keyword
MENU ▼
Read by QxMD icon Read
search

Speciation

keyword
https://www.readbyqxmd.com/read/28098850/a-rare-exception-to-haldane-s-rule-are-x-chromosomes-key-to-hybrid-incompatibilities
#1
P A Moran, M G Ritchie, N W Bailey
The prevalence of Haldane's rule suggests that sex chromosomes commonly have a key role in reproductive barriers and speciation. However, the majority of research on Haldane's rule has been conducted in species with conventional sex determination systems (XY and ZW) and exceptions to the rule have been understudied. Here we test the role of X-linked incompatibilities in a rare exception to Haldane's rule for female sterility in field cricket sister species (Teleogryllus oceanicus and T. commodus). Both have an XO sex determination system...
January 18, 2017: Heredity
https://www.readbyqxmd.com/read/28097160/contribution-to-the-molecular-systematics-of-the-genus-capoeta-from-the-south-caspian-sea-basin-using-mitochondrial-cytochrome-b-sequences-teleostei-cyprinidae
#2
Halimeh Zareian, Hamid Reza Esmaeili, Adeleh Heidari, Majid Reza Khoshkholgh, Hamed Mousavi-Sabet
Traditionally, Capoeta populations from the southern Caspian Sea basin have been considered as Capoeta capoeta gracilis. Study on the phylogenetic relationship of Capoeta species using mitochondrial cytochrome b gene sequences show that Capoeta population from the southern Caspian Sea basin is distinct species and receive well support (posterior probability of 100%). Based on the tree topologies obtained from Bayesian and Maximum Likelihood methods, three main groups for the studied Capoeta were detected: Clade I) Capoeta trutta group (the Mesopotamian Capoeta group) including closely related taxa (e...
June 2016: Molecular Biology Research Communications
https://www.readbyqxmd.com/read/28095919/ancient-bacteria-of-the-%C3%A3-tzi-s-microbiome-a-genomic-tale-from-the-copper-age
#3
Gabriele Andrea Lugli, Christian Milani, Leonardo Mancabelli, Francesca Turroni, Chiara Ferrario, Sabrina Duranti, Douwe van Sinderen, Marco Ventura
BACKGROUND: Ancient microbiota information represents an important resource to evaluate bacterial evolution and to explore the biological spread of infectious diseases in history. The soft tissue of frozen mummified humans, such as the Tyrolean Iceman, has been shown to contain bacterial DNA that is suitable for population profiling of the prehistoric bacteria that colonized such ancient human hosts. RESULTS: Here, we performed a microbial cataloging of the distal gut microbiota of the Tyrolean Iceman, which highlights a predominant abundance of Clostridium and Pseudomonas species...
January 17, 2017: Microbiome
https://www.readbyqxmd.com/read/28095328/an-integrated-proteomic-and-transcriptomic-analysis-of-perivitelline-fluid-proteins-in-a-freshwater-gastropod-laying-aerial-eggs
#4
Huawei Mu, Jin Sun, Horacio Heras, Ka Hou Chu, Jian-Wen Qiu
: Proteins of the egg perivitelline fluid (PVF) that surrounds the embryo are critical for embryonic development in many animals, but little is known about their identities. Using an integrated proteomic and transcriptomic approach, we identified 64 proteins from the PVF of Pomacea maculata - a freshwater snail adopting aerial oviposition. Proteins were classified into eight functional groups: major multifunctional perivitellin subunits, immune response, energy metabolism, protein degradation, oxidation-reduction, signaling and binding, transcription and translation, and others...
