Beyond pineal melatonin: sensing the seasons without the eye. The project will identify the causal connection between seasonal breeding in animals and a recently recognised brain biochemical pathway by applying experimental treatments mimicking seasonal environmental changes in a mutant and wild-type nematode worm model. Through experimentation we will identify useful biological targets that might be manipulated to enhance control of seasonal breeding in managed animals. With better control of r ....Beyond pineal melatonin: sensing the seasons without the eye. The project will identify the causal connection between seasonal breeding in animals and a recently recognised brain biochemical pathway by applying experimental treatments mimicking seasonal environmental changes in a mutant and wild-type nematode worm model. Through experimentation we will identify useful biological targets that might be manipulated to enhance control of seasonal breeding in managed animals. With better control of reproductive output in animals, farmers and managers can increase and/or decrease reproductive output as needed in managed species including livestock and vertebrate pests. This will enhance the use of precious land resources and minimize ecological damage from overbreeding.Read moreRead less
Improved models to understand the genomic architecture of complex traits. This project aims to improve modelling of the genetics underlying complex traits. The project will develop and test models for using genome-wide genetic data to investigate how much heritability (genetic effect) underlies traits of interest, where it lies in the genome, and how much of it is shared across traits. The new models will be implemented in statistical algorithms in a freely-available software package. This proj ....Improved models to understand the genomic architecture of complex traits. This project aims to improve modelling of the genetics underlying complex traits. The project will develop and test models for using genome-wide genetic data to investigate how much heritability (genetic effect) underlies traits of interest, where it lies in the genome, and how much of it is shared across traits. The new models will be implemented in statistical algorithms in a freely-available software package. This project expects to increase understanding of biological mechanisms, the efficiency of genetic association analyses and the accuracy of genomic prediction, including the effects of interventions. The project will adapt human models to a wider range of organisms, in particular bacteria.Read moreRead less
New insights into female reproductive tract formation and tubulogenesis. Aims: This project aims to improve our understanding of female reproductive tract formation by studying its developmental origins. Most of the female reproductive tract derives from a pair of embryonic tubes called Müllerian ducts, the formation of which is incompletely understood. Significance: Using chicken and mouse models and innovative genetic approaches, the project will undercover novel genes and cellular pathways in ....New insights into female reproductive tract formation and tubulogenesis. Aims: This project aims to improve our understanding of female reproductive tract formation by studying its developmental origins. Most of the female reproductive tract derives from a pair of embryonic tubes called Müllerian ducts, the formation of which is incompletely understood. Significance: Using chicken and mouse models and innovative genetic approaches, the project will undercover novel genes and cellular pathways in Müllerian duct formation. Expected outcomes: This work will enhance knowledge in the biological sciences, in the area of female reproduction and how tubes form in biological systems. Benefits: It will train research scientists, develop collaborations and enhance Australia’s high standing in the field of reproduction.Read moreRead less
HEN1 is a regulator of piRNA metabolism, transcriptional regulation and mammalian male fertility. This project is to define the biochemistry of a previously uncharacterized protein in male fertility using a unique mouse model and innovative DNA and protein technologies. This project will define a novel, and essential, pathway for male fertility and may ultimately have relevance to the maintenance of health or improving fertility.
