scholarly journals AFM VISUALIZATION OF PHYTOPLASMA DNA IMMOBILIZATION AND HYBRIDIZATION EVENT ON CHITOSAN MODIFIED SPCE SURFACE

2020 ◽  
Vol 18 (67) ◽  
Author(s):  
Porntip Wongkaew
Keyword(s):  
Dna Immobilization ◽  
Hybridization Event

Diversification of the North American Doellingeria-Eucephalus Clade (Astereae: Asteraceae) Inferred from Molecular and Morphological Evidence

2019 ◽  
Vol 44 (4) ◽  
pp. 930-942
Author(s):  
Geraldine A. Allen ◽  
Luc Brouillet ◽  
John C. Semple ◽  
Heidi J. Guest ◽  
Robert Underhill
Keyword(s):  
North American ◽  
Sequence Data ◽  
Phylogenetic Analyses ◽  
Sister Group ◽  
Morphological Evidence ◽  
South American ◽  
New Combinations ◽  
The North ◽  
Hybridization Event ◽  
Ancient Hybridization

Abstract—Doellingeria and Eucephalus form the earliest-diverging clade of the North American Astereae lineage. Phylogenetic analyses of both nuclear and plastid sequence data show that the Doellingeria-Eucephalus clade consists of two main subclades that differ from current circumscriptions of the two genera. Doellingeria is the sister group to E. elegans, and the Doellingeria + E. elegans subclade in turn is sister to the subclade containing all remaining species of Eucephalus. In the plastid phylogeny, the two subclades are deeply divergent, a pattern that is consistent with an ancient hybridization event involving ancestral species of the Doellingeria-Eucephalus clade and an ancestral taxon of a related North American or South American group. Divergence of the two Doellingeria-Eucephalus subclades may have occurred in association with northward migration from South American ancestors. We combine these two genera under the older of the two names, Doellingeria, and propose 12 new combinations (10 species and two varieties) for all species of Eucephalus.

Enhancement of DNA Immobilization and Hybridization on Gold Electrode Modified Using ZnO Nanoparticles/Chitosan Film

2011 ◽  
Vol 7 (4) ◽  
pp. 296-305 ◽  
Author(s):  
Shafiquzzaman Siddiquee ◽  
Nor A. Yusof ◽  
Abu Bakar Salleh ◽  
Soon G.Tan ◽  
Fatimah Abu Bakar
Keyword(s):  
Zno Nanoparticles ◽  
Gold Electrode ◽  
Chitosan Film ◽  
Dna Immobilization

scholarly journals A wood-warbler produced through both interspecific and intergeneric hybridization

2018 ◽  
Vol 14 (11) ◽  
pp. 20180557 ◽  
Author(s):  
David P. L. Toews ◽  
Henry M. Streby ◽  
Lowell Burket ◽  
Scott A. Taylor
Keyword(s):  
Intergeneric Hybridization ◽  
Population Declines ◽  
Morphometric Traits ◽  
Early Generation ◽  
Phenotypic Differences ◽  
Vermivora Chrysoptera ◽  
Hybridization Event ◽  
Wood Warblers ◽  
Declining Populations ◽  
Female Hybrid

Hybridization between divergent taxa can provide insight into the breakdown of characters used in mate choice, as well as reproductive compatibility across deep evolutionary timescales. Hybridization can also occur more frequently in declining populations, as there is a smaller pool of conspecific mates from which to choose. Here, we report an unusual combination of factors that has resulted in a rare, three-species hybridization event among two genera of warblers, one of which is experiencing significant population declines. We use bioacoustic, morphometric and genetic data, to demonstrate that an early generation female hybrid between a golden-winged warbler ( Vermivora chrysoptera ) and a blue-winged warbler ( V. cyanoptera ) went on to mate and successfully reproduce with a chestnut-sided warbler ( Setophaga pensylvanica ) . We studied the product of this event—a putative chrysoptera × cyanoptera × pensylvanica hybrid—and show that this male offspring sang songs like S. pensylvanica , but had morphometric traits similar to Vermivora warblers. The hybrid's maternal parent had V. chrysoptera mitochondrial DNA and , with six plumage-associated loci, we predicted the maternal parent's phenotype to show that it was likely an early generation Vermivora hybrid . That this hybridization event occurred within a population of Vermivora warblers in significant decline suggests that females may be making the best of a bad situation, and that wood-warblers in general have remained genetically compatible long after they evolved major phenotypic differences.

scholarly journals Identification of a novel Candida metapsilosis isolate suggests ongoing hybridization.