January 14, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28094921/uranium-redox-transformations-after-u-vi-coprecipitation-with-magnetite-nanoparticles
#5
Ivan Pidchenko, Kristina O Kvashnina, Tadahiro Yokosawa, Nicolas Finck, Sebastian Bahl, Dieter Schild, Robert Polly, Elke Bohnert, Andre Rossberg, Jörg Göttlicher, Kathy Dardenne, Jörg Rothe, Thorsten Schäfer, Horst Geckeis, Tonya Vitova
Uranium redox states and speciation in magnetite nanoparticles co-precipitated with U(VI) for uranium loadings varying from 1000 to 10000 ppm are investigated by X-ray absorption spectroscopy (XAS). It is demonstrated that the U M4 high energy resolution X-ray absorption near edge structure (HR-XANES) method is capable to clearly characterize U(IV), U(V) and U(VI) existing simultaneously in the same sample. The contributions of the three different uranium redox states are quantified with the iterative transformation factor analysis (ITFA) method...
January 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28094474/introduction-integrative-molecular-ecology-is-rapidly-advancing-the-study-of-adaptation-and-speciation
#6
Sean M Rogers, Shuqing Xu, Philipp M Schlüter
No abstract text is available yet for this article.
January 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28094438/environmental-niche-conservatism-explains-the-accumulation-of-species-richness-in-mediterranean-hotspot-plant-genera
#7
Alexander Skeels, Marcel Cardillo
The causes of exceptionally high plant diversity in Mediterranean-climate biodiversity hotspots are not fully understood. We asked whether a mechanism similar to the tropical niche conservatism hypothesis could explain the diversity of four large genera (Protea, Moraea, Banksia, and Hakea) with distributions within and adjacent to the Greater Cape Floristic Region (South Africa) or the Southwest Floristic Region (Australia). Using phylogenetic and spatial data we estimated the environmental niche of each species, and reconstructed the mode and dynamics of niche evolution, and the geographic history, of each genus...
January 17, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28094280/accumulation-and-transformation-of-inorganic-and-organic-arsenic-in-rice-and-role-of-thiol-complexation-to-restrict-their-translocation-to-shoot
#8
Seema Mishra, Jürgen Mattusch, Rainer Wennrich
Environmental contamination of arsenic (As) and its accumulation in rice (Oryza sativa L.) is of serious human health concern. In planta speciation of As is an important tool to understand As metabolism in plants. In the present study, we investigated root to shoot As translocation and speciation in rice exposed to inorganic and methylated As. Arsenate (As(V)) and methylarsonate (MA(V)) were efficiently reduced to arsenite (As(III)) and MA(III), respectively in rice root and shoot but no trivalent form of dimethylarsinate (DMA(V)) was detected...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28092769/spatiotemporal-change-of-phosphorous-speciation-and-concentration-in-stormwater-in-the-st-lucie-estuary-watershed-south-florida
#9
Liguang Li, Zhenli He, Zhigang Li, Suli Li, Yongshan Wan, Peter J Stoffella
Phosphorous (P) concentration in stormwater runoff varies at different spatial and temporal scales. Excessive P loading from agriculture system into the St. Lucie Estuary (SLE) contributed to water quality deterioration in southern Indian River Lagoon. This study examines the spatial and temporal shifts of different P forms in runoff and storm water under different land use, water management, and rainfall conditions. Storm water samplings were conducted monthly between April 2013 and December 2014 in typical farmland and along the waterway (Canal C-24) that connects lands to the SLE...
January 6, 2017: Chemosphere
https://www.readbyqxmd.com/read/28091885/assessing-the-impact-of-preload-on-pyrite-rich-sediment-and-groundwater-quality
#10
Ohene Karikari-Yeboah, Jonas Addai-Mensah
Pyrite-rich sediments would, invariably, undergo redox reactions which would lead to acidic aqueous environment containing solubilized toxic metal species. When such sediments are subjected to preload, a technique employed by geotechnical engineers to improve the load-bearing capacity of highly compressible formation, transient flow of pore water, accompanied by acidity transfer, would occur as a response. Despite the concomitant environmental and socio-economic significance, to date, there has been limited interdisciplinary research on the underpinning geotechnical engineering and geo-environmental science issues for pyrite-rich sediments under preload...
