Peter L. Morrell
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View article: Whole-genome resequencing of the wild barley diversity collection: a resource for identifying and exploiting genetic variation for cultivated barley improvement
Whole-genome resequencing of the wild barley diversity collection: a resource for identifying and exploiting genetic variation for cultivated barley improvement Open
To exploit allelic variation in Hordeum vulgare subsp. spontaneum, the Wild Barley Diversity Collection was subjected to paired-end Illumina sequencing at ∼9 × depth and evaluated for several agronomic traits. We discovered 240.2 million s…
View article: Sodium azide mutagenesis induces a unique pattern of mutations
Sodium azide mutagenesis induces a unique pattern of mutations Open
The nature and effect of mutations are of fundamental importance to the evolutionary process. The generation of mutations with mutagens has also played important roles in genetics. Applications of mutagens include dissecting the genetic ba…
View article: Environmental genomic selection to leverage polygenic local adaptation in barley landraces
Environmental genomic selection to leverage polygenic local adaptation in barley landraces Open
Climate change is threatening agricultural production across the globe. Germplasm collections provide an opportunity to explore where variation exists with important crop species. Genome environment association (GEA) is a standard approach…
View article: Identification of genetic variation associated with high-temperature tolerance in cowpea
Identification of genetic variation associated with high-temperature tolerance in cowpea Open
Heat tolerance is an important trait in cowpea, a crop that constitutes the primary protein source for a large portion of the human population in sub-Saharan Africa. Cowpea grows across this region, with cultivated, landrace, semi-wild, an…
View article: Whole-Genome Sequencing of the Wild Barley Diversity Collection: A Resource for Identifying and Exploiting Genetic Variation for Cultivated Barley Improvement
Whole-Genome Sequencing of the Wild Barley Diversity Collection: A Resource for Identifying and Exploiting Genetic Variation for Cultivated Barley Improvement Open
To exploit allelic variation in Hordeum vulgare subsp. spontaneum , the Wild Barley Diversity Collection was evaluated for several agronomic traits and subjected to paired-end Illumina sequencing at ∼9X depth, generating 109.5 million sing…
View article: Back to the Future: Environmental genomic selection to take advantage of polygenic local adaptation
Back to the Future: Environmental genomic selection to take advantage of polygenic local adaptation Open
The genetic basis of adaptation is a fundamental question in evolutionary genetics. Environmental association analysis (EAA) and various allele frequency comparisons in genomic environmental association (GEA) have become standard approache…
View article: Phenotypically wild barley shows evidence of introgression from cultivated barley
Phenotypically wild barley shows evidence of introgression from cultivated barley Open
Plant conservation hinges on preserving biodiversity, which is crucial for long-term adaptation. Multiple studies have reported genetic evidence of crop-to-wild introgression in phenotypically wild accessions of wild barley ( Hordeum vulga…
View article: Sodium azide mutagenesis induces a unique pattern of mutations
Sodium azide mutagenesis induces a unique pattern of mutations Open
The nature and effect of mutations are of fundamental importance to the evolutionary process. The generation of mutations with mutagens has also played important roles in genetics. Applications of mutagens include dissecting the genetic ba…
View article: Adaptive gene loss in the common bean pan-genome during range expansion and domestication
Adaptive gene loss in the common bean pan-genome during range expansion and domestication Open
The common bean ( Phaseolus vulgaris L.) is a crucial grain legume crop [1,2] whose life history offers an ideal evolutionary model to identify and study adaptive variants in wild and domestication populations [3]. Here we present the firs…
View article: Natural selection drives emergent genetic homogeneity in a century-scale experiment with barley
Natural selection drives emergent genetic homogeneity in a century-scale experiment with barley Open
Direct observation is central to our understanding of the process of adaptation, but evolution is rarely documented in a large, multicellular organism for more than a few generations. Here, we observe genetic and phenotypic evolution acros…
View article: UDP-glucosyltransferase HvUGT13248 confers type II resistance to <i>Fusarium graminearum</i> in barley
UDP-glucosyltransferase HvUGT13248 confers type II resistance to <i>Fusarium graminearum</i> in barley Open
Fusarium head blight (FHB) of barley (Hordeum vulgare) causes yield losses and accumulation of trichothecene mycotoxins (e.g. deoxynivalenol [DON]) in grains. Glucosylation of DON to the nontoxic DON-3-O-glucoside (D3G) is catalyzed by UDP…
View article: Diamonds in the not-so-rough: Wild relative diversity hidden in crop genomes
Diamonds in the not-so-rough: Wild relative diversity hidden in crop genomes Open
Crop production is becoming an increasing challenge as the global population grows and the climate changes. Modern cultivated crop species are selected for productivity under optimal growth environments and have often lost genetic variants…
View article: Genomic conservation of crop wild relatives: A case study of citrus
Genomic conservation of crop wild relatives: A case study of citrus Open
Conservation of crop wild relatives is critical for plant breeding and food security. The lack of clarity on the genetic factors that lead to endangered status or extinction create difficulties when attempting to develop concrete recommend…
View article: Diamonds in the Not-So-Rough: Wild Relative Diversity Hidden in Crop Genomes
Diamonds in the Not-So-Rough: Wild Relative Diversity Hidden in Crop Genomes Open
Cultivated species have reduced genetic diversity relative to their closest wild relatives. Domestication also changes the type and effect of polymorphic variants in domesticates. Cultivated species selected for productivity under optimal …
View article: Unloading potatoes: Potato breeding moves forward with only half the genome
Unloading potatoes: Potato breeding moves forward with only half the genome Open
Potato is one of the most important food crops in the world and, in contrast to other staples, has not seen large improvements in yield. Agha, Shannon, and Morrell preview an article recently published in Cell, "Phylogenomic discovery of d…
View article: A view of the pan‐genome of domesticated Cowpea ( <i>Vigna unguiculata</i> [L.] Walp.)
