Mycocaliciaceae, and Sphinctrinaceae (Ascomycota), with notes on the evolution of the prototunicate ascus

1997 ◽  
Vol 75 (8) ◽  
pp. 1236-1242 ◽  
Author(s):  
Mats Wedin ◽  
Leif Tibell
Keyword(s):  
Molecular Evolution ◽  
Ribosomal Dna ◽  
Sister Group ◽  
Small Subunit ◽  
Monophyletic Group ◽  
Maximum Parsimony Analysis ◽  
Sister Group Relationship ◽  
Parsimony Analysis ◽  
Small Subunit Ribosomal Dna ◽  
Jackknife Support

Small subunit ribosomal DNA has been sequenced from seven members of the ascomycete order Caliciales s.l. (Calicium adspersum, Cyphelium inquinans, Texosporium sancti-jacobi, and Thelomma mammosum (Caliciaceae), Chaenothecopsis savonica and Stenocybe pullatula (Mycocaliciaceae), and Sphinctrina turbinata (Sphinctrinaceae)), included in a matrix of 58 homologous ascomycete sequences and analysed with maximum parsimony analysis. The result shows the Caliciaceae to be a strongly supported monophyletic group within the Lecanorales s.l., although the jackknife support for a monophyletic Lecanorales is low. Mycocaliciaceae and Sphinctrinaceae form a well-supported monophyletic group, grouping with representatives of Eurotiales and Onygenales. This larger group is the sister group to Lecanorales, but the support for this sister-group relationship and the monophyly of the group consisting of Mycocaliciaceae–Sphinctrinaceae and Eurotiales–Onygenales is low. The evolution of the prototunicate ascus is discussed, and it is concluded that there is neither any evidence for a monophyletic Caliciales s.l., nor for the suggested group "Euascomycetideae" sensu Tehler, with the prototunicate Caliciales being the sister group to the rest of the true ascomycetes. Prototunicate asci are shown to have reappeared at least four times in the evolution of the ascomycetes. Key words: Ascomycetes, lichens, molecular evolution, phylogeny, ribosomal DNA, 18S rDNA.

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