Search results for: David C. Queller

Items from 1 to 20 out of 35 results

article

Inference of symbiotic adaptations in nature using experimental evolution

Tyler Larsen, Cara Jefferson, Anthony Bartley, Joan E. Strassmann, more

Evolution > 75 > 4 > 945 - 955

Microbes must adapt to the presence of other species, but it can be difficult to recreate the natural context for these interactions in the laboratory. We describe a method for inferring the existence of symbiotic adaptations by experimentally evolving microbes that would normally interact in an artificial environment without access to other species. By looking for changes in the fitness effects microbes...

article

The specificity of Burkholderia symbionts in the social amoeba farming symbiosis: Prevalence, species, genetic and phenotypic diversity

Tamara S. Haselkorn, Susanne DiSalvo, Jacob W. Miller, Usman Bashir, more

Molecular Ecology > 28 > 4 > 847 - 862

The establishment of symbioses between eukaryotic hosts and bacterial symbionts in nature is a dynamic process. The formation of such relationships depends on the life history of both partners. Bacterial symbionts of amoebae may have unique evolutionary trajectories to the symbiont lifestyle, because bacteria are typically ingested as prey. To persist after ingestion, bacteria must first survive phagocytosis...

article

Nancy A. Moran ‐ Recipient of the 2017 Molecular Ecology Prize

David C. Queller

Molecular Ecology > 27 > 1 > 35 - 37

article

Problems of multi-species organisms: endosymbionts to holobionts

David C. Queller, Joan E. Strassmann

Biology & Philosophy > 2016 > 31 > 6 > 855-873

The organism is one of the fundamental concepts of biology and has been at the center of many discussions about biological individuality, yet what exactly it is can be confusing. The definition that we find generally useful is that an organism is a unit in which all the subunits have evolved to be highly cooperative, with very little conflict. We focus on how often organisms evolve from two or more...

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Fine‐scale spatial ecology drives kin selection relatedness among cooperating amoebae

jeff smith, Joan E. Strassmann, David C. Queller

Evolution > 70 > 4 > 848 - 859

Cooperation among microbes is important for traits as diverse as antibiotic resistance, pathogen virulence, and sporulation. The evolutionary stability of cooperation against “cheater” mutants depends critically on the extent to which microbes interact with genetically similar individuals. The causes of this genetic social structure in natural microbial systems, however, are unknown. Here, we show...

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Which phenotypic traits of Dictyostelium discoideum farmers are conferred by their bacterial symbionts?

Debra A. Brock, Kai Jones, David C. Queller, Joan E. Strassmann

Symbiosis > 2016 > 68 > 1-3 > 39-48

The bacterial partners in symbiotic relationships with eukaryotes can have a powerful effect on the phenotypic traits of the host. Here we explore this issue using a simple model eukaryote, Dictyostelium discoideum, and its facultative bacterial symbionts. Some clones of the social amoeba D. discoideum, called farmers, maintain symbiotic relationships with certain species of bacteria while other clones,...

article

Genomic Signatures of Cooperation and Conflict in the Social Amoeba

Elizabeth A. Ostrowski, Yufeng Shen, Xiangjun Tian, Richard Sucgang, more

Current Biology > 2015 > 25 > 12 > 1661-1665

Cooperative systems are susceptible to invasion by selfish individuals that profit from receiving the social benefits but fail to contribute. These so-called “cheaters” can have a fitness advantage in the laboratory, but it is unclear whether cheating provides an important selective advantage in nature. We used a population genomic approach to examine the history of genes involved in cheating behaviors...

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Privatization and property in biology

Joan E. Strassmann, David C. Queller

Animal Behaviour > 2014 > 92 > Complete > 305-311

Organisms evolve to control, preserve, protect and invest in their own bodies. When they do likewise with external resources they privatize those resources and convert them into their own property. Property is a neglected topic in biology, although examples include territories, domiciles and nest structures, food caching, mate guarding, and the resources and partners in mutualisms. Property is important...

article

Hamiltonian Biology, from Microbes to God

Joan E. Strassmann, David C. Queller

Animal Behaviour > 2014 > 92 > Complete > 239-240

article

In the social amoeba Dictyostelium discoideum, density, not farming status, determines predatory success on unpalatable Escherichia coli

Susanne DiSalvo, Debra A Brock, Jeff Smith, David C Queller, more

BMC Microbiology > 2014 > 14 > 1 > 1-10

Background The social amoeba Dictyostelium discoideum interacts with bacteria in a variety of ways. It is a predator of bacteria, can be infected or harmed by bacteria, and can form symbiotic associations with bacteria. Some clones of D. discoideum function as primitive farmers because they carry bacteria through the normally sterile D. discoideum social stage, then release them after dispersal so...

article

DEEP SOCIALITY

David C. Queller

Evolution > 66 > 5 > 1671 - 1673

article

Mind the gap: a comparative study of migratory behavior in social amoebae

Owen M. Gilbert, Jennie J. Kuzdzal-Fick, David C. Queller, Joan E. Strassmann

Behavioral Ecology and Sociobiology > 2012 > 66 > 9 > 1291-1296

Social amoebae aggregate to form a multicellular slug that migrates some distance. Most species produce a stalk during migration, but some do not. We show that Dictyostelium giganteum, a species that produces stalk during migration, is able to traverse small gaps and utilize bacterial resources following gap traversal by shedding live cells. In contrast, we found that Dictyostelium discoideum, a species...

article

Genetic diversity in the social amoeba Dictyostelium discoideum: Population differentiation and cryptic species

Tracy E. Douglas, Marcus R. Kronforst, David C. Queller, Joan E. Strassmann

Molecular Phylogenetics and Evolution > 2011 > 60 > 3 > 455-462

The social amoeba Dictyostelium discoideum is a commonly used model organism for the study of social evolution, multicellularity, and cell biology. But the boundaries and structure of the species have not been explored. The lack of morphological traits to distinguish D. discoideum makes even knowing whether a given clone is D. discoideum a challenge. We address this with a phylogeny of a widespread...

