A5084972200- Plant and animal studies
- Genetic diversity and population structure
- Ecology and Vegetation Dynamics Studies
- Genetic Mapping and Diversity in Plants and Animals
- Genetic and phenotypic traits in livestock
- Plant Parasitism and Resistance
- Environmental DNA in Biodiversity Studies
- Plant Reproductive Biology
- Species Distribution and Climate Change
- Genomics and Phylogenetic Studies
- Plant Diversity and Evolution
- Evolution and Genetic Dynamics
- Plant Molecular Biology Research
- Cancer survivorship and care
- Cardiovascular Health and Risk Factors
- Insect and Pesticide Research
- Chemotherapy-induced cardiotoxicity and mitigation
- Insect and Arachnid Ecology and Behavior
- Forest Insect Ecology and Management
- Cardiac Health and Mental Health
- Chromosomal and Genetic Variations
- Plant Pathogens and Fungal Diseases
- Paleontology and Evolutionary Biology
- Greenhouse Technology and Climate Control
- Bioenergy crop production and management
Edith Cowan University
2019-2025
Macquarie University
2024-2025
Institute of Science and Technology Austria
2012-2024
St. Michael's Hospital
2023
University of Toronto
2008-2023
University of Vienna
2017-2020
Plant Industry
2012
Commonwealth Scientific and Industrial Research Organisation
2012
ACT Government
2012
Google (United States)
2010
Dioecious plant species commonly exhibit deviations from the equilibrium expectation of 1:1 sex ratio, but mechanisms governing this variation are poorly understood. Here, we use comparative analyses 243 species, representing 123 genera and 61 families to investigate ecological genetic correlates in operational (flowering) ratio. After controlling for phylogenetic nonindependence, examined influence growth form, clonality, fleshy fruits, pollen seed dispersal vector, possession chromosomes...
In many angiosperm species, populations are reproductively subdivided into distinct sexual morphs including females, males and hermaphrodites. Sexual polymorphism is maintained by frequency-dependent selection, leading to predictable sex ratios at equilibrium. Charles Darwin devoted much of his book ‘ The Different Forms Flowers on Plants the Same Species ’ (1877) investigating plant polymorphisms laid foundation for problems addressed today integrating theory with empirical studies...
Understanding the relative importance of heterosis and outbreeding depression over multiple generations is a key question in evolutionary biology essential for identifying appropriate genetic sources population ecosystem restoration. Here we use 2455 experimental crosses between 12 pairs rare perennial plant Rutidosis leptorrhynchoides (Asteraceae) to investigate multi-generational (F(1), F(2), F(3)) fitness outcomes inter-population hybridization. We detected no evidence depression, with...
Significance Populations often show “islands of divergence” in the genome. Analysis divergence between subspecies Antirrhinum that differ flower color patterns shows sharp peaks relative occur at two causal loci. The island is shaped by a combination gene flow and multiple selective sweeps, showing how barriers populations can arise be maintained.
Plant mating systems play a key role in structuring genetic variation both within and between species. In hybrid zones, the outcomes dynamics of hybridization are usually interpreted as balance gene flow selection against hybrids. Yet, can introduce selective forces that alter these expectations; with diverse for level direction depending on outcrossing whether species pair same or divergent. We present survey 133 pairs from 41 plant families examine how patterns vary system. if zone mode,...
Abstract Speciation, the continuous process by which new species form, is often investigated looking at variation of nucleotide diversity and differentiation across genome (hereafter genomic landscapes). A key challenge lies in how to determine main evolutionary forces play shaping these patterns. One promising strategy, albeit little used date, comparatively investigate landscapes as progression through time using a series pairs along divergence gradient. Here, we resequenced 201...
Populations of dioecious flowering plants commonly exhibit heterogeneity in sex ratios and deviations from the equilibrium expectation equal numbers females males. Yet role ecological demographic factors contributing towards biased is currently not well understood.
Small RNAs (sRNAs) regulate genes in plants and animals. Here, we show that population-wide differences color patterns snapdragon flowers are caused by an inverted duplication generates sRNAs. The complexity size of the transcripts indicate represents intermediate on pathway to microRNA evolution. sRNAs repress a pigment biosynthesis gene, creating yellow highlight at site pollinator entry. exhibits steep clines allele frequency natural hybrid zone, showing is under selection. Thus,...
Abstract Globally, the diversity of arthropods and plants upon which they rely are under increasing pressure due to a combination biotic abiotic anthropogenic stressors. Unfortunately, conventional survey methods used monitor ecosystems often challenging conduct on large scales. Pan traps commonly pollinator method environmental DNA (eDNA) metabarcoding pan trap water may offer high‐throughput alternative aid in detection both plant resources on. Here, we examined if eDNA can be identify...
Species can be considered to occupy different peaks in a fitness landscape, visualised as an undulating surface, with height corresponding and horizontal coordinates genotype. A key evolutionary problem is understand how populations traverse valleys reach peaks. Hypothetical solutions include shifting balance theory, peak movements due environmental changes, or connectivity high-dimensional spaces. However, testing hypotheses not straightforward because identifying loci epistatic...
Identification of the genomic regions that contribute to reproductive isolation and how they interact is a major goal evolutionary genetics. Much effort has focused on locating candidate genes potential barrier loci by scanning genomes for excess differentiation (FST). An alternative, perhaps more robust approach, would be scan exhibiting steep clines in allele frequency across hybrid zone. Here we develop this approach apply it data from zone between varieties Antirrhinum majus subspecies...
1 Habitat fragmentation can alter the relative frequency of cross-compatible species within an area, which affect levels interspecific hybrid production and reduce viability small populations through genetic demographic swamping. For 18 Eucalyptus aggregata, we examined effects absolute population size (compared with its congeners E. rubida, viminalis dalrympleana) on production, diversity subsequent seed seedling performance. 2 Relative was strongly negatively correlated rates suggesting...
The frequency of hybridization in plants is context dependent and can be influenced by the local mating environment. We used progeny arrays admixture pollen dispersal analyses to assess relative importance pre-mating reproductive barriers demographic environment as explanations variation hybrid three mapped zones Eucalyptus aggregata E. rubida. A total 731 open-pollinated from 36 maternal parents were genotyped using six microsatellite markers. Admixture analysis identified substantial among...
Abstract Ringbauer et al. introduce a novel method to estimate barriers gene flow in two-dimensional population. Their inference scheme utilizes geographically... In continuous populations with local migration, nearby pairs of individuals have on average more similar genotypes than geographically well-separated pairs. A barrier distorts this classical pattern isolation by distance. Genetic similarity is decreased for sample different sides the and increased same side near barrier. Here, we...
Purpose: In this study, we examined the effects of a 30-week community-based exercise program on cancer-related fatigue, quality life, and other health-related outcomes in sample adults with mixed cancer diagnoses. Methods: This prospective cohort study looked at for participants involved Wellspring Cancer Exercise Program southern Ontario. The consisted an initial phase two supervised sessions weekly 10 weeks transition one session subsequent 20 weeks. Outcomes were measured baseline every...
Sexual dimorphism in resource allocation is expected to change during the life cycle of dioecious plants because temporal differences between sexes reproductive investment. Given potential for sex-specific costs, availability may contribute variation females and males. Here, we used Rumex hastatulus, a dioecious, wind-pollinated annual plant, investigate whether sexual varies with life-history stage nutrient availability, determine patterns differ depending on commitment. To examine if costs...