Breaking selective constraints: is Hsp90 a capacitor of evolutionary change? Gene action and expression can be modulated by genetic mechanisms. If a general mechanism controlling gene expression exists that can be easily manipulated it has the potential to allow animal and plant breeders to quickly produce and select for new characters of agricultural importance without relying on transgenics and long-term breeding programs. It would also assist in the development of tools for identifying and de ....Breaking selective constraints: is Hsp90 a capacitor of evolutionary change? Gene action and expression can be modulated by genetic mechanisms. If a general mechanism controlling gene expression exists that can be easily manipulated it has the potential to allow animal and plant breeders to quickly produce and select for new characters of agricultural importance without relying on transgenics and long-term breeding programs. It would also assist in the development of tools for identifying and detecting genes that increase susceptibility to human diseases, such as cancer, that are only expressed under certain conditions environmental. I intend to determine whether the protein Hsp90 represents a general mechanism controlling gene expression. Read moreRead less
Adaptive evolution of mutual mate preferences in nature. Working at the interface of evolution, genetics and the environment, our research combines top scientists from Australia and abroad to seek a comprehensive understanding of the origins of biodiversity, and the evolution of new species. Such knowledge is essential if we wish to predict, and hopefully minimise, the loss of biodiversity through human-mediated environmental change. Using a native Australian insect, we are investigating the evo ....Adaptive evolution of mutual mate preferences in nature. Working at the interface of evolution, genetics and the environment, our research combines top scientists from Australia and abroad to seek a comprehensive understanding of the origins of biodiversity, and the evolution of new species. Such knowledge is essential if we wish to predict, and hopefully minimise, the loss of biodiversity through human-mediated environmental change. Using a native Australian insect, we are investigating the evolutionary consequences of the choice individuals make when selecting a mate. In addition to its role in the origin and maintenance of biodiversity, these choices can have fundamental effects on adaptation to changing environments and the long-term persistence of endangered populations.Read moreRead less
Mapping Speciation Genes. Although Darwin's seminal work was entitled "On the Origin of Species", how new species arise is still poorly understood. Modern genetic techniques and quantitative trait loci analysis (QTLs) potentially allow the characterization of the genetic basis of traits directly involved in the speciation process. I intend to conduct two complementary QTL analyses of reproductive isolation in the Drosophila serrata complex. The first will determine the genetic basis of reproduc ....Mapping Speciation Genes. Although Darwin's seminal work was entitled "On the Origin of Species", how new species arise is still poorly understood. Modern genetic techniques and quantitative trait loci analysis (QTLs) potentially allow the characterization of the genetic basis of traits directly involved in the speciation process. I intend to conduct two complementary QTL analyses of reproductive isolation in the Drosophila serrata complex. The first will determine the genetic basis of reproductive isolation between D. serrata and D. birchii, while the second will determine if the same loci are currently under natural selection in D. serrata populations that are sympatric with D. birchii.Read moreRead less
Natural Selection on Mate Recognition in Field Populations of Drosophila serrata. Natural selection on mate recognition is thought to play an important role in the process of speciation. Stronger mating discrimination between closely related species in areas where their distributions overlap, referred to as reproductive character displacement, suggests that mate recognition has been reinforced by natural selection. Drosophila serrata displays reproductive character displacement in areas where ....Natural Selection on Mate Recognition in Field Populations of Drosophila serrata. Natural selection on mate recognition is thought to play an important role in the process of speciation. Stronger mating discrimination between closely related species in areas where their distributions overlap, referred to as reproductive character displacement, suggests that mate recognition has been reinforced by natural selection. Drosophila serrata displays reproductive character displacement in areas where it occurs alongside the congener D. birchii. Using a combination of molecular and quantitative genetic techniques I will investigate how reproductive character displacement has evolved in natural populations of D. serrata. Specifically, the role that natural selection has played in generating this pattern will be evaluated.Read moreRead less
Additive and non-additive genetic benefits of mating behaviour: a synthesis of sexual selection and conservation genetics. This research will forge a synthesis between the study of mating behaviour and it's consequences (sexual selection) and the field of conservation genetics. It will have direct relevance to conservation attempts, and far-reaching implications for how we understand sexual behaviour and the complex mating decisions animals and humans make. The work will enhance Australia's stro ....Additive and non-additive genetic benefits of mating behaviour: a synthesis of sexual selection and conservation genetics. This research will forge a synthesis between the study of mating behaviour and it's consequences (sexual selection) and the field of conservation genetics. It will have direct relevance to conservation attempts, and far-reaching implications for how we understand sexual behaviour and the complex mating decisions animals and humans make. The work will enhance Australia's strong research reputation in evolutionary genetics, sexual selection and conservation biology.Read moreRead less
