keyword
MENU ▼
Read by QxMD icon Read
search

Genetic diversity

keyword
https://www.readbyqxmd.com/read/29679714/population-genetics-phylogenomics-and-hybrid-speciation-of-juglans-in-china-determined-from-whole-chloroplast-genomes-transcriptomes-and-genotyping-by-sequencing-gbs
#1
Peng Zhao, Hui-Juan Zhou, Daniel Potter, Yi-Heng Hu, Xiao-Jia Feng, Meng Dang, Li Feng, Saman Zulfiqar, Wen-Zhe Liu, Guifang Zhao, Keith Woeste
Genomic data are a powerful tool for elucidating the processes involved in the evolution and divergence of species. The speciation and phylogenetic relationships among Chinese Juglans remain unclear. Here, we used results from phylogenomic and population genetic analyses, transcriptomics, Genotyping-By-Sequencing (GBS), and whole chloroplast genomes (Cp genome) data to infer processes of lineage formation among the five native Chinese species of the walnut genus (Juglans, Juglandaceae), a widespread, economically important group...
April 18, 2018: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/29679512/phylogenetic-analysis-of-dunaliella-chlorophyta-emphasizing-new-benthic-and-supralittoral-isolates-from-great-salt-lake
#2
William J Henley, Michael Cobbs, Lucie Novoveská, Mark A Buchheim
Dunaliella, a commercially important chlorophyte, is globally distributed in saline habitats. Morphological species have not been definitively reconciled with phylogenetic analyses. Considerable genetic diversity continues to be discovered in new isolates, especially from soil and benthic habitats. Twenty-nine new isolates from Great Salt Lake, Utah, many from benthic or supralittoral habitats, were phylogenetically analyzed using ITS1+5.8S+ITS2 in comparison to a broad sampling of available sequences. A few new isolates align in one branch of a bifurcated monophyletic D...
April 21, 2018: Journal of Phycology
https://www.readbyqxmd.com/read/29679120/regulation-of-hydrolytic-enzyme-activity-in-aquatic-microbial-communities-hosted-by-carnivorous-pitcher-plants
#3
Erica B Young, Jessica Sielicki, Jacob J Grothjan
Carnivorous pitcher plants Sarracenia purpurea host diverse eukaryotic and bacterial communities which aid in insect prey digestion, but little is known about the functional processes mediated by the microbial communities. This study aimed to connect pitcher community diversity with functional nutrient transformation processes, identifying bacterial taxa, and measuring regulation of hydrolytic enzyme activity in response to prey and alternative nutrient sources. Genetic analysis identified diverse bacterial taxa known to produce hydrolytic enzyme activities...
April 20, 2018: Microbial Ecology
https://www.readbyqxmd.com/read/29678979/observational-cross-sectional-study-of-nasal-staphylococcal-species-of-medical-students-of-diverse-geographical-origin-prior-to-healthcare-exposure-prevalence-of-scc-mec-fusc-fusb-and-the-arginine-catabolite-mobile-element-acme-in-the-absence-of-selective-antibiotic
#4
Paulo E Budri, Anna C Shore, David C Coleman, Peter M Kinnevey, Hilary Humpreys, Deirdre Fitzgerald-Hughes
OBJECTIVE: The aim of this study was to investigate co-located nasal Staphylococcus aureus and coagulase-negative staphylococci (CoNS) (mainly Staphylococcus epidermidis ), recovered from healthy medical students in their preclinical year, prior to exposure to the healthcare environment, for the carriage of genes and genetic elements common to both species and that may contribute to S. aureus and methicillin-resistant S. aureus (MRSA) evolution. DESIGN: Prospective observational cross-sectional study...
April 20, 2018: BMJ Open
https://www.readbyqxmd.com/read/29678917/genomic-inference-of-recombination-mediated-evolution-in-xanthomonas-euvesicatoria-and-x-perforans
#5
Mustafa O Jibrin, Neha Potnis, Sujan Timilsina, Gerald V Minsavage, Gary E Vallad, Pamela D Roberts, Jeffrey B Jones, Erica M Goss
Recombination is a major driver of evolution in bacterial populations because it can spread and combine independently evolved beneficial mutations. Recombinant lineages of plant bacterial pathogens are typically associated with colonization of novel hosts and emergence of new diseases. Here, we show that recombination between evolutionarily and phenotypically distinct plant pathogenic lineages generated recombinant lineages with unique combinations of pathogenicity and virulence factors. X. euvesicatoria ( Xe ) and X...
April 20, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29678862/natural-variation-within-a-species-for-traits-underpinning-c4-photosynthesis
#6
Gregory Reeves, Pallavi Singh, Timo A Rossberg, Deedi Sogbohossou, M Eric Schranz, Julian M Hibberd
Engineering C4 photosynthesis into C3 crops could substantially increase their yield by alleviating photorespiratory losses. This objective is challenging because the C4 pathway involves complex modifications to the biochemistry, cell biology and anatomy of leaves. Forward genetics has provided limited insight into the mechanistic basis of these properties, and there have been no reports of significant quantitative intra-specific variation of C4 attributes that would allow trait mapping. Here, we show that accessions of the C4 species Gynandropsis gynandra collected from locations across Africa and Asia exhibit natural variation in key characteristics of C4 photosynthesis...
April 20, 2018: Plant Physiology
https://www.readbyqxmd.com/read/29678354/actin-dynamics-at-focal-adhesions-a-common-endpoint-and-putative-therapeutic-target-for-proteinuric-kidney-diseases
#7
REVIEW
Sanja Sever, Mario Schiffer
Proteinuria encompasses diverse causes including both genetic diseases and acquired forms such as diabetic and hypertensive nephropathy. The basis of proteinuria is a disturbance in size selectivity of the glomerular filtration barrier, which largely depends on the podocyte: a terminally differentiated epithelial cell type covering the outer surface of the glomerulus. Compromised podocyte structure is one of the earliest signs of glomerular injury. The phenotype of diverse animal models and podocyte cell culture firmly established the essential role of the actin cytoskeleton in maintaining functional podocyte structure...
April 17, 2018: Kidney International
https://www.readbyqxmd.com/read/29678299/molecular-epidemiology-of-klebsiella-pneumoniae-k1-and-k2-isolates-in-japan
#8
Sohei Harada, Yoshikazu Ishii, Tomoo Saga, Kotaro Aoki, Kazuhiro Tateda
Although severe infections caused by hypervirulent Klebsiella pneumoniae isolates, such as K1 isolates belonging to sequence type (ST) 23, have been a significant problem in Asian countries, epidemiology of these isolates in Japan remains unclear. We performed a nationwide molecular epidemiological study of K. pneumoniae K1 and K2 isolates in Japan. Of the 259K. pneumoniae isolates collected, 14 and 16 isolates were identified as capsular genotypes K1 and K2, respectively. All K1 isolates were ST23 or its closely related clones and showed high genetic similarity by pulsed-field gel electrophoresis (PFGE) and the DiversiLab system (DL)...
March 20, 2018: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29678289/pathophysiology-of-melanocortin-receptors-and-their-accessory-proteins
#9
REVIEW
T V Novoselova, L F Chan, A J L Clark
The melanocortin receptors (MCRs) and their accessory proteins (MRAPs) are involved in regulation of a diverse range of endocrine pathways. Genetic variants of these components result in phenotypic variation and disease. The MC1R is expressed in skin and variants in the MC1R gene are associated with ginger hair color. The MC2R mediates the action of ACTH in the adrenal gland to stimulate glucocorticoid production and MC2R mutations result in familial glucocorticoid deficiency (FGD). MC3R and MC4R are involved in metabolic regulation and their gene variants are associated with severe pediatric obesity, whereas the function of MC5R remains to be fully elucidated...
April 2018: Best Practice & Research. Clinical Endocrinology & Metabolism
https://www.readbyqxmd.com/read/29678284/aberrant-g-protein-coupled-hormone-receptor-in-adrenal-diseases
#10
REVIEW
Matthieu St-Jean, Nada El Ghorayeb, Isabelle Bourdeau, André Lacroix
The regulation of cortisol or aldosterone production when ACTH of pituitary origin or the renin-angiotensin systems are suppressed in primary adrenal Cushing's syndrome or in primary aldosteronism is exerted by diverse genetic and molecular mechanisms. In addition to recently identified mutations in various genes implicated in the cyclic AMP or ion channel pathways, steroidogenesis is not really autonomous as it is frequently regulated by the aberrant adrenocortical expression of diverse hormone receptors, particularly G-protein coupled hormone receptors (GPCR) which can substitute for the normal function of ACTH or angiotensin-II...
April 2018: Best Practice & Research. Clinical Endocrinology & Metabolism
https://www.readbyqxmd.com/read/29678218/developing-inclusivity-and-exclusivity-panels-for-testing-diagnostic-and-detection-tools-targeting-burkholderia-pseudomallei-the-causative-agent-of-melioidosis
#11
Charles H D Williamson, David M Wagner, Paul Keim, Jason W Sahl
Background: Diagnostic tools designed to target Burkholderia pseudomallei , the causative agent of melioidosis that was classified as a Tier 1 Select Agent by the U.S. Centers for Disease Control and Prevention, have typically suffered from false-positive and false-negative results because of a lack of understanding of the genomic diversity of B. pseudomallei and its genetic near neighbors. Objective: In this review, we discuss a strategy for using comparative genomics to guide the design of inclusivity and exclusivity panels for the validation of assays as defined by the Standard Method Performance Requirement (SMPR®)...
April 20, 2018: Journal of AOAC International
https://www.readbyqxmd.com/read/29678141/evolving-in-the-highlands-the-case-of-the-neotropical-lerma-live-bearing-poeciliopsis-infans-woolman-1894-cyprinodontiformes-poeciliidae-in-central-mexico
#12
Rosa Gabriela Beltrán-López, Omar Domínguez-Domínguez, Rodolfo Pérez-Rodríguez, Kyle Piller, Ignacio Doadrio
BACKGROUND: Volcanic and tectonic activities in conjunction with Quaternary climate are the main events that shaped the geographical distribution of genetic variation of many lineages. Poeciliopsis infans is the only poeciliid species that was able to colonize the temperate highlands of central Mexico. We inferred the phylogenetic relationships, biogeographic history, and historical demography in the widespread Neotropical species P. infans and correlated this with geological events and the Quaternary glacial-interglacial climate in the highlands of central Mexico, using the mitochondrial genes Cytochrome b and Cytochrome oxidase I and two nuclear loci, Rhodopsin and ribosomal protein S7...
April 20, 2018: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/29677637/the-prevalence-of-molecular-markers-of-drug-resistance-in-plasmodium-vivax-from-the-border-regions-of-thailand-in-2008-and-2014
#13
Kritpaphat Tantiamornkul, Tepanata Pumpaibool, Jittima Piriyapongsa, Richard Culleton, Usa Lek-Uthai
The prevalence of Plasmodium vivax is increasing in the border regions of Thailand; one potential problem confounding the control of malaria in these regions is the emergence and spread of drug resistance. The aim of this study was to determine the genetic diversity in genes potentially linked to drug resistance in P. vivax parasites isolated from four different border regions of Thailand; Thai-Myanmar (Tak, Mae Hong Son and Prachuap Khiri Khan Provinces), and Thai-Cambodian borders (Chanthaburi Province). Isolates were collected from 345 P...
April 12, 2018: International Journal for Parasitology, Drugs and Drug Resistance
https://www.readbyqxmd.com/read/29677403/indel-variation-in-the-regulatory-region-of-the-major-flowering-time-gene-lanftc1-is-associated-with-vernalisation-response-and-flowering-time-in-narrow-leafed-lupin-lupinus-angustifolius-l
#14
Candy M Taylor, Lars G Kamphuis, Weilu Zhang, Gagan Garg, Jens D Berger, Mahsa Mousavi-Derazmahalleh, Philipp E Bayer, David Edwards, Karam B Singh, Wallace A Cowling, Matthew N Nelson
Narrow-leafed lupin (Lupinus angustifolius L.) cultivation was transformed by two dominant vernalisation-insensitive, early flowering time loci known as Ku and Julius (Jul), which allowed expansion into shorter season environments. However, reliance on these loci has limited genetic and phenotypic diversity for environmental adaptation in cultivated lupin. We recently predicted that a 1,423 bp deletion in the cis-regulatory region of LanFTc1, a FLOWERING LOCUS T (FT) homologue, de-repressed expression of LanFTc1 and was the underlying cause of the Ku phenotype...
April 20, 2018: Plant, Cell & Environment
https://www.readbyqxmd.com/read/29677185/patterning-mechanisms-diversify-neuroepithelial-domains-in-the-drosophila-optic-placode
#15
Abhishek Kumar Mishra, F Javier Bernardo-Garcia, Cornelia Fritsch, Tim-Henning Humberg, Boris Egger, Simon G Sprecher
The central nervous system develops from monolayered neuroepithelial sheets. In a first step patterning mechanisms subdivide the seemingly uniform epithelia into domains allowing an increase of neuronal diversity in a tightly controlled spatial and temporal manner. In Drosophila, neuroepithelial patterning of the embryonic optic placode gives rise to the larval eye primordium, consisting of two photoreceptor (PR) precursor types (primary and secondary), as well as the optic lobe primordium, which during larval and pupal stages develops into the prominent optic ganglia...
April 20, 2018: PLoS Genetics
https://www.readbyqxmd.com/read/29677111/genome-characterization-of-a-pathogenic-porcine-rotavirus-b-strain-identified-in-buryat-republic-russia-in-2015
#16
Konstantin P Alekseev, Aleksey A Penin, Alexey N Mukhin, Kizkhalum M Khametova, Tatyana V Grebennikova, Anton G Yuzhakov, Anna S Moskvina, Maria I Musienko, Sergey A Raev, Alexandr M Mishin, Alexandr P Kotelnikov, Oleg A Verkhovsky, Taras I Aliper, Eugeny A Nepoklonov, Diana M Herrera-Ibata, Frances K Shepherd, Douglas G Marthaler
An outbreak of enteric disease of unknown etiology with 60% morbidity and 8% mortality in weaning piglets occurred in November 2015 on a farm in Buryat Republic, Russia. Metagenomic sequencing revealed the presence of rotavirus B in feces from diseased piglets while no other pathogens were identified. Clinical disease was reproduced in experimentally infected piglets, yielding the 11 RVB gene segments for strain Buryat15, with an RVB genotype constellation of G12-P[4]-I13-R4-C4-M4-A8-N10-T4-E4-H7. This genotype constellation has also been identified in the United States...
April 20, 2018: Pathogens
https://www.readbyqxmd.com/read/29676646/ambient-air-pollution-and-clinical-implications-for-susceptible-populations
#17
Laura G Hooper, Joel D Kaufman
Air pollution is associated with a diversity of health effects, and evidence for a causal relationship with specific diseases exists. Exposure to air pollution is ubiquitous and typically beyond the control of the individual; the resulting health burden for the population can be high. Disproportionate effects are seen in individuals who have increased susceptibility to air pollution owing to individual- or community-level characteristics. As studies grow increasingly sophisticated, the understanding of who comprises the susceptible population continuously expands...
April 2018: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29676110/-species-diversity-of-ex-situ-cultivated-chinese-medicinal-plants
#18
Ling Que, Xiu-Lian Chi, Chun-Xin Zang, Yu Zhang, Min Chen, Guang Yang, An-Qi Jin
Ex-situ conservation is an important means to protect biological genetic resources. Resource protection has received more and more attention with the continuous improvement of the comprehensive utilization of traditional Chinese medicine resources. In this paper, the research and compilation of the species list of ex-situ cultivated medicinal plants in 12 Chinese Academy of Sciences botanic gardens and 19 specialized medicinal botanic gardens in China were carried out. Based on the Species 2000(2017) and other classification databases, species diversity of medicinal plants ex-situ cultivated in these botanical gardens were analyzed...
March 2018: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29676042/meta-analysis-of-chromosome-scale-crossover-rate-variation-in-eukaryotes-and-its-significance-to-evolutionary-genomics
#19
Quiterie Haenel, Telma G Laurentino, Marius Roesti, Daniel Berner
Understanding the distribution of crossovers along chromosomes is crucial to evolutionary genomics because the crossover rate determines how strongly a genome region is influenced by natural selection on linked sites. Nevertheless, generalities in the chromosome-scale distribution of crossovers have not been investigated formally. We fill this gap by synthesizing joint information on genetic and physical maps across 62 animal, plant, and fungal species. Our quantitative analysis reveals a strong and taxonomically wide-spread reduction of the crossover rate in the center of chromosomes relative to their peripheries...
April 19, 2018: Molecular Ecology
https://www.readbyqxmd.com/read/29676027/phylogenetic-analyses-of-the-genus-aeromonas-based-on-housekeeping-gene-sequencing-and-its-influence-on-systematics
#20
Aaron Navarro, Antonio Martínez-Murcia
The phylogenies derived from housekeeping gene sequence alignments, although mere evolutionary hypotheses, have increased our knowledge about the Aeromonas genetic diversity, providing a robust species delineation framework invaluable for reliable, easy and fast species identification. Previous classifications of Aeromonas, have been fully surpassed by recently developed phylogenetic (natural) classification obtained from the analysis of so-called "molecular chronometers". Despite ribosomal RNAs cannot split all known Aeromonas species, the conserved nature of 16S rRNA offers reliable alignments containing mosaics of sequence signatures which may serve as targets of genus-specific oligonucleotides for subsequent identification/detection tests in samples without culturing...
April 19, 2018: Journal of Applied Microbiology
keyword
keyword
4681
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"