Molecular phylogenetics and molecular clock dating of Sapindales based on plastid rbcL, atpB and trnL-trnF DNA sequences

Taxon ◽  
2016 ◽  
Vol 65 (5) ◽  
pp. 1019-1036 ◽  
Author(s):  
Alexandra N. Muellner-Riehl ◽  
Andrea Weeks ◽  
Joshua W. Clayton ◽  
Sven Buerki ◽  
Lars Nauheimer ◽  
...  
Keyword(s):  
Molecular Clock ◽  
Dna Sequences ◽  
Molecular Phylogenetics ◽  
Molecular Clock Dating

The fossil record of Phasmida (Insecta: Neoptera)

2000 ◽  
Vol 31 (4) ◽  
pp. 473-480 ◽  
Author(s):  
Erich Tilgner
Keyword(s):  
Dominican Republic ◽  
Molecular Clock ◽  
Fossil Record ◽  
Sister Group ◽  
Baltic Amber ◽  
Molecular Clock Dating

AbstractA review of the Phasmida fossil record is provided. No fossils of Timema Scudder are known. Euphasmida fossils include: Agathemera reclusa Scudder, Electrobaculum gracilis Sharov, Eophasma oregonense Sellick, Eophasma minor Sellick, Eophasmina manchesteri Sellick, Pseudoperla gracilipes Pictet, Pseudoperla lineata Pictet and various unclassified species from Grube Messel, Baltic amber, and Dominican Republic amber. The oldest documented Euphasmida fossils are 44-49 million years old; molecular clock dating underestimates the origin of the sister group Timema by at least 24 million years.

scholarly journals Comparing Medicinal Uses of Cochlospermaceae throughout Its Geographic Range with Insights from Molecular Phylogenetics

Diversity ◽  
2018 ◽  
Vol 10 (4) ◽  
pp. 123 ◽  
Author(s):  
Susannah Johnson-Fulton ◽  
Linda Watson
Keyword(s):  
Bioactive Compounds ◽  
Dna Sequences ◽  
Related Species ◽  
Molecular Phylogenetics ◽  
Closely Related Species ◽  
Active Compounds ◽  
Medicinal Uses ◽  
Continental Scale ◽  
Chloroplast Markers ◽  
Geographic Regions

Species of the Cochlospermaceae, a small mostly pantropical plant family, were evaluated at a continental scale for medicinal uses in traditional medicine. This ethnobotanical information was placed in a phylogenetic framework to make informed predictions in the search for new medicines and bioactive compounds. Medicinal plant-use data were mapped onto a molecular phylogeny based on DNA sequences of nuclear and chloroplast markers. Associations of medicinal uses among closely related species occurring in different geographic regions and among diverse cultures were evaluated. The most common medicinal uses for these species are those used to treat skin ailments, gastro-intestinal problems, malaria, and liver issues. The plant species with the most numerous uses is Cochlospermum tinctorium, which occurs primarily in West Africa. Closely related species being used by cultural groups in different geographic regions to treat the same illnesses suggests the presence of bioactive compounds with potential biomedical value, since they may represent independent discoveries of similar medicinally-active compounds. This leads to the speculation that those closely related species not currently being used to treat these ailments may also contain identical or similar medicinally-active compounds and are worthy of laboratory investigations.

scholarly journals Bayesian molecular clock dating of species divergences in the genomics era

2015 ◽  
Vol 17 (2) ◽  
pp. 71-80 ◽  
Author(s):  
Mario dos Reis ◽  
Philip C. J. Donoghue ◽  
Ziheng Yang
Keyword(s):  
Molecular Clock ◽  
Molecular Clock Dating

Molecular phylogenetics of the Australian acacias of subg. Phyllodineae (Fabaceae: Mimosoideae) based on the trnK intron

2003 ◽  
Vol 51 (2) ◽  
pp. 167 ◽  
Author(s):  
Joseph T. Miller ◽  
Rose Andrew ◽  
Randall J. Bayer
Keyword(s):  
Dna Sequences ◽  
Molecular Phylogenetics ◽  
Sequence Divergence ◽  
Large Numbers ◽  
Close Relationship ◽  
Trnk Intron ◽  
Species Groups ◽  
Morphological Species ◽  
Sectional Classification ◽  
Relationship Of

