7 Works

Data from: Fitness and morphological outcomes of many generations of hybridization in the copepod Tigriopus californicus

Victoria L. Pritchard, Suzanne Edmands, Jennifer Zieba, Vanessa L. Knutson & Melisa Lee
Hybridization between genetically divergent populations is an important evolutionary process, with an outcome that is difficult to predict. We used controlled crosses and freely mating hybrid swarms, followed for up to 30 generations, to examine the morphological and fitness consequences of interpopulation hybridization in the copepod Tigriopus californicus. Patterns of fitness in two generations of controlled crosses were partly predictive of long-term trajectories in hybrid swarms. For one pair of populations, controlled crosses revealed neutral...

Data from: The genomic trajectory of hybrid swarms: outcomes of repeated crosses between populations of Tigriopus californicus

Victoria L. Pritchard & Suzanne Edmands
Introgressive hybridization between genetically divergent populations is an important evolutionary process. The degree to which repeated hybridization events between the same parental taxa lead to similar genomic outcomes is unknown. This study addressed this question by following genomic trajectories of replicate hybrid swarms of the copepod Tigriopus californicus over many generations of free mating. Swarm composition was determined both by differential reproductive success of founder individuals and subsequent selection on hybrid genotypes. For one cross,...

Data from: Polymorphism pattern at a Miniature Inverted-repeat Transposable Element locus downstream of the domestication gene Teosinte-branched1 in wild and domesticated pearl millet

Yann Dussert, Marie-Stanislas Remigereau, Michael C. Fontaine, Alodie Snirc, Ghayas Lakis, Solenn Stoeckel, Thierry Langin, Aboubakry Sarr, Thierry Robert & M.-S. Remigereau
Unraveling the mechanisms involved in adaptation to understand plant morphological evolution is a challenging goal. For crop species, identification of molecular causal polymorphisms involved in domestication traits are central to this issue. Pearl millet, a domesticated grass mostly found in semi-arid areas of Africa and India, is an interesting model to address this topic: the domesticated form shares common derived phenotypes with some other cereals such as a decreased ability to develop basal and axillary...

Data from: Genetic variation in the Yolk protein expression network of Drosophila melanogaster: sex-biased negative correlations with longevity

Aaron M. Tarone, Lauren M. Mcintyre, Lawrence G. Harshman & Sergey V. Nuzhdin
One of the persistent problems in biology is understanding how genetic variation contributes to phenotypic variation. Associations at many levels have been reported, and yet causal inference has remained elusive. We propose to rely on the knowledge of causal relationships established by molecular biology approaches. The existing molecular knowledge forms a firm backbone upon which hypotheses connecting genetic variation, transcriptional variation and phenotypic variation can be built. The sex determination pathway is a well-established molecular...

Data from: Genomic basis of life history evolution in Drosophila melanogaster

Silvia C. Remolina, Peter L. Chang, Jeff Leips, Sergey V. Nuzhdin & Kimberly A. Hughes
Natural diversity in aging and other life history patterns is a hallmark of organismal variation. Related species, populations, and individuals within populations show genetically based variation in life span and other aspects of age-related performance. Population differences are especially informative because these differences can be large relative to within-population variation and because they occur in organisms with otherwise similar genomes. We used experimental evolution to produce populations divergent for life span and late-age fertility and...

Data from: Nonadditive indirect effects of group genetic diversity on larval viability in Drosophila melanogaster imply key role of maternal decision-making

Julia B. Saltz, Evan T. Alicuben, Jessica Grubman, Matthew Harkenrider, Nichelle Megowan & Sergey V. Nuzhdin
Genetic variation can have important consequences for populations: high population genetic diversity is typically associated with ecological success. Some mechanisms that account for these benefits assume that local social groups with high genetic diversity are more successful than low-diversity groups. At the same time, active decision-making by individuals can influence group genetic diversity, a behavioral process not generally incorporated into discussions of population-level diversity effects. Here, we examine how maternal decisions that determine group genetic...

Data from: Environmental stress increases selection against and dominance of deleterious mutations in inbred families of the Pacific oyster Crassostrea gigas

Louis V. Plough
The deleterious effects of inbreeding are well documented and of major concern in conservation biology. Stressful environments have generally been shown to increase inbreeding depression; however, little is known about the underlying genetic mechanisms of the inbreeding-by-stress interaction and to what extent the fitness of individual deleterious mutations is altered under stress. Using microsatellite marker segregation data and quantitative trait locus (QTL) mapping methods, I performed a genome scan for deleterious mutations affecting viability (viability...

Registration Year

  • 2012
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Resource Types

  • Dataset
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Affiliations

  • University of Southern California
    7
  • Texas A&M University
    1
  • French National Institute for Agricultural Research
    1
  • University of Paris-Sud
    1
  • Paris Diderot University
    1
  • University of Maryland, Baltimore County
    1
  • University of Florida
    1
  • Genetics, Diversity and Ecophysiology of Cereals
    1
  • University of Nebraska - Lincoln
    1
  • University of Illinois at Urbana Champaign
    1