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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
Characterization of the tammar wallaby MHC. We will be able to determine the immunological fitness of marsupial populations which will help us to conserve our native fauna and protect our eco-tourism industry.
We will work in the international arena of large scale genomics and bring new technologies to Australia.
Genetic analysis of two distinct reproductive strategies in sexual and thelytokous field populations of an endoparastic wasp. Asexual (thelytokous) females of an insect parasitoid, Venturia canescens, which develop inside another insect, exhibit evolutionarily stable mixtures of life-history strategies, allowing two genetically distinct wasp lines to coexist sympatrically on the same host resources. The two thelytokous lines differ in a virus-like particle protein-coding gene (VLP1), which raise ....Genetic analysis of two distinct reproductive strategies in sexual and thelytokous field populations of an endoparastic wasp. Asexual (thelytokous) females of an insect parasitoid, Venturia canescens, which develop inside another insect, exhibit evolutionarily stable mixtures of life-history strategies, allowing two genetically distinct wasp lines to coexist sympatrically on the same host resources. The two thelytokous lines differ in a virus-like particle protein-coding gene (VLP1), which raises the question whether the VLP1 gene locus is genetically associated with the phenotype. We will investigate the genetic basis for the observed phenotypic differences, by comparing the two thelytokous lines with the corresponding homozygous VLP1-genotypes in sexual strains. The outcome will provide a molecular and genetic framework to test parthenogenetic reproduction strategies in some insect species.Read moreRead less
The ecological dynamics of secreted bacteriocins and the evolution of multiple bacteriocin production in Escherichia coli. Bacteria produce compounds known as bacteriocins that are toxic to other microorganisms. The success of bacteria as bio-control agents and in probiotic formulations for the control microbial pathogens is, in part, due to bacteriocins. Bacteriocins may also have a role as replacements for traditional antibiotics and as natural food preservatives. The potential usefulness of b ....The ecological dynamics of secreted bacteriocins and the evolution of multiple bacteriocin production in Escherichia coli. Bacteria produce compounds known as bacteriocins that are toxic to other microorganisms. The success of bacteria as bio-control agents and in probiotic formulations for the control microbial pathogens is, in part, due to bacteriocins. Bacteriocins may also have a role as replacements for traditional antibiotics and as natural food preservatives. The potential usefulness of bacteriocins as the active agent in bio-control agents, as antibiotic replacements, as food preservatives, and as part of the repertoire of traits in probiotic formulations requires a sound understanding of the eco-evolutionary dynamics of bacteriocins. Understanding the ecology and evolution of bacteriocins is the goal of the proposed research.Read moreRead less
Early life-history sex determination in reef fishes. In many fishes, gender is influenced by environmental conditions experienced after hatching. However, the timing, cues, and developmental pathways of sex determination are poorly understood. This research will establish how environmental conditions during the juvenile phase control patterns of sex determination in reef fishes and determine if sex differentiation is a response to local- or broad-scale environmental cues. An individual's gender ....Early life-history sex determination in reef fishes. In many fishes, gender is influenced by environmental conditions experienced after hatching. However, the timing, cues, and developmental pathways of sex determination are poorly understood. This research will establish how environmental conditions during the juvenile phase control patterns of sex determination in reef fishes and determine if sex differentiation is a response to local- or broad-scale environmental cues. An individual's gender has profound and significant consequences for all aspects of its biology and the mechanism of sex determination has important implications for population ecology. This project will test theory in evolutionary ecology and greatly benefit the management of reef fisheries.Read moreRead less
Genetic association studies of fundamental wood fibre components in Pinus radiata resource populations. Radiata pine is Australia's premiere softwood plantation species occupying in excess of one million hectares, contributing over $18 billion to Australia's GNP and providing employment to 130,000 Australians. With a trade deficit in forest and forest products of $1.85 billion, current massive plantation establishment efforts are in train to reverse this trend. These have to be backed by researc ....Genetic association studies of fundamental wood fibre components in Pinus radiata resource populations. Radiata pine is Australia's premiere softwood plantation species occupying in excess of one million hectares, contributing over $18 billion to Australia's GNP and providing employment to 130,000 Australians. With a trade deficit in forest and forest products of $1.85 billion, current massive plantation establishment efforts are in train to reverse this trend. These have to be backed by research into the factors that determine the base resource's quality, growth and sustainability. Results will lead to improved resource quality, increased productivity and new industrial opportunities, directly improving our trade position and releasing pressure on our native forest resources.Read moreRead less
To be cooperative or selfish: individual decisions in a model society. Understanding the basis of cooperative behaviour is a major challenge to biological and social science. Our ability to deal with problems such as global warming and the rapid loss of biodiversity, will depend upon an unprecedented level of cooperation between individuals and countries. Our work will use an animal model that shares a number of key characteristics with the societies of our early human ancestors to explore, thro ....To be cooperative or selfish: individual decisions in a model society. Understanding the basis of cooperative behaviour is a major challenge to biological and social science. Our ability to deal with problems such as global warming and the rapid loss of biodiversity, will depend upon an unprecedented level of cooperation between individuals and countries. Our work will use an animal model that shares a number of key characteristics with the societies of our early human ancestors to explore, through experiments and detailed molecular analysis, the basis of cooperative interactions between individuals. This work will uncover the key principles that drive the evolution of cooperation in society and will help us to understand the basis of one the most important components of human nature.Read moreRead less
The mechanisms and fitness consequences of nongenetic inheritance. For many decades, it was assumed that parents influence the characteristics of their offspring almost exclusively through the genes that they transmit, and this assumption forms the basis of modern genetics and evolutionary theory. However, it is becoming increasing clear that parents can also influence their offspring in many other ways, and that such 'nongenetic inheritance' can allow for the transmission of environmental influ ....The mechanisms and fitness consequences of nongenetic inheritance. For many decades, it was assumed that parents influence the characteristics of their offspring almost exclusively through the genes that they transmit, and this assumption forms the basis of modern genetics and evolutionary theory. However, it is becoming increasing clear that parents can also influence their offspring in many other ways, and that such 'nongenetic inheritance' can allow for the transmission of environmental influences across generations. Accumulating evidence suggests that nongenetic inheritance plays a crucial role in heritable diseases, and theory suggests that it can influence evolution. Following up on intriguing preliminary findings, this project will investigate the mechanisms and consequences of nongenetic inheritance.Read moreRead less
Deciphering genome function in animal development. The normal development of an embryo depends on complex and finely tuned gene regulatory mechanisms. In this Fellowship, I will use sophisticated new technologies to discover which of our 30,000 genes is important for embryonic development, reveal the roles of these genes, and identify the control mechanisms that can go awry to cause birth defects. Our research will suggest new ways to diagnose and deal with these conditions, and will be applicab ....Deciphering genome function in animal development. The normal development of an embryo depends on complex and finely tuned gene regulatory mechanisms. In this Fellowship, I will use sophisticated new technologies to discover which of our 30,000 genes is important for embryonic development, reveal the roles of these genes, and identify the control mechanisms that can go awry to cause birth defects. Our research will suggest new ways to diagnose and deal with these conditions, and will be applicable to stem cell technologies, tissue regeneration, cancer biology, conservation, pest management and livestock breeding, thus delivering significant economic and social benefits to Australia. Read moreRead less