A5016694959- Genetic Mapping and Diversity in Plants and Animals
- Genetic diversity and population structure
- Chromosomal and Genetic Variations
- Plant Disease Resistance and Genetics
- Genomics and Phylogenetic Studies
- Genetic and phenotypic traits in livestock
- Lipid metabolism and biosynthesis
- Plant and animal studies
- Plant Parasitism and Resistance
- Ecology and Vegetation Dynamics Studies
- Plant and Fungal Species Descriptions
- Genetics and Plant Breeding
- Plant Gene Expression Analysis
- Plant Pathogenic Bacteria Studies
- Plant Virus Research Studies
- Plant Diversity and Evolution
- Plant Molecular Biology Research
- Botanical Studies and Applications
- Advanced Proteomics Techniques and Applications
- Linguistics and Cultural Studies
- Photosynthetic Processes and Mechanisms
- CRISPR and Genetic Engineering
- Plant-Microbe Interactions and Immunity
- Infant Nutrition and Health
- Media, Gender, and Advertising
University of Nebraska–Lincoln
2012-2022
University of California, Davis
2017-2022
University of Colorado Boulder
2016
Iowa State University
2009-2012
While often deleterious, hybridization can also be a key source of genetic variation and pre-adapted haplotypes, enabling rapid evolution niche expansion. Here we evaluate these opposing selection forces on introgressed ancestry between maize ( Zea mays ssp. ) its wild teosinte relative, mexicana ). Introgression from ecologically diverse may have facilitated maize’s global range expansion, in particular to challenging high elevation regions (> 1500 m). We generated low-coverage genome...
Summary Losses of floral pigmentation represent one the most common evolutionary transitions in flower color, yet genetic basis for these changes has been elucidated only a handful cases. Here we used crossing studies, bulk‐segregant RNA sequencing, phylogenetic analyses and functional tests to identify gene(s) responsible transition white flowers Iochroma loxense . Crosses between I. its blue‐flowered sister species, cyaneum , suggested that single locus controls color difference allele...
Chromosomal inversions play an important role in local adaptation. Inversions can capture multiple locally adaptive functional variants a linked block by repressing recombination. However, this recombination suppression makes it difficult to identify the genetic mechanisms underlying inversion’s In study, we used large-scale transcriptomic data dissect importance of 13 Mb inversion locus ( Inv4m ) found almost exclusively highland populations maize Zea mays ssp. ). was introgressed into from...
Native Americans domesticated maize ( Zea mays ssp. ) from lowland teosinte parviglumis parviglumis) in the warm Mexican southwest and brought it to highlands of Mexico South America where was exposed lower temperatures that imposed strong selection on flowering time. Phospholipids are important metabolites plant responses low-temperature phosphorus availability have been suggested influence Here, we combined linkage mapping with genome scans identify High PhosphatidylCholine 1 HPC1 ), a...
Abstract Threats to crop production due climate change are one of the greatest challenges facing plant breeders today. While considerable adaptive variation exists in traditional landraces, natural populations wild relatives, and ex situ germplasm collections, separating alleles from linked deleterious variants that impact agronomic traits is challenging has limited utility these diverse resources. Modern genome editing techniques such as CRISPR offer a potential solution by targeting...
Thousands of species will be sequenced in the next few years; however, understanding how their genomes work, without an unlimited budget, requires both molecular and novel evolutionary approaches. We developed a sensitive sequence alignment pipeline to identify conserved noncoding sequences (CNSs) Andropogoneae tribe (multiple crop descended from common ancestor ∼18 million years ago). The share similar physiology while being tremendously genomically diverse, harboring broad range ploidy...
Abstract Premise Isoëtes is a genus of small, semi‐woody, hydrophilic, heterosporous lycophytes with cosmopolitan, global distribution. However, local populations tend to be found in narrow, patchy, and highly fragmented mesic aquatic habitats, many which are currently under threat. In this study, we sought uncover how patchy distribution has affected the evolutionary history one two lineages on West Coast North America—the Pacific Laurasian clade (PLC). Methods We used combination...
