World's Best Scientists 2026 revealed!
William T. B. Thomas

William T. B. Thomas

D-Index & Metrics

Plant Science and Agronomy

D-Index
53
Citations
9964
World Ranking
1806
National Ranking
154

William T. B. Thomas publication distribution in Plant Science and Agronomy in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Plant Science and Agronomy in 2026. The highlighted bar marks where William T. B. Thomas sits on this spectrum.

36–40 publications: 2 scientists 41–45 publications: 7 scientists 46–50 publications: 40 scientists 51–55 publications: 58 scientists 56–60 publications: 60 scientists 61–65 publications: 107 scientists 66–70 publications: 130 scientists 71–75 publications: 153 scientists 76–80 publications: 191 scientists 81–85 publications: 199 scientists 86–90 publications: 206 scientists 91–95 publications: 218 scientists 96–100 publications: 226 scientists 101–105 publications: 227 scientists 106–110 publications: 247 scientists 111–115 publications: 255 scientists 116–120 publications: 253 scientists 121–125 publications: 233 scientists 126–130 publications: 219 scientists 131–135 publications: 201 scientists 136–140 publications: 194 scientists 141–145 publications: 176 scientists 146–150 publications: 157 scientists 151–155 publications: 147 scientists 156–160 publications: 151 scientists 161–165 publications: 159 scientists 166–170 publications: 137 scientists 171–175 publications: 128 scientists 176–180 publications: 126 scientists 181–185 publications: 98 scientists 186–190 publications: 114 scientists 191–195 publications: 100 scientists 196–200 publications: 90 scientists 201–205 publications: 71 scientists 206–210 publications: 98 scientists 211–215 publications: 70 scientists 216–220 publications: 86 scientists 221–225 publications: 61 scientists 226–230 publications: 58 scientists 231–235 publications: 53 scientists 236–240 publications: 64 scientists 241–245 publications: 39 scientists 246–250 publications: 46 scientists 251–255 publications: 51 scientists 256–260 publications: 36 scientists 261–265 publications: 44 scientists 266–270 publications: 35 scientists 271–275 publications: 30 scientists 276–280 publications: 33 scientists 281–285 publications: 35 scientists 286–290 publications: 36 scientists 291–295 publications: 26 scientists 296–300 publications: 26 scientists 301–305 publications: 31 scientists 306–310 publications: 30 scientists 311–315 publications: 21 scientists 316–320 publications: 29 scientists 321–325 publications: 14 scientists 326–330 publications: 15 scientists 331–335 publications: 15 scientists 336–340 publications: 17 scientists 341–345 publications: 15 scientists 346–350 publications: 12 scientists 351–355 publications: 17 scientists 356–360 publications: 18 scientists 361–365 publications: 12 scientists 366–370 publications: 11 scientists 371–375 publications: 6 scientists 376–380 publications: 6 scientists 381–385 publications: 11 scientists 386–390 publications: 9 scientists 391–395 publications: 10 scientists 396–400 publications: 8 scientists 401–405 publications: 4 scientists 406–410 publications: 9 scientists 411–415 publications: 11 scientists 416–420 publications: 4 scientists 421–425 publications: 7 scientists 426–430 publications: 4 scientists 431–435 publications: 3 scientists 436–440 publications: 5 scientists 441–445 publications: 8 scientists 446–450 publications: 6 scientists 451–455 publications: 7 scientists 456–460 publications: 5 scientists 461–465 publications: 6 scientists 466 publications: 2 scientists 467+ publications: 99 scientists
36 publications 467+

This scientist: 143 publications — 54th percentile

54% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 467 publications or more.

William T. B. Thomas D-index placement in Plant Science and Agronomy in 2026

The chart shows the D-index (discipline H-index) distribution of Plant Science and Agronomy scientists ranked by Research.com in 2026. The highlighted bar marks where William T. B. Thomas sits on this spectrum.

