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Genomic evolution of adaptive traits in the globally invasive weed Ambrosia artemisiifolia : Find an Expert : The University of Melbourne

<p> Ragweed is native to North America and is now a globally invasive weed whose pollen is extremely allergenic. Australian ragweed populations are restricted to parts of Queensland and New South Wales, potentially limited by the extent of genetic variation available for local adaptation that could facilitate its spread. Our modelling suggests that the supply of genetic variation from North America could dramatically help colonise Australia further. </p> <p> However, we have no empirical understanding of how functional variation is acquired by Australian ragweed and whether North American source populations might supply such variation in an ecological context. </p> <p> This project will connect field experiments in Toronto and genomically-informed niche modelling in Melbourne to assess the risk of ragweed becoming a superweed, able to combine multiple sources of genetic variation to expand its range. Ragweed plants from multiple origins, including Australia, planted at the University of Toronto’s field station will be characterised phenotypically and genomically to measure functional differentiation between ranges. </p> <p> Genetic mapping will identify adaptive loci, or regions of the genome involved in adaptive traits. A newly drafted pan-genome will be used to assess if these adaptive loci are found in genomic regions with high levels of structural variation, such as copy number variants or inversion, likely to reduce the effectiveness of gene flow between populations and ranges. </p> <p> This analysis will shed light on the process of adaptation to novel environments using a weed as model of accelerated evolution, and inform biosecurity models in the context of globalisation and enhanced invasion risk. </p>

findanexpert.unimelb.edu.au

Balanced polymorphism in a floral transcription factor underlies the ancient rhythm of daily sex alternation in avocado | PNAS

In avocado and certain wild relatives in Lauraceae, a highly synchronized daily rhythm of floral sex timing promotes cross-pollination between two ...

pnas.org

A noncoding SNP in ELF3 alters ELF3β expression and confers adaptation of Arabidopsis to a continental climate

A naturally occurring variant in the Arabidopsis core clock gene EARLY FLOWERING 3 alters temperature responsiveness and has been selected for in regions o

academic.oup.com

Australia is the world’s fourth-largest black truffle producer. Now scientists may have unearthed why

Understanding truffles is a ‘tricky proposition’ because most of the magic occurs underground

theguardian.com

Variable Genetic Architecture Limits Cross‐Range Genomic Prediction of Functional Traits in Invasive Common Ragweed (Ambrosia artemisiifolia)

Functional trait expression is a potentially powerful predictor of invasion success, but the reliability of trait-based predictions across populations depends on the consistency of genetic architectu...

onlinelibrary.wiley.com

Bridging developmental and statistical approaches to variation and evolution | PNAS

Phenotypic variation is the raw material for evolutionary diversification and adaptation. However, a critical gap remains in evolutionary theory be...

pnas.org

A small polymerase ribozyme that can synthesize itself and its complementary strand

The emergence of a chemical system capable of self-replication and evolution is a critical event in the origin of life. RNA polymerase ribozymes can replicate RNA, but their large size and structural ...

science.org

Details - Research Associate – Plant Phenotyping, La Trobe University

Jobs at La Trobe University

internaljobs.latrobe.edu.au

A circadian transcriptional subnetwork and EARLY FLOWERING 3 control timing of senescence and grain nutrition in bread wheat

Circadian clocks control daily and seasonal timing of physiology and development. Because of their influence on photoperiodic flowering, variants in circadian clock genes have been selected for ph...

doi.org

Homepage - Population, Evolutionary, and Quantitative Genetics Conference

Visit our website to learn more.

genetics-gsa.org

Among the Academies: Studying How Plants Adapt

How can plants adapt to their environment, and how will they be able to adapt to climate change? Those are among the biggest questions Johanna Schmitt has sought to answer during her career as a plant...

ucdavis.edu

myloasm - metagenomic assembly with (noisy) long reads

myloasm-docs.github.io

Details : Lecturer / Senior Lecturer / Associate Professor in Genomics : The University of Melbourne

Careers at The University of Melbourne

jobs.unimelb.edu.au

Australian Chief Plant Protection Officer Webinar: Biosecurity Commons | ARDC

Learn about Biosecurity Commons - an open-access, cloud-based platform for modelling and analysing biosecurity risk and response.

ardc.edu.au

Details : Lecturer or Senior Lecturer in Biotechnology : The University of Melbourne

Careers at The University of Melbourne

jobs.unimelb.edu.au

Trait genetic architecture and population structure determine model selection for genomic prediction in natural Arabidopsis thaliana populations

Abstract. Genomic prediction applies to any agro- or ecologically relevant traits, with distinct ontologies and genetic architectures. Selecting the most a

doi.org

The genome of Citrus australasica reveals disease resistance and other species specific genes - BMC Plant Biology

Background The finger lime (Citrus australasica), one of six Australian endemic citrus species shows a high natural phenotypic diversity and novel characteristics. The wide variation and unique…

doi.org

Controlling the frequency dynamics of homing gene drives for intermediate outcomes

Abstract. Gene drives have enormous potential for solving biological issues by forcing the spread of desired alleles through populations. However, to safeg

academic.oup.com

Remembering Bob Hawke, honouring Landcare and sustainable agriculture

Meet two farming families competing for the Bob Hawke Landcare Award.

theland.com.au