The Cape honey bee and the origins of virgin birth. Using honeybees, the aim is to show how a mutation in a single gene creates a new species. This gene causes a shift from sexual to asexual reproduction, allowing workers to clone themselves (virgin birth), thus turning a formerly cooperative species into a social cancer. Observing a real-time speciation event driven by a single gene is an incredibly rare opportunity and enables this project to determine the socio-genetic mechanisms that reduce ....The Cape honey bee and the origins of virgin birth. Using honeybees, the aim is to show how a mutation in a single gene creates a new species. This gene causes a shift from sexual to asexual reproduction, allowing workers to clone themselves (virgin birth), thus turning a formerly cooperative species into a social cancer. Observing a real-time speciation event driven by a single gene is an incredibly rare opportunity and enables this project to determine the socio-genetic mechanisms that reduce gene flow between neighbouring populations and to explain how expression of the gene is regulated. Further, because clonal reproduction often leads to invasiveness in social insects - a dangerous outcome - understanding the origins of virgin birth is also critical to understanding invasiveness.Read moreRead less
How do mammalian germ cells transition from mitosis to meiosis? This project aims to determine how germ cells are regulated in the mammalian embryo. Germ cells go on to form the sperm and eggs and are, therefore, critical for reproduction. In particular, this project expects to generate new knowledge about the process of meiosis, a cellular process that is specific to the germ cells. Expected outcomes will inform efforts to control fertility and infertility in livestock, humans and other mammali ....How do mammalian germ cells transition from mitosis to meiosis? This project aims to determine how germ cells are regulated in the mammalian embryo. Germ cells go on to form the sperm and eggs and are, therefore, critical for reproduction. In particular, this project expects to generate new knowledge about the process of meiosis, a cellular process that is specific to the germ cells. Expected outcomes will inform efforts to control fertility and infertility in livestock, humans and other mammalian animals (e.g. pets and endangered species). They are also likely to inform the discipline of stem cell biology in general.Read moreRead less
Estimating genotype-environment interaction using genomic information. This project aims to develop statistical methods that can explore genotype–environment interaction at the genomic level using genome-wide single nucleotide polymorphisms or sequence data. It plans to estimate how the effects of genetic variants change with changing environmental conditions and how overall genetic variance changes due to changing effects in specific gene regions. It plans to deliver statistical models and meth ....Estimating genotype-environment interaction using genomic information. This project aims to develop statistical methods that can explore genotype–environment interaction at the genomic level using genome-wide single nucleotide polymorphisms or sequence data. It plans to estimate how the effects of genetic variants change with changing environmental conditions and how overall genetic variance changes due to changing effects in specific gene regions. It plans to deliver statistical models and methods and an efficient algorithm implemented in software, which would broadly benefit the field of complex trait genetics. Methods to estimate genotype–environment interaction effects at the genomic level would help elucidate complex biological systems, including human genetic response to changing environmental factors and the potential adaptation of animals to changing environmental conditions.Read moreRead less
The makings of maleness: molecular and cellular functions of the Y-chromosomal sex-determining gene Sry. This project will reveal how the Y chromosome directs male development, identify steps that can go wrong, and suggest ways to diagnose and manage intersex conditions. It will also inform stem cell, pest management, wildlife conservation and livestock breeding technologies.
Genetic control of germline progenitor cell heterogeneity and fate. Tissue maintenance in adults is dependent on resident stem cells, defined by self-renewal and differentiation capabilities. It is apparent that stem cell populations are heterogeneous, being composed of subpopulations with distinct properties. The functional significance of these subsets and mechanisms that control their divergent characteristics are unclear. Using germline stem cells from mice as a model, stem cell subsets have ....Genetic control of germline progenitor cell heterogeneity and fate. Tissue maintenance in adults is dependent on resident stem cells, defined by self-renewal and differentiation capabilities. It is apparent that stem cell populations are heterogeneous, being composed of subpopulations with distinct properties. The functional significance of these subsets and mechanisms that control their divergent characteristics are unclear. Using germline stem cells from mice as a model, stem cell subsets have been identified based on differential expression of the pluripotency gene Pou5f1. This project aims to define functional characteristics of these subpopulations and to dissect transcription factor networks controlling their development. This promises important insights into understandings of adult stem cell regulation.Read moreRead less
Genetic control of spermatogenesis: defining the role of SOX3 in spermatogonial progenitor cells. The transcription factor (TF) SOX3 is a key regulator of neural stem/progenitor cells. Recently, this project has also shown that SOX3 is active in sperm progenitors (spermatogonia) and is required for spermatogenesis. Using our Sox3 KO mouse model and extensive expertise in spermatogonial cell culture, ChIP-seq technology and bioinformatics, this project will investigate crucial aspects of SOX3 fun ....Genetic control of spermatogenesis: defining the role of SOX3 in spermatogonial progenitor cells. The transcription factor (TF) SOX3 is a key regulator of neural stem/progenitor cells. Recently, this project has also shown that SOX3 is active in sperm progenitors (spermatogonia) and is required for spermatogenesis. Using our Sox3 KO mouse model and extensive expertise in spermatogonial cell culture, ChIP-seq technology and bioinformatics, this project will investigate crucial aspects of SOX3 function in the testes including stem versus progenitor cell activity and genome-wide target gene regulation. These studies will uncover the molecular and cellular mechanism by which SOX3 controls spermatogenesis and provide unique insight into how a single TF controls context-dependent differentiation in sperm versus brain progenitor cells.Read moreRead less