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How social evolution theory impacts our understanding of development in the social amoeba Dictyostelium

Joan E. Strassmann, David C. Queller

Development, Growth & Differentiation > 53 > 4 > 597 - 607

Dictyostelium discoideum has been very useful for elucidating principles of development over the last 50 years, but a key attribute means there is a lot to be learned from a very different intellectual tradition: social evolution. Because Dictyostelium arrives at multicellularity by aggregation instead of through a single‐cell bottleneck, the multicellular body could be made up of genetically distinct...

article

Kin discrimination and possible cryptic species in the social amoeba Polysphondylium violaceum

Sara E Kalla, David C Queller, Andrea Lasagni, Joan E Strassmann

BMC Evolutionary Biology > 2011 > 11 > 1 > 1-11

Background The genetic diversity of many protists is unknown. The differences that result from this diversity can be important in interactions among individuals. The social amoeba Polysphondylium violaceum, which is a member of the Dictyostelia, has a social stage where individual amoebae aggregate together to form a multicellular fruiting body with dead stalk cells and live spores. Individuals can...

article

A gene’s eye view of Darwinian populations

David C. Queller

Biology & Philosophy > 2011 > 26 > 6 > 905-913

Biologists and philosophers differ on whether selection should be analyzed at the level of the gene or of the individual. In Peter Godfrey-Smith’s book, Darwinian Populations and Natural Selection, he argues that individuals can be good members of Darwinian populations, whereas genes rarely can. I take issue with parts of this view, and suggest that Godfrey-Smith’s scheme for thinking about Darwinian...

article

THE SOCIAL ORGANISM: CONGRESSES, PARTIES, AND COMMITTEES

Joan E. Strassmann, David C. Queller

Evolution > 64 > 3 > 605 - 616

We propose that what makes an organism is nearly complete cooperation, with strong control of intraorganism conflicts, and no affiliations above the level of the organism as unified as those at the organism level. Organisms can be made up of like units, which we call fraternal organisms, or different units, making them egalitarian organisms. Previous definitions have concentrated on the factors that...

article

Unicolonial ants: where do they come from, what are they and where are they going?

Heikki Helanterä, Joan E. Strassmann, Juli Carrillo, David C. Queller

Trends in Ecology & Evolution > 2009 > 24 > 6 > 341-349

Unicolonial ant populations are the most extensive cooperative units known in nature, forming networks of interconnected nests extending sometimes hundreds of kilometers. Within such a supercolony, worker altruistic behavior might be maladaptive, because it seems to aid random members of the population instead of relatives. However, recent genetic and behavioral data show that, viewed on a sufficiently...

article

Polymorphic Members of the lag Gene Family Mediate Kin Discrimination in Dictyostelium

Rocio Benabentos, Shigenori Hirose, Richard Sucgang, Tomaz Curk, more

Current Biology > 2009 > 19 > 7 > 567-572

Self and kin discrimination are observed in most kingdoms of life and are mediated by highly polymorphic plasma membrane proteins [1–7]. Sequence polymorphism, which is essential for effective recognition, is maintained by balancing selection [8–10]. Dictyostelium discoideum are social amoebas that propagate as unicellular organisms but aggregate upon starvation and form fruiting bodies with viable...

article

DNA methylation is widespread across social Hymenoptera

Marcus R. Kronforst, David C. Gilley, Joan E. Strassmann, David C. Queller

Current Biology > 2008 > 18 > 7 > R287-R288

Genomic imprinting is an epigenetic phenomenon by which the expression of a gene is influenced by the parent from which it is inherited. The evolutionary causes of imprinting are mysterious but it is likely to represent a form of within-genome conflict [1]. For instance, alleles inherited from the father and the mother will be in conflict over treatment of relatives to which they are differently related...

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Search results for: David C. Queller

Inference of symbiotic adaptations in nature using experimental evolution

The specificity of Burkholderia symbionts in the social amoeba farming symbiosis: Prevalence, species, genetic and phenotypic diversity

Nancy A. Moran ‐ Recipient of the 2017 Molecular Ecology Prize

Problems of multi-species organisms: endosymbionts to holobionts

Fine‐scale spatial ecology drives kin selection relatedness among cooperating amoebae

Which phenotypic traits of Dictyostelium discoideum farmers are conferred by their bacterial symbionts?

Genomic Signatures of Cooperation and Conflict in the Social Amoeba

Privatization and property in biology

Hamiltonian Biology, from Microbes to God

In the social amoeba Dictyostelium discoideum, density, not farming status, determines predatory success on unpalatable Escherichia coli

DEEP SOCIALITY

Mind the gap: a comparative study of migratory behavior in social amoebae

Genetic diversity in the social amoeba Dictyostelium discoideum: Population differentiation and cryptic species

How social evolution theory impacts our understanding of development in the social amoeba Dictyostelium

Kin discrimination and possible cryptic species in the social amoeba Polysphondylium violaceum

A gene’s eye view of Darwinian populations

THE SOCIAL ORGANISM: CONGRESSES, PARTIES, AND COMMITTEES

Unicolonial ants: where do they come from, what are they and where are they going?

Polymorphic Members of the lag Gene Family Mediate Kin Discrimination in Dictyostelium

DNA methylation is widespread across social Hymenoptera

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