Background Human milk contains a complex mixture of triacylglycerols (TAG), making it challenging to recreate using common ingredients. Objective The study aimed develop an innovative fermentation technique produce essential human TAG, effectively tackling significant hurdle in infant nutrition. Method An in-depth analysis the literature has been conducted identify specific TAG be targeted. We used microalgal oil production platform and two-step procedure modify its fatty acid composition....
• Premise of the study: Plants and animals may experience reproductive Allee effects in fragmented populations, obligate pollination mutualisms be especially sensitive to extinction risk via this density‐dependent process. In study we examine how a shift from within‐crown synchrony asynchrony influences assurance through contributions selfing outcrossing small, spatially isolated populations Ficus . Methods: The research focuses on monoecious fig F. petiolaris consists phenological analyses...
Abstract While often deleterious, hybridization can also be a key source of genetic variation and pre-adapted haplotypes, enabling rapid evolution niche expansion. Here we evaluate these opposing selection forces on introgressed ancestry between maize ( Zea mays ssp. ) its wild teosinte relative, mexicana ). Introgression from ecologically diverse may have facilitated maize’s global range expansion, in particular to challenging high elevation regions > 1500 m). We generated low-coverage...
Abstract Native Americans domesticated maize ( Zea mays ssp. ) from lowland teosinte parviglumis in the warm Mexican southwest and brought it to highlands of México South America where was exposed lower temperatures that imposed strong selection on flowering time. Phospholipids are important metabolites plant responses low-temperature phosphorus availability, have been suggested influence Here, we combined linkage mapping with genome scans identify High PhosphatidylCholine 1 HPC1 ), a gene...
Maintaining crop yields in the face of climate change is a major challenge facing plant breeding today. Considerable genetic variation exists ex-situ collections traditional varieties, but identifying adaptive loci and testing their agronomic performance large populations field trials costly. Here, we study utility genomic data for promising varieties to incorporate into maize programs. To do so, use phenotypic from more than 4,000 grown 13 trial environments. First, used genotype predict...
Abstract The tomato ( Solanum lycopersicum L.) family, Solanaceae, is a model clade for wide range of applied and basic research questions. Currently, reference‐quality genomes are available over 30 species from seven genera, these include numerous crops as well wild [e.g., Jaltomata sinuosa (Miers) Mione Nicotiana attenuata Torr. ex S. Watson]. Here we present the genome showy‐flowered Andean shrub Iochroma cyaneum (Lindl.) M. L. Green, woody lineage tomatillo Physalis philadelphica Lam.)...
Abstract DNA sequencing technology has advanced so quickly, identifying key functional regions using evolutionary approaches is required to understand how those genomes work. This research develops a sensitive sequence alignment approach identify constrained non-coding sequences in the Andropogoneae tribe. The grass tribe contains several crop species descended from common ancestor ~18 million years ago. Despite broadly similar phenotypes, they have tremendous genomic diversity with broad...
Here we have proposed the functional space hypothesis , positing that mutational target size scales with genome size, impacting number, source, and genomic location of beneficial mutations contribute to adaptation. Though motivated by preliminary evidence, mostly from Arabidopsis maize, more data are needed before any rigorous assessment can be made. If correct, suggests should expect plants large genomes exhibit outside genes, regulatory variation, likely less signal strong selective sweeps...
Abstract Chromosomal inversions play an important role in local adaptation. Inversions can capture multiple locally adaptive functional variants a linked block by repressing recombination. However, this recombination suppression makes it difficult to identify the genetic mechanisms that underlie inversion’s adaption. In study, we explore how large-scale transcriptomic data be used dissect importance of 13 Mb inversion locus ( Inv4m ) found almost exclusively highland populations maize Zea...
This paper tests multiple methods for detecting and localizing hybrids in the genus Iochroma (Solanaceae). We created a series of datasets varying amount expected hybridization, we included both natural 'positive control' (an artificial hybrid). found that adding to dataset markedly increased discordance decreased tree certainty, as predicted. Nevertheless, our analyses largely failed correctly identify hybrid taxa their parental lineages, even positive control. suggest several paths forward...