Targeted analysis of the arbuscular mycorrhizal symbiosis phenome in a model host, tomato. We will capitalise on our previous discovery of novel phenotypic variation in arbuscular mycorrhizas in mutant and wild-type tomato, to explore development and function of the symbiosis at the molecular-genetic level. We will clone and sequence the gene responsible for mycorrhiza-defective phenotypes to provide inferences on function and relations with other genes. We will determine if plant defence blocks ....Targeted analysis of the arbuscular mycorrhizal symbiosis phenome in a model host, tomato. We will capitalise on our previous discovery of novel phenotypic variation in arbuscular mycorrhizas in mutant and wild-type tomato, to explore development and function of the symbiosis at the molecular-genetic level. We will clone and sequence the gene responsible for mycorrhiza-defective phenotypes to provide inferences on function and relations with other genes. We will determine if plant defence blocks fungal colonisation in the mutant and/or varies with different wild-type phenotypes and explore molecular mechanisms of nutrient transfer from fungus to plant in relation to phenotypic diversity. The project will provide new insights into genome/phenome interactions controlling this widespread beneficial symbiosis.Read moreRead less
Small is beautiful: Did gene-rich regions of mammal chromosomes evolve from microchromosomes? Most birds and reptile genomes feature many tiny microchromosomes. These are not junk, as previously thought, but contain most of the genes. Mammals lack microchromosomes, but contain gene-rich regions with similar attributes. We suggest that microchromosomes originated by genome duplication, and evolved into the gene-rich regions of mammalian chromosomes. We will test this hypothesis by comparing seque ....Small is beautiful: Did gene-rich regions of mammal chromosomes evolve from microchromosomes? Most birds and reptile genomes feature many tiny microchromosomes. These are not junk, as previously thought, but contain most of the genes. Mammals lack microchromosomes, but contain gene-rich regions with similar attributes. We suggest that microchromosomes originated by genome duplication, and evolved into the gene-rich regions of mammalian chromosomes. We will test this hypothesis by comparing sequences and genes in microchromosomes of birds, reptiles and monotremes. This will clarify the origin and evolution of the ?microgenome?, establish its suitability as a model for vertebrate genome organisation, and demonstrate whether microchromosomes are the ancestors of the gene-rich regions of mammalian chromosomes.Read moreRead less
Molecular and genetic analysis of epigenetic components in a model plant. Australia is a major exporter of agricultural food crops thus producers must maintain their competitive advantage in order to compete on the world stage. Food crops unfortunately have large, complex genomes that are not sequenced and a generation time of months that makes research outcomes slow to achieve. This project proposes to utilise a model plant that has a small completely sequenced genome and a short generation tim ....Molecular and genetic analysis of epigenetic components in a model plant. Australia is a major exporter of agricultural food crops thus producers must maintain their competitive advantage in order to compete on the world stage. Food crops unfortunately have large, complex genomes that are not sequenced and a generation time of months that makes research outcomes slow to achieve. This project proposes to utilise a model plant that has a small completely sequenced genome and a short generation time making it ideal to study the fundamental biological process of RNA silencing. Discoveries and outcomes from this project may have the potential to benefit Australian crops, ecosystems and human health.Read moreRead less