30 D-Index: 200 scientists 31 D-Index: 236 scientists 32 D-Index: 253 scientists 33 D-Index: 283 scientists 34 D-Index: 288 scientists 35 D-Index: 240 scientists 36 D-Index: 246 scientists 37 D-Index: 243 scientists 38 D-Index: 247 scientists 39 D-Index: 229 scientists 40 D-Index: 232 scientists 41 D-Index: 230 scientists 42 D-Index: 228 scientists 43 D-Index: 219 scientists 44 D-Index: 193 scientists 45 D-Index: 164 scientists 46 D-Index: 158 scientists 47 D-Index: 143 scientists 48 D-Index: 131 scientists 49 D-Index: 127 scientists 50 D-Index: 122 scientists 51 D-Index: 122 scientists 52 D-Index: 110 scientists 53 D-Index: 102 scientists 54 D-Index: 98 scientists 55 D-Index: 79 scientists 56 D-Index: 85 scientists 57 D-Index: 88 scientists 58 D-Index: 91 scientists 59 D-Index: 62 scientists 60 D-Index: 61 scientists 61 D-Index: 59 scientists 62 D-Index: 54 scientists 63 D-Index: 61 scientists 64 D-Index: 59 scientists 65 D-Index: 58 scientists 66 D-Index: 41 scientists 67 D-Index: 49 scientists 68 D-Index: 39 scientists 69 D-Index: 32 scientists 70 D-Index: 40 scientists 71 D-Index: 47 scientists 72 D-Index: 38 scientists 73 D-Index: 28 scientists 74 D-Index: 29 scientists 75 D-Index: 28 scientists 76 D-Index: 22 scientists 77 D-Index: 21 scientists 78 D-Index: 25 scientists 79 D-Index: 26 scientists 80 D-Index: 19 scientists 81 D-Index: 16 scientists 82 D-Index: 12 scientists 83 D-Index: 16 scientists 84 D-Index: 14 scientists 85 D-Index: 11 scientists 86 D-Index: 17 scientists 87 D-Index: 13 scientists 88 D-Index: 10 scientists 89 D-Index: 12 scientists 90 D-Index: 18 scientists 91 D-Index: 16 scientists 92 D-Index: 16 scientists 93 D-Index: 17 scientists 94 D-Index: 12 scientists 95 D-Index: 8 scientists 96 D-Index: 9 scientists 97 D-Index: 9 scientists 98 D-Index: 11 scientists 99 D-Index: 12 scientists 100 D-Index: 5 scientists 101 D-Index: 8 scientists 102 D-Index: 4 scientists 103 D-Index: 11 scientists 104 D-Index: 5 scientists 105 D-Index: 9 scientists 106 D-Index: 7 scientists 107 D-Index: 4 scientists 108 D-Index: 8 scientists 109+ D-Index: 99 scientists
30 D-Index 109+

This scientist: 53 D-Index — 73rd percentile

73% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 109 D-Index or more.

Overview

What is he best known for?

The fields of study he is best known for:

  • Gene
  • Botany
  • Genetics

His scientific interests lie mostly in Hordeum vulgare, Genetics, Botany, Locus and Quantitative trait locus. He interconnects Cultivar, Dwarfing, Genetic diversity and Seedling in the investigation of issues within Hordeum vulgare. The Botany study combines topics in areas such as Gene pool, Genetic variation, Genotype and Horticulture.

His Locus research includes elements of Domestication, Allele and Restriction fragment length polymorphism. In his study, Haplotype and Environmental change is inextricably linked to Agriculture, which falls within the broad field of Allele. Quantitative trait locus and Chromosome are commonly linked in his work.

His most cited work include:

  • Natural variation in a homolog of Antirrhinum CENTRORADIALIS contributed to spring growth habit and environmental adaptation in cultivated barley (332 citations)
  • INTERMEDIUM-C, a modifier of lateral spikelet fertility in barley, is an ortholog of the maize domestication gene TEOSINTE BRANCHED 1 (237 citations)
  • Genome-wide association mapping to candidate polymorphism resolution in the unsequenced barley genome. (211 citations)

What are the main themes of his work throughout his whole career to date?

