A5085879913- Genetics, Bioinformatics, and Biomedical Research
- Genomics and Phylogenetic Studies
- Wheat and Barley Genetics and Pathology
- Genetic diversity and population structure
- Isotope Analysis in Ecology
- Plant nutrient uptake and metabolism
- Plant Disease Resistance and Genetics
- Gut microbiota and health
- Ruminant Nutrition and Digestive Physiology
- Evolution and Paleontology Studies
- Insect and Arachnid Ecology and Behavior
- Turtle Biology and Conservation
- Plant Virus Research Studies
- Gout, Hyperuricemia, Uric Acid
- Evolution and Genetic Dynamics
- Genetic and phenotypic traits in livestock
- Pleistocene-Era Hominins and Archaeology
- Mercury impact and mitigation studies
- Identification and Quantification in Food
- Animal health and immunology
- Shallot Cultivation and Analysis
- Diet, Metabolism, and Disease
- Agriculture Sustainability and Environmental Impact
- Morphological variations and asymmetry
- Garlic and Onion Studies
Akwa Ibom State University
2025
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2018-2021
Unité Mixte de Recherche sur les Herbivores
2018-2021
VetAgro Sup
2018-2019
Université Clermont Auvergne
2011-2019
Génétique, Diversité, Écophysiologie des Céréales
2014-2018
Université de Montpellier
2013-2017
Centre National de la Recherche Scientifique
2009-2017
Institut des Sciences de l'Evolution de Montpellier
2013-2017
École Pratique des Hautes Études
2017
Efficient algorithms and programs for the analysis of ever-growing amount biological sequence data are strongly needed in genomics era. The pace at which new methodologies generated calls use pre-existing, optimized—yet extensible—code, typically distributed as libraries or packages. This motivated Bio++ project, aiming developing a set C++ analysis, phylogenetics, population genetics, molecular evolution. main attractiveness is extensibility reusability its components through...
In animals, the population genomic literature is dominated by two taxa, namely mammals and drosophilids, in which fully sequenced, well-annotated genomes have been available for years. Data from other metazoan phyla are scarce, probably because vast majority of living species still lack a closely related reference genome. Here we achieve de novo, reference-free analysis wild samples five non-model animal species, based on next-generation sequencing transcriptome data. We introduce pipe-line...
Abstract Summary: Metavir is a web server dedicated to the analysis of viral metagenomes (viromes). In addition classical approaches for analyzing (general sequence characteristics, taxonomic composition), new tools developed specifically make it possible to: (i) explore diversity through automatically constructed phylogenies selected marker genes, (ii) estimate gene richness rarefaction curves and (iii) perform cross-comparison against other viromes using similarities. thus unique as...
Warm-Blooded Reptiles? Existing reptiles are not thought to be endothermic, but what about extinct species? Three large swimming reptiles, the ichthyosaurs, plesiosaurs, and mosasaurs, were active predators in Mesozoic oceans. Bernard et al. (p. 1379 ; see Perspective by Motani ) investigated their metabolism analyzing oxygen isotopes teeth, compared with fish deposits from a variety of ocean environments. The data imply that ichthyosaurs which both pursuit predators, probably controlled own...
The evolution of reproductive division labour and social life in insects has lead to the emergence several life-history traits adaptations typical larger organisms: insect colonies can reach masses kilograms, they start reproducing only when are years old, live for decades. These features monopolization reproduction by one or few individuals a colony should affect molecular reducing effective population size. We tested this prediction analysing genome-wide patterns coding sequence...
Abstract Mitigation of greenhouse gas emissions is relevant for reducing the environmental impact ruminant production. In this study, rumen microbiome from Holstein cows was characterized through a combination 16S rRNA gene and shotgun metagenomic sequencing. Methane production (CH 4 ) dry matter intake (DMI) were individually measured over 4–6 weeks to calculate CH yield y = /DMI) per cow. We implemented clustering, multivariate mixed model analyses identify set operational taxonomic unit...
Abstract Recent evidence suggests that changes in microbial colonization of the rumen prior to weaning may imprint microbiome and impact phenotypes later life. We investigated how dietary manipulation from birth influences growth, methane production, gastrointestinal ecology. At birth, 18 female Holstein Montbéliarde calves were randomly assigned either treatment or control (CONT). Treatment was 3-nitrooxypropanol (3-NOP), an investigational anti-methanogenic compound administered daily...
Numerous scaffold-level sequences for wheat are now being released and, in this context, we report on a strategy improving the overall assembly to level comparable that of human genome. Using chromosome 7A as model, sequence-finished megabase-scale sections were established by combining new independent using bacterial artificial (BAC)-based physical map, BAC pool paired-end sequencing, chromosome-arm-specific mate-pair sequencing and Bionano optical mapping with International Wheat Genome...
