A5010479557- Genetic diversity and population structure
- Genetic Mapping and Diversity in Plants and Animals
- Sunflower and Safflower Cultivation
- Rice Cultivation and Yield Improvement
- Genetic and phenotypic traits in livestock
- Genetic and Environmental Crop Studies
- Plant Molecular Biology Research
- Evolution and Genetic Dynamics
- Plant Reproductive Biology
- Genetics, Bioinformatics, and Biomedical Research
- Plant Virus Research Studies
- Genetics and Plant Breeding
- GABA and Rice Research
- Light effects on plants
- Plant and animal studies
- CRISPR and Genetic Engineering
- Photosynthetic Processes and Mechanisms
- Environmental DNA in Biodiversity Studies
- Plant Parasitism and Resistance
- Bioenergy crop production and management
- Evolution and Paleontology Studies
- Research Data Management Practices
- Plant pathogens and resistance mechanisms
- Evolutionary Game Theory and Cooperation
- Ecology and Vegetation Dynamics Studies
University of Massachusetts Boston
2020-2022
Colorado State University
2016-2022
University of British Columbia
2010-2017
Brown University
2009-2013
Kansas State University
2009
Max Planck Institute for Plant Breeding Research
2009
Like many species, the model plant Arabidopsis thaliana exhibits multiple different life histories in natural environments. We grew mutants impaired signaling pathways field experiments across species' native European range order to dissect mechanisms underlying this variation. Unexpectedly, mutational loss at loci implicated cold requirement for flowering had little effect on history except late-summer cohorts. A genetically informed photothermal of progression toward explained most...
Abstract Reproducibility is the benchmark for results and conclusions drawn from scientific studies, but systematic studies on reproducibility of are surprisingly rare. Moreover, many modern statistical methods make use ‘random walk’ model fitting procedures, these inherently stochastic in their output. Does combination procedures current standards data archiving method reporting permit reproduction authors' results? To test this, we reanalysed sets gathered papers using software package...
The data underlying scientific papers should be accessible to researchers both now and in the future, but how best can we ensure that these are available? Here examine effectiveness of four approaches archiving: no stated archiving policy, recommending (but not requiring) archiving, two versions mandating deposition at acceptance. We control for differences between types by trying obtain from use a single, widespread population genetic analysis, structure. At one extreme, found mandated...
Abstract Selection on quantitative trait loci ( QTL ) may vary among natural environments due to differences in the genetic architecture of traits, environment‐specific allelic effects or changes direction and magnitude selection specific traits. To dissect environmental life history across climatic regions, we grew a panel interconnected recombinant inbred lines RIL s) Arabidopsis thaliana four field sites its native European range. For each environment, mapped for growth, reproductive...
Abstract To ensure food security in the face of population growth, decreasing water and land for agriculture, increasing climate variability, crop yields must increase faster than current rates. Increased will require implementing novel approaches genetic discovery breeding. Here we demonstrate potential field-based high throughput phenotyping (HTP) on a large recombinant rice to identify variation underlying important traits. We find that detecting quantitative trait loci (QTL) with HTP is...
Significance Local adaptation can occur due to individual genetic variants that increase the fitness of individuals in their home environments but decrease other [genetic trade-offs (GTs)] or one environment have no effect [conditional neutrality (CN)]. Here, we show GT quantitative trait loci (QTLs) for between Italian and Swedish Arabidopsis thaliana exhibit strong population genomic signatures local adaptation, including elevated levels allele frequency differentiation, correlations...
Populations that have independently evolved reproductive isolation from their ancestors while remaining reproductively cohesive undergone parallel speciation. A specific type of speciation, known as ecological is one several forms evidence for ecology's role in In this paper we search the literature candidate examples speciation plants. We use four explicit criteria (independence, isolation, compatibility, and selection) to judge strength each potential case. find plants unexpectedly scarce,...
Few studies have investigated the causes of evolutionary rate variation among plant nuclear genes, especially in recently diverged species still capable hybridizing wild. The recent advent Next Generation Sequencing (NGS) permits investigation genome wide rates protein evolution and role selection generating maintaining divergence. Here, we use individual whole-transcriptome sequencing (RNAseq) to refine our understanding population genomics wild sunflowers (Helianthus spp.) factors that...
Premise of research. The transition from herbaceous annual to woody perennial has occurred numerous times during angiosperm evolution, but the suite genetic changes that accompanies this life history shift remains poorly understood. Here we analyze sequence and gene expression divergence between Helianthus annuus a recently diverged ecotype California.Methodology. We grew plants populations typical H. in common garden measured days flower, mature height, basal stem density. looked for...
Background and Aims The patterning of floral ultraviolet (UV) pigmentation varies both intra- interspecifically in sunflowers many other plant species, impacts pollinator attraction, can be critical to reproductive success crop yields. However, the genetic basis for variation UV is largely unknown. This study examines architecture proportional absolute size bullseye Helianthus argophyllus, a close relative domesticated sunflower. Methods A camera modified capture light (320–380 nm) was used...
Substantial intraspecific variation in life history is rare and potentially a signal of incipient ecological speciation, if driven by geographically heterogenous natural selection. We present the first report extensive polymorphism Helianthus argophyllus, silverleaf sunflower, examine evidence for its evolution divergent In 18 populations sampled from across species range grown common garden, most quantitative traits covaried such that individuals could be assigned to two distinct syndromes:...
Recent advances in nucleic acid sequencing technologies have led to a dramatic increase the number of markers available generate genetic linkage maps. This increased marker density can be used improve genome assemblies as well add much needed resolution for loci controlling variation ecologically and agriculturally important traits. However, traditional map construction methods from these large datasets computationally prohibitive highly error prone. We present TSPmap, method which...
When studying selection during adaptation to novel environments, researchers have often paid little attention an organism’s earliest developmental stages. Despite this lack of attention, early life history traits may be under strong colonization, as the expression adaptive phenotypes at later points is contingent upon survival. Moreover, timing transitions can constrain transitions, with potentially large effects on fitness. In issue, Huang et al. (2010) underscore importance in Arabidopsis...
Abstract Grain size and shape are important yield components in rice ( Oryza sativa L.), their genetic control under adverse environmental conditions, such as drought stress, remains uncertain. This lack of knowledge is due to the laborious, time‐consuming phenotyping seed attributes large populations. We developed a new high‐throughput method based on desktop scanner open‐source package Plant Computer Vision (PlantCV). used this investigate variability within Global multi‐parent advanced...