Molecular phylogeny of the genus Luzula DC. (Juncaceae, Monocotyledones) based on plastome and nuclear ribosomal regions: A case of incongruence, incomplete lineage sorting and hybridisation.
Summary of "Molecular phylogeny of the genus Luzula DC. (Juncaceae, Monocotyledones) based on plastome and nuclear ribosomal regions: A case of incongruence, incomplete lineage sorting and hybridisation."
The genus Luzula consists of 115 species distributed throughout the world. Luzula is monophyletic, but species relationships within the genus are difficult to determine primarily due to the similar morphology even within geographically remote taxa (especially within the section Luzula). The plastome trnL intron, trnL-F intergenic spacer and the nuclear ribosomal ITS1-5.8S-ITS2 regions were analysed using maximum parsimony and maximum likelihood reconstruction in 93 species of Luzula. The incongruent phylogenetic signals obtained from the chloroplast and the nuclear genomes point to incomplete lineage sorting as well as recent hybridisation in this group. Although tree-building analyses revealed several well-supported lineages, the outcomes for many groups were ambiguous. In the total evidence tree, Luzula species were grouped within six main clades (1. subg. Marlenia, 2. subg. Pterodes except for L. pilosa, 3. sections Anthelaea and Nodulosae, 4. sections Diprophyllatae and Thyrsanochlamydeae, 5. sect. Alpinae except for a few species and 6. sect. Luzula). The subgenus Marlenia occupies the early derived lineage within the genus Luzula. The traditionally accepted subgenera Pterodes and Luzula (and its sections) appear to be non-monophyletic. A statistical parsimony network approach showed that ancient haplotypes and ribotypes co-occur with their descendants in Luzula. Furthermore, many haplotypes are shared among different species. Within the Luzula sect. Luzula, both recent hybridisation and incomplete lineage sorting of ancestral polymorphisms may represent potential sources of the incongruence between chloroplast and nuclear data.
Institute of Botany, Academy of Sciences, Zámek 1, 252 43 Průhonice, Czech Republic; Center for Applied Genomics and Institute of Molecular Genetics, Academy of Sciences, Vídenská 1084, 142 20 Prague 4, Czech Republic.
This article was published in the following journal.
Name: Molecular phylogenetics and evolution
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20696260
- DOI: http://dx.doi.org/10.1016/j.ympev.2010.07.022
The clarification of the systematics of pikas (genus Ochotona) has been hindered by largely overlapping morphological characters among species and the lack of a comprehensive molecular phylogeny. Here...
The small and large nuclear subunit molecular phylogeny of the genus Prorocentrum demonstrated that the species are dichotomized into two clades. These two clades were significantly different (one-fac...
Species of the genus Steganacarus are soil-living oribatid mites (Acari, Phthiracaridae) with a ptychoid body. The phylogeny and species status of the species of Steganacarus are not resolved, some au...
Correction: Molecular Phylogeny of the Genus Lolliguncula Steenstrup, 1881 Based on Nuclear and Mitochondrial DNA Sequences Indicates Genetic Isolation of Populations from North and South Atlantic, and the Possible Presence of Further Cryptic Species.
[This corrects the article DOI: 10.1371/journal.pone.0088693.].
We report a new tree frog of the genus Gracixalus from western Thailand and describe it as a new species Gracixalus seesom based on results of morphological and molecular analyses. The new species is ...
The goal of this research study is to compare the effects of treatment based on molecular profiling to those of the standard-of-care. Treatment Assignment: From a tumor biopsy, a m...
The purpose of this study is to determine the response rate, that is the % of patients with non-progression of their metastatic breast cancer after 4 months on treatment that was selected ...
Up to half of patients with ocular melanoma (also called iris, choroidal or uveal melanoma) develop metastasis. We have found that certain molecular features of the eye tumor can be detect...
Dietary strategies for alleviating the metabolic complications such as diabetes associated with obesity are actively being pursued as alternatives to pharmaceutical interventions The genus...
Worldwide, approximately 2 billion people live in areas at risk for malaria with morbidity surpassing 250 million cases, with approximately 800,000 deaths, per year. Of the four species of...
Medical and Biotech [MESH] Definitions
The molecular designing of drugs for specific purposes (such as DNA-binding, enzyme inhibition, anti-cancer efficacy, etc.) based on knowledge of molecular properties such as activity of functional groups, molecular geometry, and electronic structure, and also on information cataloged on analogous molecules. Drug design is generally computer-assisted molecular modeling and does not include pharmacokinetics, dosage analysis, or drug administration analysis.
The relationships of groups of organisms as reflected by their genetic makeup.
Cell surface proteins that bind acetylcholine with high affinity and trigger intracellular changes influencing the behavior of cells. Cholinergic receptors are divided into two major classes, muscarinic and nicotinic, based originally on their affinity for nicotine and muscarine. Each group is further subdivided based on pharmacology, location, mode of action, and/or molecular biology.
The application of molecular biology to the answering of epidemiological questions. The examination of patterns of changes in DNA to implicate particular carcinogens and the use of molecular markers to predict which individuals are at highest risk for a disease are common examples.
A chemistry-based technology in which sets of reactions, for solution or solid-phase synthesis, are used to create molecular libraries for analysis of compounds on a large scale.