MULTIVARIATE QUANTITATIVE GENETICS AND THE LEK PARADOX. This research program as the potential to change the way evolutionary biologists view how selection changes the available patterns of genetic variance and covariance. In particular, it will highlight the possibility that a lack of genetic variance in multi-trait systems may be an important mechanism that limits the response to selection. It is therefore addresses a fundamental problem in quantitative genetics that underlies selection li ....MULTIVARIATE QUANTITATIVE GENETICS AND THE LEK PARADOX. This research program as the potential to change the way evolutionary biologists view how selection changes the available patterns of genetic variance and covariance. In particular, it will highlight the possibility that a lack of genetic variance in multi-trait systems may be an important mechanism that limits the response to selection. It is therefore addresses a fundamental problem in quantitative genetics that underlies selection limits in evolution and agriculture.Read moreRead less
Genetical Genomics of Mutational Variance. Mutation is the ultimate source of all genetic variation. Understanding the nature of mutation, its frequency, the distribution of effects, and the forces of selection that remove mutational load from populations is therefore a central concern of genetics. The accumulation of mutational load both in endangered species and human populations, where the natural forces of selection tend not to operate, has the potential to create serious problems in these p ....Genetical Genomics of Mutational Variance. Mutation is the ultimate source of all genetic variation. Understanding the nature of mutation, its frequency, the distribution of effects, and the forces of selection that remove mutational load from populations is therefore a central concern of genetics. The accumulation of mutational load both in endangered species and human populations, where the natural forces of selection tend not to operate, has the potential to create serious problems in these populations. The goal is to understand what types of mutations are targeted by selection at the gene expression level and why.Read moreRead less
The Genomic Dimensionality of the Response to Natural Selection. Many future advances in agriculture and medicine, as well as an understanding of adaptive evolution in natural and pest populations will require discovering the genes that regulate the expression of complex traits. Microarray technology is at the forefront of modern genomics, but despite its promise, is currently restricted in its utility by significant analytical problems associated with the analysis of the large number of gene ex ....The Genomic Dimensionality of the Response to Natural Selection. Many future advances in agriculture and medicine, as well as an understanding of adaptive evolution in natural and pest populations will require discovering the genes that regulate the expression of complex traits. Microarray technology is at the forefront of modern genomics, but despite its promise, is currently restricted in its utility by significant analytical problems associated with the analysis of the large number of gene expression profiles and their interpretation. Analytical approaches will be developed that will substantially enhance the ability of transcriptional profiling to effectively uncover key genes underlying important phenotypes of interest across the biological and medical sciences.Read moreRead less
Does divergent natural selection drive the early stages of speciation? Australia is a megadiverse country containing more than one million species, including many endemic and endangered species. Nonetheless, human driven activities, including climate change and the introduction of invasive pests, threaten Australia's biodiversity and economic wealth. This project will test how species diversify in response to environmental differences and will provide resources to compliment efforts to better un ....Does divergent natural selection drive the early stages of speciation? Australia is a megadiverse country containing more than one million species, including many endemic and endangered species. Nonetheless, human driven activities, including climate change and the introduction of invasive pests, threaten Australia's biodiversity and economic wealth. This project will test how species diversify in response to environmental differences and will provide resources to compliment efforts to better understand the destructive effects of interbreeding between native and invasive plants. Information on the role of the environment on the origin of new species will help us manage Australia's unique biodiversity. This project will provide research training opportunities in ecology, genetics, and molecular biology.Read moreRead less
Speciation and the breakdown of coevolution during hybridisation. The preservation of Australia's biodiversity depends on understanding its origins and the mechanisms that prevent its disappearance. Interacting genes, such as those coding for the machinery of the cell, evolve together and can prevent the fusion of species during hybridisation. This occurs because the cellular machinery evolves independently in different species, leading to incompatible parts that fail in hybrids. This project wi ....Speciation and the breakdown of coevolution during hybridisation. The preservation of Australia's biodiversity depends on understanding its origins and the mechanisms that prevent its disappearance. Interacting genes, such as those coding for the machinery of the cell, evolve together and can prevent the fusion of species during hybridisation. This occurs because the cellular machinery evolves independently in different species, leading to incompatible parts that fail in hybrids. This project will investigate novel genetic mechanisms that lead to reduced hybrid survival and reproduction, and therefore to the preservation of species. Australian students will receive advanced training at the frontier where ecology, genetics, and molecular biology intersect.Read moreRead less