Solving Darwin's dilemma: Molecular analysis of worker sterility in social insects. One of Darwin's greatest puzzles was how natural selection resulted in worker sterility in social insects. We now know from mathematical modelling that a gene that causes sterility in workers can be at a selective advantage if it increases the reproductive success of queens. This project will take the only known gene that causes sterility, 'Anarchy' from honey bees, and determine how this gene evolved. We will de ....Solving Darwin's dilemma: Molecular analysis of worker sterility in social insects. One of Darwin's greatest puzzles was how natural selection resulted in worker sterility in social insects. We now know from mathematical modelling that a gene that causes sterility in workers can be at a selective advantage if it increases the reproductive success of queens. This project will take the only known gene that causes sterility, 'Anarchy' from honey bees, and determine how this gene evolved. We will determine if Anarchy is the same gene that causes sterility in all social insects, or only in honey bees. The project will be at the forefront of international research by providing a molecular perspective to Darwin's greatest dilemma.
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Evolutionary venomics: Venom system diversification in the animal kingdom. This proposal represents a tremendous opportunity for biodiscovery from the Australian toxic fauna. This will be achieved through the researcher's unique approach of investigating previously unmapped venom systems for divergent, bioactive proteins. An understanding of venomous animal protein evolution has practical implications for the treatment of envenomations - an enormous problem in Australia - as well as great pot ....Evolutionary venomics: Venom system diversification in the animal kingdom. This proposal represents a tremendous opportunity for biodiscovery from the Australian toxic fauna. This will be achieved through the researcher's unique approach of investigating previously unmapped venom systems for divergent, bioactive proteins. An understanding of venomous animal protein evolution has practical implications for the treatment of envenomations - an enormous problem in Australia - as well as great potential in drug discovery and other commercial applications. This project will provide Australian graduate and post-graduate students with finely tuned skills in cutting edge methodological techniques and a fluent understanding of molecular evolution, preparing them to be internationally competitive scientists.Read moreRead less
Convergent Evolution of Desert Lizards: Phylogenomic and Morphological Analyses of Limb Development. Evolutionary convergence, where similar traits evolve independently in multiple lineages, is a fundamental biological process, which affects many aspects of an organism's morphology. Despite its importance we don't understand what underlies the convergence we observe in nature - does convergence in genetic make-up underlie convergence in morphology? We will investigate whether similar hindlimb mo ....Convergent Evolution of Desert Lizards: Phylogenomic and Morphological Analyses of Limb Development. Evolutionary convergence, where similar traits evolve independently in multiple lineages, is a fundamental biological process, which affects many aspects of an organism's morphology. Despite its importance we don't understand what underlies the convergence we observe in nature - does convergence in genetic make-up underlie convergence in morphology? We will investigate whether similar hindlimb morphologies are determined by the same genetic mechanisms in iguanian lizards of Australia and North America. Our study will be the first of its kind in vertebrates and will provide significant information about the evolutionary link between an animal's morphology and its genetic make-up.Read moreRead less
Sex, parthenogenesis and adaptation: a novel laboratory 'natural selection' experiment testing the adaptive significance of sexual and asexual reproduction. One of the greatest challenges for evolutionary biology is explaining the widespread occurrence of sexual reproduction. Many theoretical models show some inherent benefits of sex, however these models make assumptions that little or no empirical data exists for. Using a novel phenomenon found in the parasitoid wasp genus Trichogramma, I will ....Sex, parthenogenesis and adaptation: a novel laboratory 'natural selection' experiment testing the adaptive significance of sexual and asexual reproduction. One of the greatest challenges for evolutionary biology is explaining the widespread occurrence of sexual reproduction. Many theoretical models show some inherent benefits of sex, however these models make assumptions that little or no empirical data exists for. Using a novel phenomenon found in the parasitoid wasp genus Trichogramma, I will investigate the adaptive significance of sexual and asexual reproduction in a laboratory natural selection experiment and therefore directly test the theory for the evolution and maintenance of sex. This will be the first such test in a higher organism.Read moreRead less
Bacterial innovation and evolution: Molecular prospecting by targeting integrons and gene cassettes. Bacteria can respond rapidly to environmental change by acquiring new genes via lateral gene transfer. A DNA element called the integron can capture, mobilise and express genes, thereby playing a role in the transfer process. We have discovered that integrons are surprisingly abundant in the environment and are associated with a hitherto unsuspected diversity of novel genes. In this study we will ....Bacterial innovation and evolution: Molecular prospecting by targeting integrons and gene cassettes. Bacteria can respond rapidly to environmental change by acquiring new genes via lateral gene transfer. A DNA element called the integron can capture, mobilise and express genes, thereby playing a role in the transfer process. We have discovered that integrons are surprisingly abundant in the environment and are associated with a hitherto unsuspected diversity of novel genes. In this study we will assess the diversity of environmental integrons and examine their contribution to bacterial evolution. Further, we aim to use integron systems to prospect for novel genes and contract new enzyme pathways by directed evolution.
