W. Powell

ORCID: 0000-0002-5612-3398
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About
Contact & Profiles
Research Areas
  • Wheat and Barley Genetics and Pathology
  • Genetic Mapping and Diversity in Plants and Animals
  • Genetics and Plant Breeding
  • Genetic diversity and population structure
  • Plant Disease Resistance and Genetics
  • Plant tissue culture and regeneration
  • Plant Pathogens and Resistance
  • Chromosomal and Genetic Variations
  • Genomics and Phylogenetic Studies
  • Plant Virus Research Studies
  • Genetic and Environmental Crop Studies
  • Plant Genetic and Mutation Studies
  • Yeasts and Rust Fungi Studies
  • Plant pathogens and resistance mechanisms
  • Potato Plant Research
  • Plant and animal studies
  • Plant Pathogens and Fungal Diseases
  • Genetic and phenotypic traits in livestock
  • Insect-Plant Interactions and Control
  • Agricultural pest management studies
  • Seed and Plant Biochemistry
  • Plant Reproductive Biology
  • Coconut Research and Applications
  • Soybean genetics and cultivation
  • Peanut Plant Research Studies

Scotland's Rural College
2016-2025

King's College Hospital
2019-2025

University of Edinburgh
2023

Martin Luther University Halle-Wittenberg
2023

Luther University
2023

Agriculture and Food
2023

Aberystwyth University
1980-2020

Institute of Biological, Environmental and Rural Sciences
2011-2020

University of the West of England
2015-2020

Agropolis International
2015-2019

10.1016/1360-1385(96)86898-1 article EN Trends in Plant Science 1996-07-01

10.1016/s1360-1385(96)86898-0 article EN Trends in Plant Science 1996-07-01

Abstract A total of 568 new simple sequence repeat (SSR)-based markers for barley have been developed from a combination database sequences and small insert genomic libraries enriched range short repeats. Analysis the SSRs on 16 cultivars revealed variable levels informativeness but no obvious correlation was found with SSR length, motif type, or map position. Of developed, 242 were genetically mapped, 216 37 previously published in single doubled-haploid population derived F1 an...

10.1093/genetics/156.4.1997 article EN public-domain Genetics 2000-12-01

Simple sequence repeats (SSRs), consisting of tandemly repeated multiple copies mono-, di-, tri-, or tetranucleotide motifs, are ubiquitous in eukaryotic genomes and frequently used as genetic markers, taking advantage their length polymorphism. We have examined the polymorphism such sequences chloroplast plants, by using a PCR-based assay. GenBank searches identified presence several (dA)n.(dT)n mononucleotide stretches genomes. A (cp) SSR was three pine species (Pinus contorta, Pinus...

10.1073/pnas.92.17.7759 article EN Proceedings of the National Academy of Sciences 1995-08-15

Habitat destruction and the resultant fragmentation of remaining forest are a common phenomenon in tropics. Most investigations emphasize potential dangers isolating patches exposing populations to loss species diversity through founder effects, genetic drift, inbreeding, restricted gene flow. However, limited number studies have shown that flow may be extensive tropical trees, suggesting it occur between fragments also “isolated” remnant trees. There is an urgent need quantify pollen within...

10.1073/pnas.042649999 article EN Proceedings of the National Academy of Sciences 2002-02-12

Abstract In human genetics a detailed knowledge of linkage disequilibrium (LD) is considered prerequisite for effective population-based, high-resolution gene mapping and cloning. Similar opportunities exist plants; however, differences in breeding system population history need to be considered. Here we report study localized LD different populations an inbreeding crop species. We measured between within four loci the region surrounding hardness locus three pools barley (Hordeum vulgare)....

10.1534/genetics.104.038489 article EN Genetics 2005-10-12

Abstract We used chloroplast simple sequence repeats (cpSSRs) to examine whether there is any variation present in the genome of Pinus torreyana (Parry ex Carrière) that may previously not have been detected using RFLPs. Analysis 17 cpSSR loci showed no variation, which consistent with previous cpRFLP work and confirms species descended from an original, highly monomorphic population following a bottleneck. This lack biological P. allowed us estimate mutation rates at as between 3.2 × 10-5...

10.1093/genetics/153.2.943 article EN Genetics 1999-10-01

The development of new barleys tolerant abiotic and biotic stresses is an essential part the continued improvement crop. domestication barley, as in many crops, resulted a marked truncation genetical variation present wild populations. This process significant to agronomists scientists because lack allelic will prevent adapted cultivars hinder investigation genetic mechanisms underlying performance. Wild barley would be useful source for stress tolerance if surveys identify appropriate...

10.1093/jexbot/51.342.9 article EN Journal of Experimental Botany 2000-01-01
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