2021 ◽  
Author(s):  
Caoimhe E. O'Brien ◽  
Bing Zhai ◽  
Mihaela Ola ◽  
Eoin Ó Cinnéide ◽  
Ísla O'Connor ◽  
...  
Keyword(s):  
Loss Of Heterozygosity ◽  
Mating Type ◽  
Small Proportion ◽  
Species Complex ◽  
The Other ◽  
Human Pathogens ◽  
Hybridization Event ◽  
Candida Metapsilosis ◽  
Genome Stabilization ◽  
Haplotype A

Candida metapsilosis is a member of the C. parapsilosis species complex, a group of opportunistic human pathogens. Of all the members of this complex, C. metapsilosis is the least virulent, and accounts for a small proportion of invasive Candida infections. Previous studies established that all C. metapsilosis isolates are hybrids, originating from a single hybridization event between two lineages, parent A and parent B. Here, we use MinION and Illumina sequencing to characterize a C. metapsilosis isolate that originated from a separate hybridization. One of the parents of the new isolate is very closely related to parent A. However, the other parent (parent C) is not the same as parent B. Unlike C. metapsilosis AB isolates, the C. metapsilosis AC isolate has not undergone introgression at the Mating Type-like Locus. In addition, the A and C haplotypes are not fully collinear. The C. metapsilosis AC isolate has undergone Loss of Heterozygosity (LOH) with a preference for haplotype A, indicating that this isolate is in the early stages of genome stabilization.

scholarly journals A new natural hybrid of Broughtonia (Orchidaceae) from Cuba

Lankesteriana ◽  
2015 ◽  
Vol 15 (3) ◽  
Author(s):  
Ernesto Mújica ◽  
Elaine González ◽  
José L. Bocourt ◽  
Esther L. SantaCruz ◽  
J. M. Díaz
Keyword(s):  
Related Species ◽  
San Antonio ◽  
Time Frame ◽  
Natural Hybridization ◽  
Floral Traits ◽  
Natural Hybrid ◽  
Single Specimen ◽  
Hybridization Event

At Cabo San Antonio (Guanahacabibes Peninsula), Cuba in 2004, a single specimen of Broughtonia ortgiesiana (Rchb.f.) Dressler, and a related species, Broughtonia cubensis (Lindl.) Cogn., were both observed in flower simultaneously. In 2006, fruits were observed on B. ortgiesiana, and nine years later (2015) we noted five young plants in anthesis that displayed floral characteristics common to both species. Given the time frame and the blend of floral traits, we conclude that these five plants are the result of a natural hybridization event between the two Broughtonia species the details of which are described here.

Impedimetric evaluation of hybrid cationic porphyrin/quantum dot multilayer assemblies: a biocompatible interface for calf thymus DNA immobilization

2016 ◽  
Vol 21 (1) ◽  
pp. 243-253 ◽  
Author(s):  
Camilo García ◽  
Freddy Navarro ◽  
Domingo Ruíz-León ◽  
Olimpo García Beltrán ◽  
María Jesús Aguirre
Keyword(s):  
Quantum Dot ◽  
Calf Thymus Dna ◽  
Dna Immobilization ◽  
Cationic Porphyrin ◽  
Calf Thymus ◽  
Multilayer Assemblies

An innovative nucleic acid based biosensor toward detection of Legionella pneumophila using DNA immobilization and hybridization: A novel genosensor

2019 ◽  
Vol 148 ◽  
pp. 708-716 ◽  
Author(s):  
Ahmad Mobed ◽  
Mohammad Hasanzadeh ◽  
Soodabeh Hassanpour ◽  
Arezoo Saadati ◽  
Mohammad Agazadeh ◽  
...  
Keyword(s):  
Nucleic Acid ◽  
Legionella Pneumophila ◽  
Dna Immobilization

The genetic make-up of the European landraces of the common bean

2011 ◽  
Vol 9 (2) ◽  
pp. 197-201 ◽  
Author(s):  
S. A. Angioi ◽  
D. Rau ◽  
L. Nanni ◽  
E. Bellucci ◽  
R. Papa ◽  
...  
Keyword(s):  
Common Bean ◽  
Gene Pool ◽  
Chloroplast Microsatellites ◽  
Gene Pools ◽  
Mesoamerican Gene Pool ◽  
Hybridization Event ◽  
South Eastern Europe ◽  
Andean Type ◽  
The Common ◽  
African Sample

Here, we present a brief overview of the main studies conducted on the common bean (Phaseolus vulgaris L.) in Europe and other countries outside its centres of origin. We focus on the proportions of the Andean and Mesoamerican gene pools, and on the inter-gene pool hybridization events. In Europe, for chloroplast microsatellites, 67% of European germplasm is of Andean origin. Within Europe, interesting trends have been seen; indeed, the majority of the Andean type is found in the three macro-areas of the Iberian Peninsula, Italy and central-northern Europe, while, in eastern and south-eastern Europe, the proportion of the Mesoamerican type increased. On a local scale, the contribution of the Mesoamerican type is always low. On other continents, various situations are seen using different markers: in China and Brazil, the Mesoamerican gene pool prevails, while in an African sample, overall, both gene pools are equally represented, with differences in individual countries. The frequency of European bean genotypes deriving from at least one hybridization event was 44% with an uneven distribution. Interestingly, hybrids tend to have intermediate seed size in comparison with ‘pure’ Andean or Mesoamerican types. On other continents, very few hybrids are found, probably because of the different marker systems used.

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