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The genomics of adaptation in Wolbachia pipientis, an emerging biocontrol agent. Australians are increasingly exposed to insect-transmitted diseases such as dengue fever. Novel biocontrol methods using the bacterium Wolbachia aim to control insect populations to reduce disease transmission. Our research will be the first to investigate genomic variation and the process of adaptation to new insect hosts in Wolbachia. The novel data and understanding of evolutionary processes we generate will be c ....The genomics of adaptation in Wolbachia pipientis, an emerging biocontrol agent. Australians are increasingly exposed to insect-transmitted diseases such as dengue fever. Novel biocontrol methods using the bacterium Wolbachia aim to control insect populations to reduce disease transmission. Our research will be the first to investigate genomic variation and the process of adaptation to new insect hosts in Wolbachia. The novel data and understanding of evolutionary processes we generate will be critical for screening bacterial biocontrol candidates and designing biocontrol release strategies. It will also strengthen the position of Australian research as a world-leader in the fusion of post-genomics and applied microbiology. Read moreRead less
The role of short tandem repeat DNA variation in the evolution of human psychological diversity. The proposed work addresses fundamental questions about human nature. It ties together the evolutionary processes that have shaped us as a species with the way our genes influence: our personalities, the way we think and how we behave. It introduces a novel approach to addressing questions about the role of genetics in human variation that will contribute substantially to the way we understand, perce ....The role of short tandem repeat DNA variation in the evolution of human psychological diversity. The proposed work addresses fundamental questions about human nature. It ties together the evolutionary processes that have shaped us as a species with the way our genes influence: our personalities, the way we think and how we behave. It introduces a novel approach to addressing questions about the role of genetics in human variation that will contribute substantially to the way we understand, perceive and manage important aspects of human diversity.Read moreRead less
Evolutionary genetics of the immune system in social insects. Insects possess efficient innate immunity against pathogens, but social insects are suggested to be vulnerable due to their packed colonies of related individuals. We predict that pathogen pressure varies with life history and microhabitat details, and that this variation will be reflected in the molecular evolutionary rates of immune system genes. Sequence information will be obtained to test these predictions. The results should ....Evolutionary genetics of the immune system in social insects. Insects possess efficient innate immunity against pathogens, but social insects are suggested to be vulnerable due to their packed colonies of related individuals. We predict that pathogen pressure varies with life history and microhabitat details, and that this variation will be reflected in the molecular evolutionary rates of immune system genes. Sequence information will be obtained to test these predictions. The results should be of widespread interest as reflecting the importance of pathogens and life pattern, and increase our knowledge of insect immune systems, potentially enabling circumvention of pest defenses and better protection of beneficial species.Read moreRead less
Evolutionary immunology of social insects. Social insects are particularly abundant in Australia. They live in a wide range of habitats with social systems differing greatly in size and structure. They are both ecologically and economically important because they form a large part of terrestrial ecosystems and control much of the energy flow. Their immune system resembles the immune system of humans. Finding how the social insect immune system evolves will have the potential to help us manag ....Evolutionary immunology of social insects. Social insects are particularly abundant in Australia. They live in a wide range of habitats with social systems differing greatly in size and structure. They are both ecologically and economically important because they form a large part of terrestrial ecosystems and control much of the energy flow. Their immune system resembles the immune system of humans. Finding how the social insect immune system evolves will have the potential to help us manage them better, and yield functional insights into the human innate immune system. Placing the observed patterns in context also involves study of the associated microbes, finds how social insects interact with this important part of the environment, and may assist in land management.Read moreRead less