February 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28091653/trivalent-f-elements-in-human-saliva-a-comprehensive-speciation-study-by-time-resolved-laser-induced-fluorescence-spectroscopy-and-thermodynamic-calculations
#11
Astrid Barkleit, Claudia Wilke, Anne Heller, Thorsten Stumpf, Atsushi Ikeda-Ohno
In the case of oral ingestion of radioactive contaminants, the first contact medium is saliva in the mouth. To gain a first insight into the interaction of radioactive contaminants in human saliva, the speciation of curium (Cm(iii)) and europium (Eu(iii)), i.e., trivalent f-elements, was investigated in different salivary media with time-resolved laser-induced fluorescence spectroscopy (TRLFS). The results indicate that these metal cations are primarily complexed with carbonates and phosphates, forming ternary complexes with a possible stoichiometry of 1 : 1 : 2 (M(iii) : carbonate : phosphate)...
January 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28091580/population-expansions-dominate-demographic-histories-of-endemic-and-widespread-pacific-reef-fishes
#12
Erwan Delrieu-Trottin, Stefano Mona, Jeffrey Maynard, Valentina Neglia, Michel Veuille, Serge Planes
Despite the unique nature of endemic species, their origin and population history remain poorly studied. We investigated the population history of 28 coral reef fish species, close related, from the Gambier and Marquesas Islands, from five families, with range size varying from widespread to small-range endemic. We analyzed both mitochondrial and nuclear sequence data using neutrality test and Bayesian analysis (EBSP and ABC). We found evidence for demographic expansions for most species (24 of 28), irrespective of range size, reproduction strategy or archipelago...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28091568/identification-of-misexpressed-genetic-elements-in-hybrids-between-drosophila-related-species
#13
Hélène Lopez-Maestre, Elias A G Carnelossi, Vincent Lacroix, Nelly Burlet, Bruno Mugat, Séverine Chambeyron, Claudia M A Carareto, Cristina Vieira
Crosses between close species can lead to genomic disorders, often considered to be the cause of hybrid incompatibility, one of the initial steps in the speciation process. How these incompatibilities are established and what are their causes remain unclear. To understand the initiation of hybrid incompatibility, we performed reciprocal crosses between two species of Drosophila (D. mojavensis and D. arizonae) that diverged less than 1 Mya. We performed a genome-wide transcriptomic analysis on ovaries from parental lines and on hybrids from reciprocal crosses...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28089841/the-birth-of-aposematism-high-phenotypic-divergence-and-low-genetic-diversity-in-a-young-clade-of-poison-frogs
#14
Rebecca Dent Tarvin, Emily A Powell, Juan C Santos, Santiago R Ron, David C Cannatella
Rapid radiation coupled with low genetic divergence often hinders species delimitation and phylogeny estimation even if putative species are phenotypically distinct. Some aposematic species, such as poison frogs (Dendrobatidae), have high levels of intraspecific color polymorphism, which can lead to overestimation of species when phenotypic divergence primarily guides species delimitation. We explored this possibility in the youngest origin of aposematism (3-7 MYA) in poison frogs, Epipedobates, by comparing genetic divergence with color and acoustic divergence...
January 13, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28089840/biogeography-and-diversification-dynamics-of-the-african-woodpeckers
#15
Jérôme Fuchs, Jean-Marc Pons, Rauri C K Bowie
The dynamics of species accumulation of African terrestrial vertebrates over time remains underexplored in comparison with those in the New World, despite Africa hosting about 25% of the world's avian diversity. This lack of knowledge hampers our understanding of the fundamental processes that drive biodiversity and the dynamics of speciation. To begin to address this gap, we reconstructed species-level phylogenies of two unrelated clades of African woodpeckers (12 species of Geocolaptes/Campethera and 13 species of Chloropicus/ Mesopicos/ Dendropicos/Ipophilus) that diverged from their closest Indo-Malayan relatives at similar times...
