Advertisement
Advertise here Publish your press releases here Sponsor BioPortfolio
Follow us on Twitter Sign up for daily news and research emails Contributors wanted

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.

11:20 EDT 23rd April 2014 | BioPortfolio

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.

Affiliation

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.

Journal Details

This article was published in the following journal.

Name: Molecular phylogenetics and evolution
ISSN: 1095-9513
Pages:

Links

PubMed Articles [15695 Associated PubMed Articles listed on BioPortfolio]

Molecular phylogeny of the butterfly genus polytremis (hesperiidae, hesperiinae, baorini) in china.

The genus Polytremis, restricted to the continental part of the southeastern Palaearctic and northern Oriental regions, is one of the largest and most diverse lineages of the tribe Baorini. Previous s...

Climate and soil type together explain the distribution of microendemic species in a biodiversity hotspot.

The grasshopper genus Caledonula, endemic to New Caledonia, was studied to understand the evolution of species distributions in relation to climate and soil types. Based on a comprehensive sampling of...

Revision of three camaenid and one bradybaenid species (Gastropoda, Stylommatophora) from China based on morphological and molecular data, with description of a new bradybaenid subspecies from Inner Mongolia, China.

We have revised the taxonomy of three camaenid and one bradybaenid species from China and described one new subspecies of the genus Bradybaena (Family Bradybaenidae) from Inner Mongolia, China. The ge...

Phylogeny, character evolution, and biogeography of Cuscuta (dodders; Convolvulaceae) inferred from coding plastid and nuclear sequences.

The parasitic genus Cuscuta, containing some 200 species circumscribed traditionally in three subgenera, is nearly cosmopolitan, occurring in a wide range of habitats and hosts. Previous molecular stu...

The plastid genomes of flowering plants.

The plastid genome (plastome) has proved a valuable source of data for evaluating evolutionary relationships among angiosperms. Through basic and applied approaches, plastid transformation technology...

Clinical Trials [1500 Associated Clinical Trials listed on BioPortfolio]

Pilot Study Using Molecular Profiling to Find Potential Targets and Select Treatments for Patients With Metastatic Breast Cancer.

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...

Validation of a Molecular Prognostic Test for Eye Melanoma

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...

The 'MADe IT' Clinical Trial: Molecular Analyses Directed Individualized Therapy for Advanced Non-Small Cell Lung Cancer

The standard treatment for non-small cell lung cancer, stage IV or IIIB malignant pleural effusion is chemotherapy. The decision to use a regimen is currently determined by toxicity or by...

Treatment Based on Molecular Profiling Diagnosis Carcinoma of Unknown Primary Site

This is a non-randomized Phase II study. Patients determined at initial diagnosis to have a carcinoma of unknown primary site will have their treatment selected with the use of a molecula...

IMAGE: A Comparison of AlloMap Molecular Testing and Traditional Biopsy-based Surveillance for Heart Transplant Rejection

This study is designed to evaluate the safety and efficacy of a leukocyte gene expression profiling method in the monitoring of asymptomatic heart transplant patients for acute rejection.

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.

Search BioPortfolio: