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https://www.readbyqxmd.com/read/28548230/molecular-basis-of-social-competence-in-medaka-fish
#1
REVIEW
Teruhiro Okuyama, Saori Yokoi, Hideaki Takeuchi
Oryzias latipes (Medaka) is an established vertebrate model for studying developmental genetics, genomics, and evolutionary biology. The physiology, embryology, and genetics of this species have been extensively investigated for centuries. Medaka fish recently attracted attention in the field of social neuroscience. This review introduces recent advances in medaka behavioral studies, focusing on female mating preferences and male mate-guarding behaviors. The medaka female has the ability to discriminate male individuals and prefers to mate with socially familiar males (female mating preference)...
May 26, 2017: Development, Growth & Differentiation
https://www.readbyqxmd.com/read/28547179/telomere-length-measurement-by-qpcr-in-birds-is-affected-by-storage-method-of-blood-samples
#2
Sophie Reichert, Hannah Froy, Winnie Boner, Theresa M Burg, Francis Daunt, Robert Gillespie, Kate Griffiths, Sue Lewis, Richard A Phillips, Dan H Nussey, Pat Monaghan
Given the potential role of telomeres as biomarkers of individual health and ageing, there is an increasing interest in studying telomere dynamics in a wider range of taxa in the fields of ecology and evolutionary biology. Measuring telomere length across the lifespan in wild animal systems is essential for testing these hypotheses, and may be aided by archived blood samples collected as part of longitudinal field studies. However, sample collection, storage, and DNA extraction methods may influence telomere length measurement, and it may, therefore, be difficult to balance consistency in sampling protocol with making the most of available samples...
May 25, 2017: Oecologia
https://www.readbyqxmd.com/read/28544874/the-relative-safety-of-paternal-maternal-and-traditional-foster-care-placements
#3
Jesse J Helton, Brian B Boutwell, Michael DiBernardo
When children are placed into foster care the caseworker must give preference to an adult relative, many of whom are grandparents, over an unrelated caregiver. This kinship preference is based in evolutionary biology, which suggests that the imperative to care for a child should be greater for kin versus non-kin. However, not all kin are related to a child in the same way, and level of paternity uncertainty may influence level of care provided. For instance, maternal grandparents can be assured that they share genetic material with their grandchild, while paternal grandparents may not have the same level of certainty...
May 22, 2017: Child Abuse & Neglect
https://www.readbyqxmd.com/read/28543226/interactions-within-and-between-clades-shaped-the-diversification-of-terrestrial-carnivores
#4
Mathias M Pires, Daniele Silvestro, Tiago B Quental
A longstanding debate in evolutionary biology and paleontology is whether ecological interactions such as competition impose diversity dependence on speciation and extinction rates. Here we analyze the fossil record of terrestrial mammalian carnivores in North America and Eurasia using a Bayesian framework to assess whether their diversity dynamics were affected by diversity dependence within and between families (12 in Eurasia, 10 in North America). We found eight instances of within-clade diversity dependence suppressing speciation rates and detected between-clade effects increasing extinction rates in six instances...
May 22, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28542786/digest-strengthening-the-link-between-sexual-selection-and-color-polymorphism
#5
Thomas E White
Heritable variation is the fuel for adaptive evolution, and the processes that generate and maintain it have been the focus of intense interest since the inception of modern evolutionary biology. The level at which variation is expressed determines, in large part, the processes that maintain it. Neutral and nearly-neutral molecular variation (e.g. silent nucleotide substitutions), for example, are seldom exposed to selection, and largely evolve via genetic drift (Kimura 1984). An enduring puzzle, however, is presented by extreme variation that is exposed to and persists in the face of selection...
May 23, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28534314/rapid-molecular-sexing-of-three-spined-sticklebacks-gasterosteus-aculeatus-l-based-on-large-y-chromosomal-insertions
#6
Theo C M Bakker, Thomas Giger, Joachim G Frommen, Carlo R Largiadèr
There is a need for rapid and reliable molecular sexing of three-spined sticklebacks, Gasterosteus aculeatus, the supermodel species for evolutionary biology. A DNA region at the 5' end of the sex-linked microsatellite Gac4202 was sequenced for the X chromosome of six females and the Y chromosome of five males from three populations. The Y chromosome contained two large insertions, which did not recombine with the phenotype of sex in a cross of 322 individuals. Genetic variation (SNPs and indels) within the insertions was smaller than on flanking DNA sequences...
May 22, 2017: Journal of Applied Genetics
https://www.readbyqxmd.com/read/28527813/enhancer-evolution-and-the-origins-of-morphological-novelty
#7
REVIEW
Mark Rebeiz, Miltos Tsiantis
A central goal of evolutionary biology is to understand the genetic origin of morphological novelties-i.e. anatomical structures unique to a taxonomic group. Elaboration of morphology during development depends on networks of regulatory genes that activate patterned gene expression through transcriptional enhancer regions. We summarize recent case studies and genome-wide investigations that have uncovered diverse mechanisms though which new enhancers arise. We also discuss how these enhancer-originating mechanisms have clarified the history of genetic networks underlying diversification of genital structures in flies, limbs and neural crest in chordates, and plant leaves...
