Bipolar affective disorder (BP), or manic-depressive illness, is a major cause of disability and mortality worldwide. It has a lifetime prevalence of about 1% and suicide risk of about 20%. The disorder is characterised by episodes of mania or hypomania and depression, appearing in varying succession, with or without intermission. Twin, family, and adoptive studies point to a strong genetic component leading to the development of bipolar disorder, with a heritability of the order of 80%. Yet the ....Bipolar affective disorder (BP), or manic-depressive illness, is a major cause of disability and mortality worldwide. It has a lifetime prevalence of about 1% and suicide risk of about 20%. The disorder is characterised by episodes of mania or hypomania and depression, appearing in varying succession, with or without intermission. Twin, family, and adoptive studies point to a strong genetic component leading to the development of bipolar disorder, with a heritability of the order of 80%. Yet the identification of the genetic basis of the disease has proved exceedingly difficult, with numerous studies producing no definitive data. The lack of convincing results has been interpreted as an indication of complex genetic mechanisms and underlying differences between affected families and ethnic groups. Genetically isolated populations, where most individuals descend from a small number of founders, are believed to hold great potential for understanding the genetic basis of complex diseases, such as bipolar disorder. Affected subjects in such populations are likely to share the same predisposing genes, making these genes easier to identify. During the last 10 years, we have been involved in the study of bipolar disorder in one such population, with very promising results. In this project, we propose to take the research further by collecting more affected families, confirming the current positive findings and narrowing down the search to a small region, possibly a single gene. If successful, the study will be a major breakthrough which, by identifying a molecular pathway and disease mechanism, will contribute valuable and generally valid information on the biological basis of mood disorders.Read moreRead less
Developing DNA tracking methods to identify illegally logged timber products from Africa. Illegal logging causes societal and environmental forest degradation, and is a high priority for international control. This project will produce a range of DNA methods that allow the tracing of the geographic source of origin for timber products from African tropical forests that will allow producers and consumers to better market and choose their products.
Evolution, disease and extinction - using ancient and modern Deoxyribonucleic acid (DNA) to investigate molecular evolution in the Tasmanian devil. The Tasmanian devil is Australia's largest living marsupial carnivore and one of Tasmania's key tourism icons. Extinction in the wild will have long-term impacts on Tasmanian native ecosystems and economy. This study will provide critical genetic data and tools to monitor and prioritise conservation strategies, including insurance populations and dis ....Evolution, disease and extinction - using ancient and modern Deoxyribonucleic acid (DNA) to investigate molecular evolution in the Tasmanian devil. The Tasmanian devil is Australia's largest living marsupial carnivore and one of Tasmania's key tourism icons. Extinction in the wild will have long-term impacts on Tasmanian native ecosystems and economy. This study will provide critical genetic data and tools to monitor and prioritise conservation strategies, including insurance populations and disease suppression, aimed at preventing extinction. It will strengthen ongoing conservation programs carried out by the Save the Tasmanian Devil Program and will help publicise the plight of the devil both nationally and internationally.Read moreRead less
The roles of relatedness and reproductive success in complex social systems of dolphins. Theories of the role of genetic relatedness and reproductive success in mammalian social behaviour have mostly been restricted to primates and carnivores. Coexisting alternative strategies within one population of bottlenose dolphins (Shark Bay WA) offer unprecedented opportunities for such investigations. The male alliances? complexity is unparalleled outside humans, and may require new theory. Some femal ....The roles of relatedness and reproductive success in complex social systems of dolphins. Theories of the role of genetic relatedness and reproductive success in mammalian social behaviour have mostly been restricted to primates and carnivores. Coexisting alternative strategies within one population of bottlenose dolphins (Shark Bay WA) offer unprecedented opportunities for such investigations. The male alliances? complexity is unparalleled outside humans, and may require new theory. Some female lineages show tool-use - rare outside humans, and virtually unknown in marine species. Our behavioural and genetic database has exceptional size, detail and duration for marine mammals, and is most valuable if continued while known individuals' offspring reach a stage where they can be sampled.Read moreRead less
Understanding how cells compact and segregate DNA in vertebrates. How a cell compacts and divides its DNA is still a major unanswered question in biology. This project will determine the way in which a cell compacts its DNA nearly ten thousand fold to allow the faithful and accurate segregation to daughter nuclei.