The scientist’s investigation covers issues in Hordeum vulgare, Quantitative trait locus, Genetics, Agronomy and Botany. His Hordeum vulgare research is included under the broader classification of Poaceae. His Quantitative trait locus research includes themes of Candidate gene, Association mapping, Germplasm and Genetic variation.

His study in Agronomy is interdisciplinary in nature, drawing from both Plant disease resistance and Transgressive segregation. His Botany research incorporates elements of Ploidy, Abiotic stress and Horticulture. His research in Allele intersects with topics in Domestication and Genome-wide association study.

He most often published in these fields:

  • Hordeum vulgare (43.75%)
  • Quantitative trait locus (35.16%)
  • Genetics (34.38%)

What were the highlights of his more recent work (between 2016-2021)?

  • Quantitative trait locus (35.16%)
  • Genetics (34.38%)
  • Agronomy (34.38%)

In recent papers he was focusing on the following fields of study:

The scientist’s investigation covers issues in Quantitative trait locus, Genetics, Agronomy, Nested association mapping and Cultivar. His work carried out in the field of Quantitative trait locus brings together such families of science as Germplasm, Association mapping, Locus, Genetic variation and Candidate gene. His research on Genetics frequently connects to adjacent areas such as Hordeum vulgare.

His studies in Hordeum vulgare integrate themes in fields like Genetic marker and Flavor. His Agronomy research is multidisciplinary, incorporating perspectives in Pollen, Emasculation, Pollination and Inbreeding. The various areas that William T. B. Thomas examines in his Nested association mapping study include Phenotype, Crop yield and Introgression.

Between 2016 and 2021, his most popular works were:

  • Development and Evaluation of a Barley 50k iSelect SNP Array. (95 citations)
  • Barley SIX-ROWED SPIKE3 encodes a putative Jumonji C-type H3K9me2/me3 demethylase that represses lateral spikelet fertility. (45 citations)
  • Barley yield formation under abiotic stress depends on the interplay between flowering time genes and environmental cues. (31 citations)

In his most recent research, the most cited papers focused on:

  • Gene
  • Botany
  • Genetics

William T. B. Thomas focuses on Genetics, Allele, Hordeum vulgare, Nested association mapping and Quantitative trait locus. His Genetics study frequently links to adjacent areas such as Computational biology. His Allele study improves the overall literature in Gene.

His research integrates issues of Horticulture, Flavor, Leucine zipper and Histone H4, Transcription in his study of Hordeum vulgare. His Nested association mapping research is multidisciplinary, incorporating elements of Cultivar, Germplasm, Agronomy, Genotype and Genetic variation. His Quantitative trait locus study integrates concerns from other disciplines, such as Genomics, Gene map and Candidate gene.

Best Publications

  • Natural variation in a homolog of Antirrhinum CENTRORADIALIS contributed to spring growth habit and environmental adaptation in cultivated barley

    Jordi Comadran;Benjamin Kilian;Joanne Russell;Luke Ramsay

  • INTERMEDIUM-C, a modifier of lateral spikelet fertility in barley, is an ortholog of the maize domestication gene TEOSINTE BRANCHED 1

    Luke Ramsay;Jordi Comadran;Arnis Druka;David F Marshall

  • Crops that feed the world 4. Barley: a resilient crop? Strengths and weaknesses in the context of food security

    Adrian Clive Newton;Andrew J. Flavell;Timothy S. George;Philip Leat

  • Barley: a translational model for adaptation to climate change

    Ian K. Dawson;Joanne Russell;Wayne Powell;Brian Steffenson

  • Genome-wide association mapping to candidate polymorphism resolution in the unsequenced barley genome.

    James Cockram;Jon White;Diana L. Zuluaga;David Smith

  • Development and Evaluation of a Barley 50k iSelect SNP Array.

    Micha M. Bayer;Paulo Rapazote-Flores;Martin Ganal;Pete E. Hedley

  • Flapjack--graphical genotype visualization.