A view of the pan‐genome of domesticated Cowpea ( <i>Vigna unguiculata</i> [L.] Walp.) Open
Cowpea, Vigna unguiculata L . Walp., is a diploid warm‐season legume of critical importance as both food and fodder in sub‐Saharan Africa. This species is also grown in Northern Africa, Europe, Latin America, North America, and East to Sou…
View article: Selection and adaptive introgression guided the complex evolutionary history of the European common bean
Selection and adaptive introgression guided the complex evolutionary history of the European common bean Open
Domesticated crops have been disseminated by humans over vast geographic areas. After 1492, the common bean ( Phaseolus vulgaris L.) was introduced in Europe. Here, we combine whole-genome profiling, metabolic fingerprinting and phenotypic…
View article: A view of the pan-genome of domesticated cowpea (<i>Vigna unguiculata</i>[L.] Walp.)
A view of the pan-genome of domesticated cowpea (<i>Vigna unguiculata</i>[L.] Walp.) Open
Cowpea, Vigna unguiculata L . Walp., is a diploid warm-season legume of critical importance as both food and fodder in sub-Saharan Africa. This species is also grown in Northern Africa, Europe, Latin America, North America, and East to Sou…
View article: The evolutionary patterns of barley pericentromeric chromosome regions, as shaped by linkage disequilibrium and domestication
The evolutionary patterns of barley pericentromeric chromosome regions, as shaped by linkage disequilibrium and domestication Open
SUMMARY The distribution of recombination events along large cereal chromosomes is uneven and is generally restricted to gene‐rich telomeric ends. To understand how the lack of recombination affects diversity in the large pericentromeric r…
View article: The evolutionary patterns of barley pericentromeric chromosome regions, as shaped by linkage disequilibrium and domestication
The evolutionary patterns of barley pericentromeric chromosome regions, as shaped by linkage disequilibrium and domestication Open
The distribution of recombination events along large cereal chromosomes is uneven and generally restricted to gene-rich telomeric ends. In order to understand how the lack of recombination affects diversity in the large pericentromeric reg…
View article: The evolutionary patterns of barley pericentromeric chromosome regions, as shaped by linkage disequilibrium and domestication
The evolutionary patterns of barley pericentromeric chromosome regions, as shaped by linkage disequilibrium and domestication Open
The distribution of recombination events along large cereal chromosomes is uneven and generally restricted to gene-rich telomeric ends. In order to understand how the lack of recombination affects diversity in the large pericentromeric reg…
View article: Fast neutron mutagenesis in soybean enriches for small indels and creates frameshift mutations
Fast neutron mutagenesis in soybean enriches for small indels and creates frameshift mutations Open
The mutagenic effects of ionizing radiation have been used for decades to create novel variants in experimental populations. Fast neutron (FN) bombardment as a mutagen has been especially widespread in plants, with extensive reports descri…
View article: Fast neutron mutagenesis in soybean creates frameshift mutations
Fast neutron mutagenesis in soybean creates frameshift mutations Open
The mutagenic effects of ionizing radiation have been used for decades to create novel variants in experimental populations. Fast neutron (FN) bombardment as a mutagen has been especially widespread in plants, with extensive reports descri…
View article: Plant Genome Editing and the Relevance of Off-Target Changes
Plant Genome Editing and the Relevance of Off-Target Changes Open
Site-directed nucleases (SDNs) used for targeted genome editing are powerful new tools to introduce precise genetic changes into plants. Like traditional approaches, such as conventional crossing and induced mutagenesis, genome editing aim…
View article: The Fate of Deleterious Variants in a Barley Genomic Prediction Population
The Fate of Deleterious Variants in a Barley Genomic Prediction Population Open
Targeted identification and purging of deleterious genetic variants has been proposed as a novel approach to animal and plant breeding. This strategy is motivated, in part, by the observation that demographic events and strong selection as…