Discovery Early Career Researcher Award - Grant ID: DE170100443
Funder
Australian Research Council
Funding Amount
$372,000.00
Summary
Landscape genomics to make an endangered community resilient. This project aims to use landscape genomic techniques to assess how key species of the critically endangered Box-Gum Grassy Woodland community migrate and adapt under changing environmental conditions. Changing climate and land use threaten ecological communities, and alter environments at alarming rates. When species are pushed beyond their environmental tolerances, they will migrate, adapt or face local extinction. This alteration o ....Landscape genomics to make an endangered community resilient. This project aims to use landscape genomic techniques to assess how key species of the critically endangered Box-Gum Grassy Woodland community migrate and adapt under changing environmental conditions. Changing climate and land use threaten ecological communities, and alter environments at alarming rates. When species are pushed beyond their environmental tolerances, they will migrate, adapt or face local extinction. This alteration of the community structure affects the stability and function of the ecosystem. Expected outcomes include efficient use of limited conservation resources, ensuring the long term persistence of the endangered community.Read moreRead less
Fire, bees and other disturbances: the basis for variation in genetic diversity in long-lived plants. An understanding of processes generating temporal and spatial patterns of genetic diversity in perennial plants must underpin successful conservation. Our long-term study will exploit systems in the family Proteaceae in which we have completed foundation studies. We will develop and extend molecular techniques to measure (i) genetic changes from seed to adult, (ii) gene flow by different pollina ....Fire, bees and other disturbances: the basis for variation in genetic diversity in long-lived plants. An understanding of processes generating temporal and spatial patterns of genetic diversity in perennial plants must underpin successful conservation. Our long-term study will exploit systems in the family Proteaceae in which we have completed foundation studies. We will develop and extend molecular techniques to measure (i) genetic changes from seed to adult, (ii) gene flow by different pollinator classes, and (iii) genetic contamination by foreign gene pools, in systems affected by introduced pollinators and natural and cultivar hybridization. Most importantly, we will use fire as an accelerant of generational change and test fitness consequences of changes in genotypic diversity.Read moreRead less
Mapping recombination blocks in Brassica. DNA technology provides new ways to study genomes. Understanding how the genome behaves during plant breeding will help design strategies for the breeding and selection of improved crop plants.
Testing the costs and benefits of gene flow. The mixing of individuals from different populations has traditionally been viewed as beneficial because it maintains genetic variation and offsets the deleterious effects of inbreeding. However, this practice can also have detrimental effects on the fitness of populations. In this project field and laboratory experiments will test whether the benefits gained by mixing of individuals from different populations outweigh the costs or vice versa. In add ....Testing the costs and benefits of gene flow. The mixing of individuals from different populations has traditionally been viewed as beneficial because it maintains genetic variation and offsets the deleterious effects of inbreeding. However, this practice can also have detrimental effects on the fitness of populations. In this project field and laboratory experiments will test whether the benefits gained by mixing of individuals from different populations outweigh the costs or vice versa. In addition to providing information essential for the management of endangered species, the results will provide valuable insights on the processes that determine species' ranges and how new species evolve.Read moreRead less
Environmental determinants of mass extinctions by emerging disease: why does chytridiomycosis exterminate frogs in rainforest but not in open forest? The emerging fungal disease known as chytridiomycosis is causing decline and extinctions of many species of frogs around the world; Australia is no exception. Although a threat abatement plan is currently in place, a successful management strategy to deal with this problem in the wild does not exist. In the wet tropics region of north Queensland, h ....Environmental determinants of mass extinctions by emerging disease: why does chytridiomycosis exterminate frogs in rainforest but not in open forest? The emerging fungal disease known as chytridiomycosis is causing decline and extinctions of many species of frogs around the world; Australia is no exception. Although a threat abatement plan is currently in place, a successful management strategy to deal with this problem in the wild does not exist. In the wet tropics region of north Queensland, healthy populations of torrent frogs exist in the drier areas adjacent to the rainforest where they disappeared. Understanding how they coexist with this pathogen, as well as their dispersal capacity to recolonise the rainforest is basic information necessary to aid theses species in future conservation efforts.Read moreRead less