With over 960 species, Acacia is the largest genus of plants in Australia with all but nine of these species classified as subgenus Phyllodineae. DNA sequences for the chloroplast trnK region were sequenced for over 100 species to test sectional classification and survey species relationships within this subgenus. Only one of the seven recognised sections was found to be monophyletic; however, the close relationship of sect. Botrycephalae to certain racemose, uninerved species of sect. Phyllodineae is confirmed. Support is found for an expanded version of Vassal's Pulchelloidea, with the addition of sect. Lycopodiifoliae and several members of sect. Phyllodineae. These species, while morphologically distinct in adult foliage, possess similar seedling characteristics. The multinerved species are unresolved, indicating a rapid morphological radiation with little chloroplast sequence divergence among these species. The low levels of sequence divergence, large numbers of morphological species groups and the adaptive radiation of the group are discussed.

scholarly journals ULASAN Kajian Filogenetika Molekuler dan Peranannya dalam Menyediakan Informasi Dasar untuk Meningkatkan Kualitas Sumber Genetik Anggrek

2016 ◽  
Vol 4 (1) ◽  
pp. 35 ◽  
Author(s):  
Topik Hidayat ◽  
Adi Pancoro
Keyword(s):  
Dna Sequences ◽  
Molecular Phylogenetics ◽  
Phylogenetic Analyses ◽  
Molecular Data ◽  
Biochemical Properties ◽  
Intergeneric Hybrids ◽  
Basic Knowledge ◽  
Phylogenetic Studies ◽  
Molecular Phylogenetic ◽  
Ornamental Crops

<p>Early information<br />resulted from molecular phylogenetic studies of many important<br />ornamental crops is often less attention to many<br />growers and farmers. Phylogenetics is one of the most preferable<br />method in systematics to reconstruct evolutionary<br />relationships of groups of biological organisms in order to<br />understand their biodiversities. This has been revolutionized<br />by DNA sequences data. In this method, a group of organisms<br />that shares many identical characteristics are considered<br />to be closely related; deriving from a common<br />ancestor and is assumed to have similar genetic patterns<br />and biochemical properties. By these basic principles,<br />molecular phylogenetics plays important roles in revealing a<br />basic knowledge on pattern of relationships to which<br />genetic resources can be improved. Over the past decade,<br />botanists have done several thousand phylogenetic analyses<br />based on molecular data of economically and horticulturally<br />important crops. Orchids are the best example for this.<br />There is no doubt that most orchid plants had played roles in<br />horticulture and hybridization. At present, many infrageneric<br />and intergeneric hybrids are available commercially. Successful<br />hybridization can be achieved if two or more individual<br />plants understudy are closely related in respect to their<br />genetics and evolution.</p>

scholarly journals Evolution of ribosomal internal transcribed spacers in Deuterostomia

2017 ◽  
Author(s):  
Alexandr Dyomin ◽  
Valeria Volodkina ◽  
Elena Koshel ◽  
Svetlana Galkina ◽  
Alsu Saifitdinova ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Molecular Phylogenetics ◽  
Mobile Genetic Element ◽  
Gc Content ◽  
Internal Transcribed Spacers ◽  
General Tendency ◽  
Ltr Retrotransposon ◽  
Content Increase ◽  
Evolutionary Changes

AbstractSequences of ribosomal internal transcribed spacers (ITSs) are of great importance to molecular phylogenetics and DNA barcoding, but remain unstudied in some large taxa of Deuterostomia. We have analyzed complete ITS1 and ITS2 sequences in 62 species from 16 Deuterostomia classes, with ITSs sequences in 24 species from 11 classes initially obtained using unannotated contigs and raw read sequences. A general tendency for both ITS length and GC-content increase from interior to superior Deuterostomia taxa, a uniform GC-content in both ITSs within the same species, thymine content decrease in sense DNA sequences of both ITSs are shown. A possible role of GC-based gene conversion in Deuterostomia ITSs evolutionary changes is hypothesized. The first example of non-LTR retrotransposon insertion into ITS sequence in Deuterostomia is described in turtle Geochelone nigra. The roles of mobile genetic element insertions in the evolution of ITS sequences in some Sauropsida taxa are discussed as well.

Molecular phylogenetics ofHymenocraterand allies (Lamiaceae): new insights from nrITS, plastidtrnLintron andtrnL-Fintergenic spacer DNA sequences

2017 ◽  
Vol 36 (1_2) ◽  
pp. njb-01600
Author(s):  
Fariba Serpooshan ◽  
Ziba Jamzad ◽  
Taher Nejadsattari ◽  
Iraj Mehregan
Keyword(s):  
Dna Sequences ◽  
Molecular Phylogenetics ◽  
Spacer Dna
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