May 18, 2017: Current Opinion in Genetics & Development
https://www.readbyqxmd.com/read/28523290/complex-modular-architecture-around-a-simple-toolkit-of-wing-pattern-genes
#8
Steven M Van Belleghem, Pasi Rastas, Alexie Papanicolaou, Simon H Martin, Carlos F Arias, Megan A Supple, Joseph J Hanly, James Mallet, James J Lewis, Heather M Hines, Mayte Ruiz, Camilo Salazar, Mauricio Linares, Gilson R P Moreira, Chris D Jiggins, Brian A Counterman, W Owen McMillan, Riccardo Papa
Identifying the genomic changes that control morphological variation and understanding how they generate diversity is a major goal of evolutionary biology. In Heliconius butterflies, a small number of genes control the development of diverse wing color patterns. Here, we used full genome sequencing of individuals across the Heliconius erato radiation and closely related species to characterize genomic variation associated with wing pattern diversity. We show that variation around color pattern genes is highly modular, with narrow genomic intervals associated with specific differences in color and pattern...
2017: Nat Ecol Evol
https://www.readbyqxmd.com/read/28512224/the-general-form-of-hamilton-s-rule-makes-no-predictions-and-cannot-be-tested-empirically
#9
Martin A Nowak, Alex McAvoy, Benjamin Allen, Edward O Wilson
Hamilton's rule asserts that a trait is favored by natural selection if the benefit to others, [Formula: see text], multiplied by relatedness, [Formula: see text], exceeds the cost to self, [Formula: see text] Specifically, Hamilton's rule states that the change in average trait value in a population is proportional to [Formula: see text] This rule is commonly believed to be a natural law making important predictions in biology, and its influence has spread from evolutionary biology to other fields including the social sciences...
May 16, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28510608/the-biomphalaria-glabrata-dna-methylation-machinery-displays-spatial-tissue-expression-is-differentially-active-in-distinct-snail-populations-and-is-modulated-by-interactions-with-schistosoma-mansoni
#10
Kathrin K Geyer, Umar H Niazi, David Duval, Céline Cosseau, Chad Tomlinson, Iain W Chalmers, Martin T Swain, David J Cutress, Utibe Bickham-Wright, Sabrina E Munshi, Christoph Grunau, Timothy P Yoshino, Karl F Hoffmann
BACKGROUND: The debilitating human disease schistosomiasis is caused by infection with schistosome parasites that maintain a complex lifecycle alternating between definitive (human) and intermediate (snail) hosts. While much is known about how the definitive host responds to schistosome infection, there is comparably less information available describing the snail's response to infection. METHODOLOGY/PRINCIPLE FINDINGS: Here, using information recently revealed by sequencing of the Biomphalaria glabrata intermediate host genome, we provide evidence that the predicted core snail DNA methylation machinery components are associated with both intra-species reproduction processes and inter-species interactions...
May 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28501896/what-do-biologists-make-of-the-species-problem
#11
Bruno Pušić, Pavel Gregorić, Damjan Franjević
The concept of species is one of the core concepts in biology and one of the cornerstones of evolutionary biology, yet it is rife with conceptual problems. Philosophers of biology have been discussing the concept of species for decades, and in doing so they sometimes appeal to the views of biologists. However, their statements as to what biologists think are seldom supported by empirical data. In order to investigate what biologists actually think about the key issues related to the problem of species, we have conducted a survey on the sample of 193 biologists from the population of biologists from over 150 biology departments at universities in the US and the EU...
May 13, 2017: Acta Biotheoretica
https://www.readbyqxmd.com/read/28489269/digest-for-ecologically-similar-andean-birds-gene-flow-and-plumage-uniformity-go-hand-in-hand
#12
Sheela P Turbek
No abstract text is available yet for this article.
May 10, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28488810/one-gene-multiple-alleles-insights-into-the-microevolution-of-pigmentation-polymorphisms
#13
M Emília Santos
Understanding how phenotypic variation is generated and maintained, and the evolutionary forces that shape these processes is the main goal of evolutionary biology. Great progress has been made in uncovering the genetic basis of morphological diversity, yet little is known about both the genetics and developmental basis of discrete polymorphisms segregating in wild populations. Exploring variation in developmental mechanisms at the population level can address the long-standing question of whether the mechanisms of change are the same at the micro- and macroevolutionary scale...
May 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28488750/computing-the-extended-synthesis-mapping-the-dynamics-and-conceptual-structure-of-the-evolvability-research-front
#14
Laura Nuño de la Rosa
Since the late 1970s, the field of evolutionary biology has undergone empirical and theoretical developments that have threaten the pillars of evolutionary theory. Some evolutionary biologists have recently argued that evolutionary biology is not experiencing a paradigm shift, but an expansion of the modern synthesis. Philosophers of biology focusing on scientific practices seem to agree with this pluralistic interpretation and have argued that evolutionary theory should rather be seen as an organized network of multiple problem agendas with diverse disciplinary contributors...
