Novel genomic technologies to improve fertility in northern beef cattle. This project aims to develop new genomic technologies to enable accelerated improvement of cow fertility. Increased global demand for beef is driving northern Australian beef enterprises to develop innovative ways to increase productivity. A substantial industry challenge is poor fertility of cows, with weaning rates frequently less than 40%. The expected outcomes of this project are an improvement in weaning rates to enabl ....Novel genomic technologies to improve fertility in northern beef cattle. This project aims to develop new genomic technologies to enable accelerated improvement of cow fertility. Increased global demand for beef is driving northern Australian beef enterprises to develop innovative ways to increase productivity. A substantial industry challenge is poor fertility of cows, with weaning rates frequently less than 40%. The expected outcomes of this project are an improvement in weaning rates to enable accelerated genetic gain for fertility in these enterprises by delivering a low cost array, which assays thousands of DNA variants affecting fertility simultaneously. This should provide significant benefits such as a new genomic prediction method informed by gene expression data from a unique resource of Brahman cattle with exceptionally high fertility, generating significant industry benefits.Read moreRead less
Genetic Basis of Variable Expression of Glycan Xeno-Autoantigens by Cattle. Meat and dairy products from cattle contain sugar structures (glycans) that are not made by humans. These structures can be recognised by the immune system and lead to allergic reactions, inflammation and potentially cancer. These non-human structures are called xeno-autoantigens or XAs. We have discovered individual cattle that do not produce one of these XAs. We will study the gene required to make XA in the XA-free ca ....Genetic Basis of Variable Expression of Glycan Xeno-Autoantigens by Cattle. Meat and dairy products from cattle contain sugar structures (glycans) that are not made by humans. These structures can be recognised by the immune system and lead to allergic reactions, inflammation and potentially cancer. These non-human structures are called xeno-autoantigens or XAs. We have discovered individual cattle that do not produce one of these XAs. We will study the gene required to make XA in the XA-free cattle to find the underlying mutation. The same approach will be used to look for natural XA-free individuals in other food species. This knowledge may enable us to create a test to facilitate the natural breeding of non-GMO, XA-free livestock to benefit Australian primary producers and provide safer food for consumers.Read moreRead less
Improving the efficiency of bovine oocyte maturation in vitro. For the dairy and beef industries, the hundreds of eggs (oocytes) in a high value cow's ovary that fail to produce a pregnancy are a wasted genetic resource. A key technology to unlocking this resource is in vitro maturation of oocytes, but the process is inefficient. One possible cause is that the current approaches to maturing oocytes in vitro do not adequately mimic the natural process in vivo. We will design new systems to matu ....Improving the efficiency of bovine oocyte maturation in vitro. For the dairy and beef industries, the hundreds of eggs (oocytes) in a high value cow's ovary that fail to produce a pregnancy are a wasted genetic resource. A key technology to unlocking this resource is in vitro maturation of oocytes, but the process is inefficient. One possible cause is that the current approaches to maturing oocytes in vitro do not adequately mimic the natural process in vivo. We will design new systems to mature cow oocytes in vitro by altering the chemical composition of maturation medium, thus improving the efficiency of laboratory embryo production and related technologies.Read moreRead less
An integrated genomics approach to improve our understanding of the biology of genital campylobacteriosis in beef cattle. Beef is Australia's most valuable agricultural export estimated at $9.6B annually and this industry accounts for one-third of full time employment in regional communities. Currently, unknown causes of reproductive losses in cattle in Northern Australian cost producers approximately $15M per annum. Bovine genital campylobacteriosis is one of the major risk factors associated w ....An integrated genomics approach to improve our understanding of the biology of genital campylobacteriosis in beef cattle. Beef is Australia's most valuable agricultural export estimated at $9.6B annually and this industry accounts for one-third of full time employment in regional communities. Currently, unknown causes of reproductive losses in cattle in Northern Australian cost producers approximately $15M per annum. Bovine genital campylobacteriosis is one of the major risk factors associated with this high cost due to the inability to accurately diagnose the disease. This research will integrate genomics and bioinformatics with infection and vaccination models to improve our understanding of the biology of the disease to develop appropriate control strategies securing Australia's beef industry.Read moreRead less
DNA methylation in IVF and cloned embryos. In vitro fertilisation (IVF) and cloning are new assisted reproductive technologies that in time will revolutionise genetic improvement of Australia's economically important animals. IVF and cloning can be associated with aberrant growth that results from atypical gene expression. DNA methylation is central to gene regulation and determines which genes are expressed. In this project a new technique will be used to quantify DNA methylation in naturall ....DNA methylation in IVF and cloned embryos. In vitro fertilisation (IVF) and cloning are new assisted reproductive technologies that in time will revolutionise genetic improvement of Australia's economically important animals. IVF and cloning can be associated with aberrant growth that results from atypical gene expression. DNA methylation is central to gene regulation and determines which genes are expressed. In this project a new technique will be used to quantify DNA methylation in naturally conceived, IVF and cloned embryos. The information will be used to improve IVF and cloning so that these technologies can be applied with confidence to increase the international competitiveness of Australia's livestock industries.Read moreRead less
