Effects of a natural toxin on life history and gene expression ofEisenia andrei

2014 ◽  
Vol 33 (2) ◽  
pp. 412-420 ◽  
Author(s):  
A.E. Elaine van Ommen Kloeke ◽  
Ping Gong ◽  
Jacintha Ellers ◽  
Dick Roelofs
Keyword(s):  
Gene Expression ◽  
Life History ◽  
Natural Toxin

scholarly journals Loci, genes, and gene networks associated with life history variation in a model ecological organism,Daphnia pulex(complex)

2018 ◽  
Author(s):  
Jacob W. Malcom ◽  
Thomas E. Juenger ◽  
Mathew A. Leibold
Keyword(s):  
Gene Expression ◽  
Genetic Variation ◽  
Life History ◽  
Molecular Basis ◽  
Life History Traits ◽  
Evolutionary Dynamics ◽  
Daphnia Pulex ◽  
Life History Trait ◽  
Life History Variation ◽  
Trait Variation

ABSTRACTBackgroundIdentifying the molecular basis of heritable variation provides insight into the underlying mechanisms generating phenotypic variation and the evolutionary history of organismal traits. Life history trait variation is of central importance to ecological and evolutionary dynamics, and contemporary genomic tools permit studies of the basis of this variation in non-genetic model organisms. We used high density genotyping, RNA-Seq gene expression assays, and detailed phenotyping of fourteen ecologically important life history traits in a wild-caught panel of 32Daphnia pulexclones to explore the molecular basis of trait variation in a model ecological species.ResultsWe found extensive phenotypic and a range of heritable genetic variation (~0 < H2< 0.44) in the panel, and accordingly identify 75-261 genes—organized in 3-6 coexpression modules—associated with genetic variation in each trait. The trait-related coexpression modules possess well-supported promoter motifs, and in conjunction with marker variation at trans- loci, suggest a relatively small number of important expression regulators. We further identify a candidate genetic network with SNPs in eight known transcriptional regulators, and dozens of differentially expressed genes, associated with life history variation. The gene-trait associations include numerous un-annotated genes, but also support several a priori hypotheses, including an ecdysone-induced protein and several Gene Ontology pathways.ConclusionThe genetic and gene expression architecture ofDaphnialife history traits is complex, and our results provide numerous candidate loci, genes, and coexpression modules to be tested as the molecular mechanisms that underlieDaphniaeco-evolutionary dynamics.

Annual Life History–Dependent Gene Expression in the Hypothalamus and Liver of a Migratory Songbird

2014 ◽  
Vol 29 (5) ◽  
pp. 332-345 ◽  
Author(s):  
Amit K. Trivedi ◽  
Jayant Kumar ◽  
Sangeeta Rani ◽  
Vinod Kumar
Keyword(s):  
Gene Expression ◽  
Life History ◽  
Migratory Songbird ◽  
Annual Life History

scholarly journals Interspecies Systems Biology Uncovers Metabolites Affecting C. elegans Gene Expression and Life History Traits

Cell ◽  
2014 ◽  
Vol 156 (4) ◽  
pp. 759-770 ◽  
Author(s):  
Emma Watson ◽  
Lesley T. MacNeil ◽  
Ashlyn D. Ritter ◽  
L. Safak Yilmaz ◽  
Adam P. Rosebrock ◽  
...  
Keyword(s):  
Gene Expression ◽  
Life History ◽  
Systems Biology ◽  
Life History Traits ◽  
C Elegans

scholarly journals Australian black field crickets show changes in neural gene expression associated with socially-induced morphological, life-history, and behavioral plasticity

2016 ◽  
Author(s):  
Michael Kasumovic ◽  
Zhiliang Chen ◽  
Marc R Wilkins
Keyword(s):  
Gene Expression ◽  
Life History ◽  
Developmental Plasticity ◽  
Developmental Trajectories ◽  
Field Cricket ◽  
Phenotypic Traits ◽  
Functional Relationships ◽  
Teleogryllus Commodus ◽  
Black Field ◽  
Insight Into

Background: Ecological and evolutionary model organisms have provided extensive insight into the ecological triggers, adaptive benefits, and evolution of life-history driven developmental plasticity. Despite this, we still have a poor understanding of the underlying genetic changes that occur during shifts towards different developmental trajectories. The goal of this study is to determine whether we can identify underlying gene expression patterns that can describe the different life-history trajectories individuals follow in response to social cues of competition. To do this, we use the Australian black field cricket (Teleogryllus commodus), a species with sex-specific developmental trajectories moderated by the density and quality of calls heard during immaturity. In this study, we manipulated the social information males and females could hear by rearing individuals in either calling or silent treatments. We next used RNA-Seq to develop a reference transcriptome to study changes in brain gene expression at two points prior to sexual maturation. Results: We show accelerated development in both sexes when exposed to calling; changes were also seen in growth, lifespan, and reproductive effort. Functional relationships between genes and phenotypes were apparent from ontological enrichment analysis. We demonstrate that increased phenotypic expression was often associated with the expression of a greater number of genes with similar effect, thus providing a suite of candidate genes for future research in this and other invertebrate organisms. Conclusions: Our results provide interesting insight into the genomic underpinnings of developmental plasticity. We highlight the relationship between genes of known effect and behavioral and phenotypic traits that are under strong sexual selection in Teleogryllus commodus. We also demonstrate the variation in suites of genes associated with different developmental trajectories. Our results provide the opportunity for a genomic exploration of other evolutionary theories such as condition dependence and sexual conflict.

scholarly journals Perspectives: Gene expression in fisheries management

2010 ◽  
Vol 56 (1) ◽  
pp. 157-156 ◽  
Author(s):  
Jennifer L. Nielsen ◽  
Scott A. Pavey
Keyword(s):  
Climate Change ◽  
Gene Expression ◽  
Life History ◽  
Human Disturbance ◽  
Fish Populations ◽  
Genomic Research ◽  
Functional Genes ◽  
Nucleotide Polymorphisms ◽  
Adaptive Responses ◽  
Commercial Fish

Abstract Functional genes and gene expression have been connected to physiological traits linked to effective production and broodstock selection in aquaculture, selective implications of commercial fish harvest, and adaptive changes reflected in non-commercial fish populations subject to human disturbance and climate change. Gene mapping using single nucleotide polymorphisms (SNPs) to identify functional genes, gene expression (analogue microarrays and real-time PCR), and digital sequencing technologies looking at RNA transcripts present new concepts and opportunities in support of effective and sustainable fisheries. Genomic tools have been rapidly growing in aquaculture research addressing aspects of fish health, toxicology, and early development. Genomic technologies linking effects in functional genes involved in growth, maturation and life history development have been tied to selection resulting from harvest practices. Incorporating new and ever-increasing knowledge of fish genomes is opening a different perspective on local adaptation that will prove invaluable in wild fish conservation and management. Conservation of fish stocks is rapidly incorporating research on critical adaptive responses directed at the effects of human disturbance and climate change through gene expression studies. Genomic studies of fish populations can be generally grouped into three broad categories: 1) evolutionary genomics and biodiversity; 2) adaptive physiological responses to a changing environment; and 3) adaptive behavioral genomics and life history diversity. We review current genomic research in fisheries focusing on those that use microarrays to explore differences in gene expression among phenotypes and within or across populations, information that is critically important to the conservation of fish and their relationship to humans

Sign in / Sign up

Export Citation Format

Share Document