May 10, 2017: Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution
https://www.readbyqxmd.com/read/28487687/evolutionary-biology-needs-wild-microbiomes
#15
REVIEW
Sarah M Hird
The microbiome is a vital component to the evolution of a host and much of what we know about the microbiome derives from studies on humans and captive animals. But captivity alters the microbiome and mammals have unique biological adaptations that affect their microbiomes (e.g., milk). Birds represent over 30% of known tetrapod diversity and possess their own suite of adaptations relevant to the microbiome. In a previous study, we showed that 59 species of birds displayed immense variation in their microbiomes and host (bird) taxonomy and ecology were most correlated with the gut microbiome...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28486572/evaluation-of-mc1r-high-throughput-nucleotide-sequencing-data-generated-by-the-1000-genomes-project
#16
Leonardo Arduino Marano, Letícia Marcorin, Erick da Cruz Castelli, Celso Teixeira Mendes-Junior
The advent of next-generation sequencing allows simultaneous processing of several genomic regions/individuals, increasing the availability and accuracy of whole-genome data. However, these new approaches may present some errors and bias due to alignment, genotype calling, and imputation methods. Despite these flaws, data obtained by next-generation sequencing can be valuable for population and evolutionary studies of specific genes, such as genes related to how pigmentation evolved among populations, one of the main topics in human evolutionary biology...
May 8, 2017: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/28484013/preferences-for-group-dominance-track-and-mediate-the-effects-of-macro-level-social-inequality-and-violence-across-societies
#17
Jonas R Kunst, Ronald Fischer, Jim Sidanius, Lotte Thomsen
Whether and how societal structures shape individual psychology is a foundational question of the social sciences. Combining insights from evolutionary biology, economy, and the political and psychological sciences, we identify a central psychological process that functions to sustain group-based hierarchies in human societies. In study 1, we demonstrate that macrolevel structural inequality, impaired population outcomes, socio-political instability, and the risk of violence are reflected in the endorsement of group hegemony at the aggregate population level across 27 countries (n = 41,824): The greater the national inequality, the greater is the endorsement of between-group hierarchy within the population...
May 8, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28482023/understanding-the-genomic-basis-of-adaptive-response-to-variable-osmotic-niches-in-freshwater-prawns-a-comparative-intraspecific-rna-seq-analysis-of-macrobrachium-australiense
#18
Azam Moshtaghi, Md Lifat Rahi, Peter B Mather, David A Hurwood
Understanding the molecular basis of adaptive response to variable environmental conditions is a central goal of evolutionary biology. Here we sought to identify potential outlier SNPs (single nucleotide polymorphisms) in three wild populations of a freshwater prawn (Macrobrachium australiense) that are exposed to differing osmotic niches by using a comparative transcriptomics approach. De novo assembly of approximately 542 million (75 nt) pair end reads collected from 10 individuals revealed 123,396 longer contigs/transcripts of variable length, that showed 97...
May 6, 2017: Journal of Heredity
https://www.readbyqxmd.com/read/28481330/spatially-resolved-transcriptome-profiling-in-model-plant-species
#19
Stefania Giacomello, Fredrik Salmén, Barbara K Terebieniec, Sanja Vickovic, José Fernandez Navarro, Andrey Alexeyenko, Johan Reimegård, Lauren S McKee, Chanaka Mannapperuma, Vincent Bulone, Patrik L Ståhl, Jens F Sundström, Nathaniel R Street, Joakim Lundeberg
Understanding complex biological systems requires functional characterization of specialized tissue domains. However, existing strategies for generating and analysing high-throughput spatial expression profiles were developed for a limited range of organisms, primarily mammals. Here we present the first available approach to generate and study high-resolution, spatially resolved functional profiles in a broad range of model plant systems. Our process includes high-throughput spatial transcriptome profiling followed by spatial gene and pathway analyses...
May 8, 2017: Nature Plants
https://www.readbyqxmd.com/read/28479743/substitutional-analysis-of-orthologous-protein-families-using-blocks
#20
Parth Sarthi Sen Gupta, Shyamashree Banerjee, Rifat Nawaz Ul Islam, Vishma Pratap Sur, Amal K Bandyopadhyay
Orthologous proteins, form due to divergence of parental sequence, perform similar function under different environmental and biological conditions. Amino acid changes at locus specific positions form hetero-pairs whose role in BLOCK evolution is yet to be understood. We involve eight protein BLOCKs of known divergence rate to gain insight into the role of hetero-pairs in evolution. Our procedure APBEST uses BLOCK-FASTA file to extract BLOCK specific evolutionary parameters such as dominantly used hetero-pair (D), usage of hetero-pairs (E), non-conservative to conservative substitution ratio (R), maximally-diverse residue (MDR), residue (RD) and class (CD) specific diversity...
2017: Bioinformation
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