Bayesian methodology for analysis of genome data with focus on the livestock industry. The aim is to develop statistical methods for the design and analysis of genome data with focus on the special needs of the livestock industry. This will significantly contribute to profitability, quality, genetic improvement and genetic knowledge in a key national industry, improve Australia's international and national profile in the key research area of bioinformatics, and encourage optimisation of current ....Bayesian methodology for analysis of genome data with focus on the livestock industry. The aim is to develop statistical methods for the design and analysis of genome data with focus on the special needs of the livestock industry. This will significantly contribute to profitability, quality, genetic improvement and genetic knowledge in a key national industry, improve Australia's international and national profile in the key research area of bioinformatics, and encourage optimisation of current information. Outcomes include a toolkit of applicable statistical methods, statistically valid algorithms, marketable methods for gene discovery, technology transfer, training and publications.Read moreRead less
Identification of causal variants for complex traits. The aim of this project is to identify causal variants for complex traits in cattle and humans. Although most important traits in agriculture, medicine and evolution are complex traits, very few of the genetic variants affecting these traits are known and this undermines our understanding of how genetic variants affect a trait and practical uses of this knowledge. Huge datasets of individuals with genome sequence and phenotypes and new statis ....Identification of causal variants for complex traits. The aim of this project is to identify causal variants for complex traits in cattle and humans. Although most important traits in agriculture, medicine and evolution are complex traits, very few of the genetic variants affecting these traits are known and this undermines our understanding of how genetic variants affect a trait and practical uses of this knowledge. Huge datasets of individuals with genome sequence and phenotypes and new statistical methods provide the opportunity to close this gap. The outcome will be identification of many genomic variants causing variation in complex traits. This will benefit scientific understanding of complex traits and the ability to predict traits for individuals from their genome sequence.Read moreRead less
Improving the diagnosis, management and control of chlamydial infections in Australian livestock. Chlamydial diseases, such as arthritis and encephalomyelitis, are associated with significant economic losses for Australian livestock producers. Effective surveillance and management of Chlamydia infections is problematic due to: the absence of epidemiological data; the lack of an accurate and easily interpretable diagnostic test; and the lack of an available vaccine. This project aims to evaluate ....Improving the diagnosis, management and control of chlamydial infections in Australian livestock. Chlamydial diseases, such as arthritis and encephalomyelitis, are associated with significant economic losses for Australian livestock producers. Effective surveillance and management of Chlamydia infections is problematic due to: the absence of epidemiological data; the lack of an accurate and easily interpretable diagnostic test; and the lack of an available vaccine. This project aims to evaluate factors associated with chlamydial disease in Australian livestock and thereby improve on-farm diagnosis. With the concomitant development of a chlamydial vaccine for sheep, this project aims to provide veterinarians and producers with important tools to reduce the on-farm impacts of chlamydial disease.Read moreRead less
Evaluation of Bacillus amyloliquefaciens H57 as a probiotic in livestock using animal nutrition studies and metagenomics. To improve animal production, gene sequencing will unravel how microbial communities in the rumen of sheep and cattle and the gastro intestinal tract of poultry respond to feed quality and probiotic bacteria. The animal nutrition trials will also measure weight gain and feed utilisation efficiency, particularly for nitrogen, protein and energy.
Subcellular co-localisation of interacting proteins that control maturation in mammalian eggs. The final maturation of mammalian eggs (oocytes) before fertilisation involves a cascade of interactions between protein kinases and phosphatases, the shuttling of these proteins between cytoplasm and nucleus, and microtubule assembly and disassembly. In this project we have proposed that interacting proteins involved in oocyte maturation are co-localised at subcellular sites in oocytes, in a strict t ....Subcellular co-localisation of interacting proteins that control maturation in mammalian eggs. The final maturation of mammalian eggs (oocytes) before fertilisation involves a cascade of interactions between protein kinases and phosphatases, the shuttling of these proteins between cytoplasm and nucleus, and microtubule assembly and disassembly. In this project we have proposed that interacting proteins involved in oocyte maturation are co-localised at subcellular sites in oocytes, in a strict temporal and spatial manner. The co-localisation of proteins in oocytes is considered a fundamental mechanism that ensures coordination of time-bound cellular events and proper preparation of oocytes for fertilisation and early embryo development. There are important implications for IVF and cloning by nuclear transfer.Read moreRead less