A5024901049- Genetic diversity and population structure
- Plant and animal studies
- Forest Insect Ecology and Management
- Ecology and Vegetation Dynamics Studies
- Species Distribution and Climate Change
- Forest ecology and management
- Plant Pathogens and Resistance
- Environmental DNA in Biodiversity Studies
- Genomics and Phylogenetic Studies
- Plant Ecology and Taxonomy Studies
- Biological Control of Invasive Species
- Plant biochemistry and biosynthesis
- Plant Water Relations and Carbon Dynamics
- Tree-ring climate responses
- Genetic and phenotypic traits in livestock
- Plant Taxonomy and Phylogenetics
- Plant Parasitism and Resistance
- Weed Control and Herbicide Applications
- Chromosomal and Genetic Variations
University of British Columbia
2013-2023
Monash University
2016-2022
Australian Regenerative Medicine Institute
2020
When confronted with an adaptive challenge, such as extreme temperature, closely related species frequently evolve similar phenotypes using the same genes. Although repeated evolution is thought to be less likely in highly polygenic traits and distantly species, this has not been tested at genome scale. We performed a population genomic study of convergent local adaptation among two lodgepole pine interior spruce. identified suite 47 genes, enriched for duplicated variants associated spatial...
Abstract Adaptation is the central feature and leading explanation for evolutionary diversification of life. also notoriously difficult to study in nature, owing its complexity logistically prohibitive timescale. Here, we leverage extensive contemporary historical collections Ambrosia artemisiifolia —an aggressively invasive weed primary cause pollen-induced hayfever—to track phenotypic genetic causes recent local adaptation across native ranges North America Europe, respectively. Large...
Admixture between differentiated populations is considered to be a powerful mechanism stimulating the invasive success of some introduced species. It generally facilitated through multiple introductions; however, importance admixture prior introduction has rarely been considered. We assess likelihood that Ambrosia artemisiifolia Europe and Australia developed introductions or were sourced from historical zone within native North America. To do this, we combine large genomic sampling data...
Sequence capture is a flexible tool for generating reduced representation libraries, particularly in species with massive genomes. We used an exome approach to sequence the gene space of two dominant Canadian boreal and montane forests - interior spruce (Picea glauca x engelmanii) lodgepole pine (Pinus contorta). Transcriptome data generated RNA-seq were coupled draft genome sequences design baits corresponding 26 824 genes from 28 649 spruce. A total 579 samples 631 included, as well...
Invasive species are a key driver of the global biodiversity crisis, but drivers invasiveness, including role pathogens, remain debated. We investigated genomic basis invasiveness in Ambrosia artemisiifolia (common ragweed), introduced to Europe late 19th century, by resequencing 655 ragweed genomes, 308 herbarium specimens collected up 190 years ago. In invasive European populations, we found selection signatures defense genes and lower prevalence disease-inducing plant pathogens. Together...
Abstract Although the evolutionary and ecological processes that contribute to plant invasion have been focus of much research, investigation into molecular basis is just beginning. Common ragweed ( A mbrosia artemisiifolia ) an annual weed native North merica has introduced E urope where it become invasive. Using a custom‐designed N imble G en oligoarray, we examined differences in gene expression between five six populations common three different environments (control, light stress...
The evolutionary and genomic determinants of sequence evolution in conifers are poorly understood, previous studies have found only limited evidence for positive selection. Using RNAseq data, we compared gene expression profiles to patterns divergence polymorphism 44 seedlings lodgepole pine (Pinus contorta) 39 interior spruce (Picea glauca × engelmannii) elucidate the forces that shape their genomes plastic responses abiotic stress. We rapidly diverging genes tend greater divergence, lower...
Summary Species respond to environmental stress through a combination of genetic adaptation and phenotypic plasticity, both which may be important for survival in the face climatic change. By characterizing molecular basis plastic responses comparing patterns among species, it is possible identify how such traits evolve. Here, we used de novo transcriptome assembly RNA seq explore gene expression differ response temperature, moisture, light regime treatments lodgepole pine ( P inus contorta...
Biological invasions offer a unique opportunity to investigate evolution over contemporary timescales. Rapid adaptation local climates during range expansion can be major determinant of invasion success, yet fundamental questions remain about its genetic basis. This study sought the basis climate in invasive common ragweed (
Summary Introduced populations often experience lag times before invasion, but the mechanisms constraining rapid expansions of introduced are unclear. Solidago altissima is a North American native plant with highly invasive Japanese and Australian that not despite climatic ecological suitability region. By contrasting populations, we tested hypothesis population growth limited by lack long‐distance dispersal via seeds owing to number compatible mates. In field, rarely produced viable seeds....
Abstract While invasive species are a key driver of the global biodiversity crisis, drivers invasiveness remain debated. To investigate genomic basis in plants, we use weed Ambrosia artemisiifolia , introduced to Europe late 19 th century, resequencing 655 ragweed genomes, including 308 herbarium specimens collected up 190 years ago. In European populations, report selection signatures defense genes and lower prevalence particular plant pathogens range. Together with temporal changes...
Trade-offs between performance and tolerance of abiotic biotic stress have been proposed to explain both the success invasive species frequently observed size differences native introduced populations. Canada thistle seeds collected from across North American European range were grown in benign stressful conditions (nutrient stress, shading, simulated herbivory, drought, mowing), evaluate whether individuals differ or tolerance. An additional experiment assessed strength maternal effects by...
ABSTRACT Adaptation is the central feature and leading explanation for evolutionary diversification of life. also notoriously difficult to study in nature, owing its complexity logistically prohibitive timescale. We leverage extensive contemporary historical collections Ambrosia artemisiifolia —an aggressively invasive weed primary cause pollen-induced hayfever—to track phenotypic genetic causes recent local adaptation across native ranges North America Europe, respectively. Large...
Biological invasions are accelerating, and invasive species can have large economic impacts as well severe consequences for biodiversity. During invasions, interact, potentially resulting in hybridization. Here, we examined two Cakile species, C. edentula maritima (Brassicaceae), that co-occur may hybridize during range expansion separate regions of the globe. invaded each location first, while established later, apparently replacing former. We assessed evidence hybridization western North...
Abstract Biological invasions offer a unique opportunity to investigate evolution over contemporary time-scales. Rapid adaptation local climates during range expansion can be major determinant of invasion success, yet fundamental questions remain about its genetic basis. This study sought the basis climate in invasive common ragweed ( Ambrosia artemisiifolia ). Flowering time is key this annual species’ so much that it has evolved repeated latitudinal clines size and phenology across native...
Biological invasions are accelerating, and invasive species can have large economic impacts as well severe consequences for biodiversity. During invasions, interact, potentially resulting in hybridization. Here, we examined two Cakile species, C. edentula maritima (Brassicaceae), that co-occur may hybridize during range expansion separate regions of the globe. invaded each location first, while established later, apparently replacing former. We assessed evidence hybridization western North...
Biological invasions are accelerating, and invasive species can have large economic impacts as well severe negative consequences for biodiversity ecosystems. During invasions, interact, potentially resulting in hybridization. Here, we examined two Cakile species, C. edentula maritima (Brassicaceae), that co-occur may hybridize during range expansion separate regions of the globe. invaded each location first, while established later, apparently replacing former. We assessed evidence...