Because mating systems affect population genetics and ecology, they are expected to impact the molecular evolution of species. Self-fertilizing species experience reduced effective size, recombination rates, heterozygosity, which in turn should decrease efficacy natural selection, both adaptive purifying, strength meiotic drive processes such as GC-biased gene conversion. The empirical evidence is only partly congruent with these predictions, depending on analyzed species, some, but not all,...
In support of the international effort to obtain a reference sequence bread wheat genome and provide plant communities dealing with large complex genomes versatile, easy-to-use online automated tool for annotation, we have developed TriAnnot pipeline. Its modular architecture allows annotation masking transposable elements, structural, functional protein-coding genes an evidence-based quality indexing, identification conserved non-coding sequences molecular markers. The pipeline is...
Abstract A high‐precision, and rapid on‐line method for oxygen isotope analysis of silver phosphate is presented. The technique uses high‐temperature elemental analyzer (EA)‐pyrolysis interfaced in continuous flow (CF) mode to an isotopic ratio mass spectrometer (IRMS). Calibration curves were generated by synthesizing with a 13‰ spread δ 18 O values. materials obtained reacting dissolved potassium dihydrogen (KH 2 PO 4 ) water samples various compositions at 373 K. Validity the was tested...
Dietary supplementation with linseed, saponins, and nitrate is a promising methane mitigation strategy in ruminant production. Here, we aimed to assess the effects of these additives on rumen microbiota order understand underlying microbial mechanisms abatement. Two 2-by-2 factorial design studies were conducted simultaneously, which also allowed us make broad-based assessment responses. Eight nonlactating cows fed diets supplemented linseed or saponin decrease hydrogen production affect...
The study was conducted at the Teaching and Research Farm of Akwa Ibom State University, Obio Akpa Campus, in May, 2022 to February, 2023 cropping seasons examine effect organic fertilizers namely: Decomposed Fluted Pumpkin pod (DFPP), oil palm Bunch Ash (OPBA) poultry Manure (PM) on growth yield performance Garlic. experiment laid out a Randomized complete Block Design with four treatments replicated three times. Parameters were number leaves, length plant height, Cloves, weight fresh bulb,...
The giant Galápagos tortoise, Chelonoidis nigra, is a large-sized terrestrial chelonian of high patrimonial interest. species recently colonized small continental archipelago, the Islands, where it has been facing novel environmental conditions and limited resource availability. To explore genomic consequences this ecological shift, we analyze transcriptomic variability five individuals C. compare to similar data obtained from several turtles. Having clarified timing divergence in genus,...
Abstract Closely related species are key models to investigate mechanisms leading reproductive isolation and early stages of diversification, also at the genomic level. The brittle star cryptic complex Ophioderma longicauda encompasses sympatric broadcast‐spawning C3 internal brooding C5. Here, we used de novo transcriptome sequencing assembly in two closely displaying contrasting modes compare their genetic diversity role natural selection isolation. We reconstructed 20 146 22 123 genes for...
Whether species can respond evolutionarily to current climate change is crucial for the persistence of many species. Yet, very few studies have examined genetic responses in manipulated experiments carried out natural field conditions. We evolutionary response a common annelid worm using controlled replicated experiment where climatic conditions were setting. Analyzing transcribed genome 15 local populations, we found that about 12% polymorphisms exhibit differences allele frequencies...
Abstract Dietary supplementation with linseed, saponins and nitrate is a promising methane mitigation strategy in ruminant production. The main objective of this work was to assess the effects these additives on rumen microbiota order understand underlying microbial mechanisms abatement. Two 2 × factorial design studies were conducted simultaneously, which also allowed us make broad-based assessment responses. Eight non-lactating cows fed diets supplemented linseed or saponin decrease...
Abstract Background Numerous scaffold-level sequences for wheat are now being released and, in this context, we report on a strategy improving the overall assembly to level comparable that of human genome. Results Using chromosome 7A as model, sequence-finished megabase scale sections were established by combining new independent based BAC-based physical map, BAC pool paired end sequencing, arm specific mate-pair sequencing and Bionano optical mapping with IWGSC RefSeq v1.0 sequence its...
The 2009 H1N1 outbreak has demonstrated that continuing vigilance, planning, and strong public health research capability are essential defenses against emerging threats. Molecular epidemiology of influenza virus strains provides scientists with clues about the temporal geographic evolution virus. In present paper, researchers from France Vietnam proposing a global surveillance network based on grid technology: goal is to federate data servers deploy automatically molecular studies. A first...