Consulta: subjectFacets:"DNA phylogeny"
Registros recuperados: 5
Data/hora: 10/06/2024 09:15:40

Biodiversity and phylogeny of Ammotheidae (Arthropoda: Pycnogonida)
Provedor de dados: 5
Autores: Sabroux, Romain; Corbari, Laure; Krapp, Franz; Bonillo, Celine; Le Prieur, Stepahnie; Hassanin, Alexandre.
The family Ammotheidae is the most diversified group of the class Pycnogonida, with 297 species described in 20 genera. Its monophyly and intergeneric relationships have been highly debated in previous studies. Here, we investigated the phylogeny of Ammotheidae using specimens from poorly studied areas. We sequenced the mitochondrial gene encoding the first subunit of cytochrome c oxidase (CO1) from 104 specimens. The complete nuclear 18S rRNA gene was sequenced from a selection of 80 taxa to provide further phylogenetic signal. The base composition in CO1 shows a higher heterogeneity in Ammotheidae than in other families, which may explain their apparent polyphyly in the CO1 tree. Although deeper nodes of the tree receive no statistical support,...
Tipo: Text
Palavras-chave: Pantopoda; Taxonomy; DNA phylogeny; Barcode of life; Strand-bias.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00484/59530/62518.pdf

Colletotrichum species causing anthracnose disease of chili in China
Provedor de dados: 16
Autores: Diao, Y.-Z.; Zhang, C.; Liu, F.; Wang, W.-Z.; Liu, L.; Cai, L.; Liu, X.-L.
Anthracnose caused by Colletotrichum species is a serious disease of more than 30 plant genera. Several Colletotrichum species have been reported to infect chili in different countries. Although China is the largest chiliproducing country, little is known about the species that have been infecting chili locally. Therefore, we collected samples of diseased chili from 29 provinces of China, from which 1285 strains were isolated. The morphological characters of all strains were observed and compared, and multi-locus phylogenetic analyses (ITS, ACT, CAL, CHS-1, GAPDH, TUB2, and HIS3) were performed on selected representative strains. Fifteen Colletotrichum species were identified, with C. fioriniae, C. fructicola, C. gloeosporioides, C. scovillei, and C....
Tipo: Article / Letter to the editor
Palavras-chave: DNA phylogeny; Multi-gene analysis; Plant pathogen; Systematics.
Ano: 2017
URL: http://www.repository.naturalis.nl/record/614095

Multiple Didymella teleomorphs are linked to the Phoma clematidina morphotype
Provedor de dados: 16
Autores: Woudenberg, J.H.C.; Aveskamp, M.M.; de Gruyter, J.; Spiers, A.G.; P.W.Crous.
The fungal pathogen Phoma clematidina is used as a biological agent to control the invasive plant species Clematis vitalba in New Zealand. Research conducted on P. clematidina as a potential biocontrol agent against,C. vitalba, led to the discovery of two perithecial-forming strains. To assess the diversity of P. clematidina and to clarify the teleomorph-anamorph relationship, phylogenetic analyses of 18 P. clematidina strains, reference strains representing the Phoma sections in the Didymellaceae and strains of related species associated with Clematis were conducted. Partial sequences of the ITS1, ITS2 and 5.8S rRNA gene, the ß-tubulin gene and 28S rRNA gene were used to clarify intra- and inter-species relationships. These analyses revealed that P....
Tipo: Article / Letter to the editor
Palavras-chave: Ascochyta vitalbae; SS-tubulin; Clematis; Didymella clematidis; Didymella vitalbina; DNA phylogeny; ITS; LSU; Taxonomy.
Ano: 2009
URL: http://www.repository.naturalis.nl/record/532396

Calonectria spp. causing leaf spot, crown and root rot of ornamental plants in Tunisia
Provedor de dados: 16
Autores: Lombard, L.; Polizzi, G.; Guarnaccia, V.; Vitale, A.; Crous, P.W.
Calonectria spp. are important pathogens of ornamental plants in nurseries, especially in the Northern Hemisphere. They are commonly associated with a wide range of disease symptoms of roots, leaves and shoots. During a recent survey in Tunisia, a number of Calonectria spp. were isolated from tissues of ornamental plants showing symptoms of leaf spot, crown and root rot. The aim of this study was to identify these Calonectria spp. using morphological and DNA sequence comparisons. Two previously undescribed Calonectria spp., C. pseudomexicana sp. nov. and C. tunisiana sp. nov., were recognised. Calonectria mexicana and C. polizzii are newly reported for the African continent. Pathogenicity tests with all four Calonectria spp. showed that they are able to...
Tipo: Article / Letter to the editor
Palavras-chave: Calonectria; Crown and root rot; DNA phylogeny; Leaf spot; Pathogenicity; Systematics.
Ano: 2012
URL: http://www.repository.naturalis.nl/record/531828

Finding the missing link: resolving the Coryneliomycetidae within Eurotiomycetes
Provedor de dados: 16
Autores: Wood, A.R.; Damm, U.; Linde, E.J. van der; Groenewald, J.Z.; Cheewangkoon, R.; Crou, P.W.
Species belonging to the Coryneliaceae and parasitizing Podocarpaceae hosts were collected from different locations in South Africa and studied morphologically by light microscopy and molecularly by obtaining partial nrDNA (ITS-1/5.8S/ITS-2, 18S and 28S) gene sequences. The position of the Coryneliaceae within the Eurotiomycetidae was not confirmed and a new subclass, Coryneliomycetidae, was introduced. While Eurotiomycetidae usually form cleistothecia/gymnothecia with evanescent, unitunicate asci, and Chaetothyriomycetidae mostly perithecia with bitunicate/fissitunicate to evanescent asci, Coryneliomycetidae form pseudothecial mazaedial ascomata, initially with double-walled asci with the outer layer deliquescing, resulting in passive ascospore release....
Tipo: Article / Letter to the editor
Palavras-chave: Corynelia; DNA phylogeny; Lagenulopsis; Phytopathogenic fungi; Sordariomycetes; Systematics; Tripospora.
Ano: 2016
URL: http://www.repository.naturalis.nl/record/611852