The Effects of Larval Density on Genetic Variation and Covariation Among Life-History Traits in the Bean Weevil (Acanthoscelides obtectus Say)

1991 ◽  
Vol 5 (4) ◽  
pp. 525 ◽  
Author(s):  
N. Tucic ◽  
M. Milosevic ◽  
I. Gliksman ◽  
D. Milanovic ◽  
I. Aleksic
Keyword(s):  
Genetic Variation ◽  
Life History ◽  
Life History Traits ◽  
Larval Density ◽  
Bean Weevil ◽  
Acanthoscelides Obtectus ◽  
Acanthoscelides Obtectus Say

Laboratory Evolution of Life-History Traits in the Bean Weevil (Acanthoscelides obtectus): The Effects of Density-Dependent and Age- Specific Selection

Evolution ◽  
1997 ◽  
Vol 51 (6) ◽  
pp. 1896 ◽  
Author(s):  
Nikola Tucic ◽  
Oliver Stojkovic ◽  
Ivana Gliksman ◽  
Dragana Milanovic ◽  
Darka Seslija
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Bean Weevil ◽  
Acanthoscelides Obtectus ◽  
Laboratory Evolution ◽  
Density Dependent ◽  
Evolution Of Life ◽  
Effects Of Density

scholarly journals LABORATORY EVOLUTION OF LIFE-HISTORY TRAITS IN THE BEAN WEEVIL (ACANTHOSCELIDES OBTECTUS):THE EFFECTS OF DENSITY-DEPENDENT AND AGE-SPECIFIC SELECTION

Evolution ◽  
1997 ◽  
Vol 51 (6) ◽  
pp. 1896-1909 ◽  
Author(s):  
Nikola Tucić ◽  
Oliver Stojković ◽  
Ivana Gliksman ◽  
agana Milanović ◽  
Darka Šešlija
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Bean Weevil ◽  
Acanthoscelides Obtectus ◽  
Laboratory Evolution ◽  
Density Dependent ◽  
Evolution Of Life ◽  
Effects Of Density

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.

scholarly journals The Heritability of Behavior: A Meta-analysis

2019 ◽  
Vol 110 (4) ◽  
pp. 403-410 ◽  
Author(s):  
Ned A Dochtermann ◽  
Tori Schwab ◽  
Monica Anderson Berdal ◽  
Jeremy Dalos ◽  
Raphaël Royauté
Keyword(s):  
Genetic Variation ◽  
Life History ◽  
Life History Traits ◽  
Meta Analysis ◽  
Behavioral Responses ◽  
Relative Effect ◽  
Biologically Relevant ◽  
Sources Of Variation ◽  
High Heritability ◽  
Relevant Factors

AbstractThe contribution of genetic variation to phenotypes is a central factor in whether and how populations respond to selection. The most common approach to estimating these influences is via the calculation of heritabilities, which summarize the contribution of genetic variation to phenotypic variation. Heritabilities also indicate the relative effect of genetic variation on phenotypes versus that of environmental sources of variation. For labile traits like behavioral responses, life history traits, and physiological responses, estimation of heritabilities is important as these traits are strongly influenced by the environment. Thus, knowing whether or not genetic variation is present within populations is necessary to understand whether or not these populations can evolve in response to selection. Here we report the results of a meta-analysis summarizing what we currently know about the heritability of behavior. Using phylogenetically controlled methods we assessed the average heritability of behavior (0.235)—which is similar to that reported in previous analyses of physiological and life history traits—and examined differences among taxa, behavioral classifications, and other biologically relevant factors. We found that there was considerable variation among behaviors as to how heritable they were, with migratory behaviors being the most heritable. Interestingly, we found no effect of phylogeny on estimates of heritability. These results suggest, first, that behavior may not be particularly unique in the degree to which it is influenced by factors other than genetics and, second, that those factors influencing whether a behavioral trait will have low or high heritability require further consideration.

Genetic variation of two species with different life-history traits in the endangered renosterveld of South Africa - a comparative analysis ofEriocephalus africanusandHemimeris racemosa

2015 ◽  
Vol 53 (4) ◽  
pp. 447-453 ◽  
Author(s):  
Steffen Heelemann ◽  
Veronika Bäuerlein ◽  
Cornelia B. Krug ◽  
Karen J. Esler ◽  
Peter Poschlod ◽  
...  
Keyword(s):  
South Africa ◽  
Genetic Variation ◽  
Life History ◽  
Comparative Analysis ◽  
Life History Traits
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