    Iain Milne;Paul D. Shaw;Gordon Stephen;Micha Bayer

  • Doubled Haploids in Genetics and Plant Breeding

    Brian P. Forster;William T. B. Thomas

  • Root phenomics of crops: opportunities and challenges

    Peter J. Gregory;A. Glyn Bengough;Dmitri V. Grinev;Sonja Schmidt

  • Introgression of quantitative trait loci (QTLs) determining stripe rust resistance in barley: an example of marker-assisted line development

    T. Toojinda;E. Baird;A. Booth;L.H.M. Broers

  • The development and application of molecular markers for abiotic stress tolerance in barley.

    B.P. Forster;R.P. Ellis;W.T.B. Thomas;A.C. Newton

  • Detection of quantitative trait loci for agronomic, yield, grain and disease characters in spring barley (Hordeum vulgare L.).

    W. T. B. Thomas;W. Powell;R. Waugh;K. J. Chalmers

  • A retrospective analysis of spring barley germplasm development from 'foundation genotypes' to currently successful cultivars

    Joanne R. Russell;Roger P. Ellis;William T.B. Thomas;Robbie Waugh

  • Gel observation chamber for rapid screening of root traits in cereal seedlings

    A.G. Bengough;D.C. Gordon;H. Al-Menaie;R.P. Ellis

  • Analysis of simple sequence repeats (SSRs) in wild barley from the Fertile Crescent: associations with ecology, geography and flowering time.

    Victor Ivandic;Christine A. Hackett;Eviatar Nevo;Richard Keith

  • Identification of RAPD markers linked to a Rhynchosporium secalis resistance locus in barley using near-isogenic lines and bulked segregant analysis.

    U M Barua;K J Chalmers;C A Hackett;W T B Thomas

  • Analysis of quantitative traits in barley by the use of Amplified Fragment Length Polymorphisms

    W Powell;W T B Thomas;E Baird;P Lawrence

  • Phenotype/genotype associations for yield and salt tolerance in a barley mapping population segregating for two dwarfing genes.

    R. P. Ellis;B. P. Forster;D. C. Gordon;L. L. Handley

  • Analysis of improvements in nitrogen use efficiency associated with 75 years of spring barley breeding

    I.J. Bingham;A.J. Karley;P.J. White;W.T.B. Thomas

  • A trade off between mlo resistance to powdery mildew and increased susceptibility of barley to a newly important disease, Ramularia leaf spot

    Graham R. D. McGrann;Anna Stavrinides;Joanne Russell;Margaret M. Corbitt

  • The effect of semi-dwarf genes on root system size in field grown barley

    Oldrich Chloupek;Brian P. Forster;William T. B. Thomas

  • Doubled haploids in breeding

    W. T. B. Thomas;B. P. Forster;B. Gertsson

  • Understanding the genetic control and physiological traits associated with rhizosheath production by barley (Hordeum vulgare).

    Timothy S. George;Lawrie K. Brown;Luke Ramsay;Philip J. White

  • Prospects for molecular breeding of barley

    W T B Thomas

  • Molecular mapping of genes determining height, time to heading, and growth habit in barley (Hordeum vulgare)

    U. M. Barua;K. J. Chalmers;W. T. B. Thomas;C. A. Hackett

  • Quantitative Trait Loci for Germination and Malting Quality Characters in a Spring Barley Cross

    W. T. B. Thomas;W. Powell;J. S. Swanston;R. P. Ellis

Frequent Co-Authors

Wayne Powell
Wayne Powell Scotland's Rural College
Robbie Waugh
Robbie Waugh James Hutton Institute
Joanne Russell
Joanne Russell James Hutton Institute
Brian P. Forster
Brian P. Forster International Atomic Energy Agency
Adrian C. Newton
Adrian C. Newton James Hutton Institute
Luke Ramsay
Luke Ramsay James Hutton Institute
Ignacio Romagosa
Ignacio Romagosa University of Lleida
Nicola Pecchioni
Nicola Pecchioni The Canadian Real Estate Association
F.A. van Eeuwijk
F.A. van Eeuwijk Wageningen University & Research
Andrew J. Flavell
Andrew J. Flavell University of Dundee

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