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The genetic architecture of colour polymorphism and speciation. Speciation, the process by which populations diverge and become distinct, is the engine that drives biodiversity and Darwin's 'mystery of mysteries'. Speciation is accelerated in species with multiple, discrete, coexisting colour forms; yet the genetic mechanisms underpinning this pattern are not known. This project aims to identify the genes underlying different colour forms and how they are distributed across the genome. The proj ....The genetic architecture of colour polymorphism and speciation. Speciation, the process by which populations diverge and become distinct, is the engine that drives biodiversity and Darwin's 'mystery of mysteries'. Speciation is accelerated in species with multiple, discrete, coexisting colour forms; yet the genetic mechanisms underpinning this pattern are not known. This project aims to identify the genes underlying different colour forms and how they are distributed across the genome. The project plans to test the prediction that these same areas of the genome show marked divergence between lineages that are in the process of becoming distinct species. Doing so may contribute significantly to our understanding of speciation, underlying genetic mechanisms, and genes generating colour variation in vertebrates.Read moreRead less
Recombination and the genomic landscape of speciation. This project aims to evaluate how genomes become different during the origin of species by utilising an innovative system where multiple replicates of the speciation process exist. This project expects to generate knowledge in the area of speciation genetics by exploring the effects of sex, migration and selection on the diversity of hundreds of genomes from an Australian wildflower. Expected outcomes of this project include a deeper underst ....Recombination and the genomic landscape of speciation. This project aims to evaluate how genomes become different during the origin of species by utilising an innovative system where multiple replicates of the speciation process exist. This project expects to generate knowledge in the area of speciation genetics by exploring the effects of sex, migration and selection on the diversity of hundreds of genomes from an Australian wildflower. Expected outcomes of this project include a deeper understanding of the maintenance of genetic diversity in natural populations, and development of a model organism for studying the genetics and ecology of speciation. This project should provide significant benefits including enhanced capacity in evolutionary genetics in Australia.Read moreRead less
Experimental co-evolution of Yeast and E. coli. This project aims to measure the rates and genetic mechanisms of adaptation for individual species within a microbial community. Expected outcomes of this interdisciplinary project include the first genomic and phenotypic dataset of a model microbial community, and novel tools for the analysis of meta-genomic datasets. This project has the potential to transform understanding of microbial adaptation.
How males alter their mates' ageing rates and lifespans. The proposed project investigates how males affect the lifespan, ageing and subsequent reproduction of their mates. It seeks to draw on and adapt tools and approaches used in molecular genetics and physiology to test predictions from evolutionary theories of sexual conflict, life-histories and ageing in an organism of biomedical and ecological significance, the house mouse. It is expected that this approach will allow the study, in unsurpa ....How males alter their mates' ageing rates and lifespans. The proposed project investigates how males affect the lifespan, ageing and subsequent reproduction of their mates. It seeks to draw on and adapt tools and approaches used in molecular genetics and physiology to test predictions from evolutionary theories of sexual conflict, life-histories and ageing in an organism of biomedical and ecological significance, the house mouse. It is expected that this approach will allow the study, in unsurpassed detail, of the costs males impose on females via mating, insemination, territoriality and via conflict over how many offspring to have and how to invest in their care.Read moreRead less
Understanding diet designs that break life history trade-offs. The aim of this project is to understand the mechanisms by which organisms use nutrition to enhance fitness. Food availability is a key predictor of evolutionary fitness. Surprisingly, recent data shows that some key assumptions informing how these predictions are realised are not strictly correct, thus exposing a lack of important mechanistic knowledge. This project seeks to understand these mechanisms. The project plans to use nove ....Understanding diet designs that break life history trade-offs. The aim of this project is to understand the mechanisms by which organisms use nutrition to enhance fitness. Food availability is a key predictor of evolutionary fitness. Surprisingly, recent data shows that some key assumptions informing how these predictions are realised are not strictly correct, thus exposing a lack of important mechanistic knowledge. This project seeks to understand these mechanisms. The project plans to use novel genomics techniques to develop diets that support or improve fitness under circumstances such as stress or ageing, and to understand the molecular underpinnings of these improvements. Project outcomes may expand academic knowledge of fundamental nutritional biochemistry, and improve predictions of species’ responses to environmental change.Read moreRead less
Understanding evolution of dominant bacteria inhabiting the rodent gut . The gut microbiome is central to animal health and immune function, however we have an incomplete understanding of how this important symbiotic ecosystem evolved. By approaching this knowledge gap from a historical perspective and using real-time observation, this project will address how the gut community evolved with the rodent host and how members of that community respond to new selective pressures. The significance of ....Understanding evolution of dominant bacteria inhabiting the rodent gut . The gut microbiome is central to animal health and immune function, however we have an incomplete understanding of how this important symbiotic ecosystem evolved. By approaching this knowledge gap from a historical perspective and using real-time observation, this project will address how the gut community evolved with the rodent host and how members of that community respond to new selective pressures. The significance of these findings is in their capacity to inform our understanding of the relationship between host and microbe, not only within a key model system, but by extrapolation to other host-microbe systems. Read moreRead less
Evolution of defensive and predatory venom in cone snails. This project aims to determine the molecular and cellular origins and mechanisms regulating venom production and release to establish how defensive venoms evolved in cone snails. Cone snails possess a remarkable ability to rapidly and reversibly switch between separate venoms in response to predatory or defensive stimuli, implying that these are separately evolved and regulated mechanisms. The investigators hypothesise that defensive ven ....Evolution of defensive and predatory venom in cone snails. This project aims to determine the molecular and cellular origins and mechanisms regulating venom production and release to establish how defensive venoms evolved in cone snails. Cone snails possess a remarkable ability to rapidly and reversibly switch between separate venoms in response to predatory or defensive stimuli, implying that these are separately evolved and regulated mechanisms. The investigators hypothesise that defensive venoms, originally evolved in the proximal venom duct to protect against threats such as cephalopod and fish predation, have been repurposed in the proximal duct to allow predators to become prey, facilitating the switch from worm to mollusc and fish hunting. The project aims to show the broad implications for the evolution of venoms in animals and discover the regulatory mechanisms driving venom peptide expression.Read moreRead less
Exposing the complex and flexible genetic basis to polygenic adaptation: integrating population and quantitative genomic approaches. Using leading-edge genomic approaches, the project will dissect the genetic basis to adaptation across an entire species range. The results will highlight the complex nature of adaptation to environmental change and will deliver new approaches to study it in natural populations.
Adaptive plasticity and evolution: linking the genotype and the environment to understand phenotypic evolution and expression. Different environmental signals alter when and where specific genes are expressed, thereby altering the phenotype. This project will examine the differences in the timing and use of genes in response to cues of competition that result in differences between the sexes. This will increase our understanding of the role of genes in sexual evolution.
A genomic approach to understanding the maintenance of genetic variation under sexual selection. Using a model Australian species, this project will dissect the linkages between DNA sequence variation, gene expression, phenotypic traits and fitness in a natural population. Data will facilitate powerful tests of evolutionary processes thought to maintain genetic variation in complex traits.