January 12, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28089210/pm10-and-pm2-5-chemical-source-profiles-with-optical-attenuation-and-health-risk-indicators-of-paved-and-unpaved-road-dust-in-bhopal-india
#16
Shilpi Samiksha, Ramya Sunder Raman, Jayant Nirmalkar, Samresh Kumar, Rohit Sirvaiya
Size classified (PM10 and PM2.5) paved and unpaved road dust chemical source profiles, optical attenuation and potential health risk from exposure to these sources are reported in this study. A total of 45 samples from 9 paved road and 6 unpaved road sites located in and around Bhopal were re-suspended in the laboratory, collected onto filter substrates and subjected to a variety of chemical analyses. In general, road dust was enriched (compared to upper continental crustal abundance) in anthropogenic pollutants including Sb, Cu, Zn, Co, and Pb...
January 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28087777/genome-sequencing-reveals-the-origin-of-the-allotetraploid-arabidopsis-suecica
#17
Polina Yu Novikova, Takashi Tsuchimatsu, Samson Simon, Viktoria Nizhynska, Viktor Voronin, Robin Burns, Olga M Fedorenko, Svante Holm, Torbjörn Säll, Elisa Prat, William Marande, Vincent Castric, Magnus Nordborg
Polyploidy is an example of instantaneous speciation when it involves the formation of a new cytotype that is incompatible with the parental species. Because new polyploid individuals are likely to be rare, establishment of a new species is unlikely unless polyploids are able to reproduce through self-fertilization (selfing), or asexually. Conversely, selfing (or asexuality) makes it possible for polyploid species to originate from a single individual - a bona fide speciation event. The extent to which this happens is not known...
January 12, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28087776/seed-plant-specific-gene-lineages-involved-in-carpel-development
#18
Kai C Pfannebecker, Matthias Lange, Oliver Rupp, Annette Becker
Evolutionary innovations are important drivers of speciation and some are the defining characters of entire phyla. One such major innovation is the carpel, the unifying character and most complex plant organ, composed of many clearly distinct tissue types to ensure reproductive success. The origin of the carpel is unknown, but many components of the gene regulatory network (GRN) governing carpel development and their genetic interactions are known from the core eudicot Arabidopsis thaliana To unravel the evolution of the carpel GRN and to discriminate between "early" and "late" steps in carpel evolution we calculated thorough phylogeny reconstructions based on sequenced genomes...
January 12, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28086786/widespread-introgression-in-deep-sea-hydrothermal-vent-mussels
#19
Corinna Breusing, Robert C Vrijenhoek, Thorsten B H Reusch
BACKGROUND: The analysis of hybrid zones is crucial for gaining a mechanistic understanding of the process of speciation and the maintenance of species boundaries. Hybrid zones have been studied intensively in terrestrial and shallow-water ecosystems, but very little is known about their occurrence in deep-sea environments. Here we used diagnostic, single nucleotide polymorphisms in combination with one mitochondrial gene to re-examine prior hypotheses about a contact zone involving deep-sea hydrothermal vent mussels, Bathymodiolus azoricus and B...
January 13, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28081503/in-silico-identification-of-alternative-oxidase-2-aox2-in-monocots-a-new-evolutionary-scenario
#20
José Hélio Costa, Clesivan Pereira Dos Santos, Beatriz de Sousa E Lima, Anthônio Nunes Moreira Netto, Kátia Daniella da Cruz Saraiva, Birgit Arnholdt-Schmitt
We identified AOX2 genes in monocot species from Lemnoideae (Spirodela polyrhiza, Lemna gibba and Landoltia punctata), Pothoideae (Anthurium andraeanum and Anthurium amnicola) and Monsteroideae (Epipremnum aureum) subfamilies within the Araceae, an early-diverging monocot family. These findings highlight the presence of AOX2 in the most ancient monocot ancestor and also that at least partial loss of this gene occurred during speciation events within several monocot orders. The presence of AOX2 in monocot species challenges (1) new understanding of the evolutionary history of the AOX gene family in angiosperms and (2) drives experimental and bioinformatics efforts to explore functional relevance of the two AOX gene family members for plant growth and development...
December 27, 2016: Journal of Plant Physiology
keyword
keyword
66076
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"