World's Best Scientists 2026 revealed!

D-Index & Metrics

Plant Science and Agronomy

D-Index
56
Citations
9053
World Ranking
1561
National Ranking
417

Philip A. Roberts 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 Philip A. Roberts 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: 168 publications — 66th percentile

66% of scientists in this discipline score the same or lower.

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

Philip A. Roberts 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 Philip A. Roberts 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: 56 D-Index — 77th percentile

77% of scientists in this discipline score the same or lower.

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

Research.com Recognitions

  • 2001 - Fellow of the American Association for the Advancement of Science (AAAS)

Overview

What is he best known for?

The fields of study he is best known for:

  • Gene
  • Social science
  • Genetics

Philip A. Roberts focuses on Genetics, Vigna, Botany, Plant breeding and Agronomy. Much of his study explores Genetics relationship to Meloidogyne incognita. The various areas that Philip A. Roberts examines in his Vigna study include Amplified fragment length polymorphism, Genotype and Drought tolerance.

The concepts of his Botany study are interwoven with issues in Genetic variability, Maximum parsimony, Crop and Terra incognita. His Agronomy study integrates concerns from other disciplines, such as Callosobruchus maculatus and Fusarium wilt. While the research belongs to areas of Synteny, he spends his time largely on the problem of Quantitative trait locus, intersecting his research to questions surrounding Single-nucleotide polymorphism.

His most cited work include:

  • A consensus genetic map of cowpea [Vigna unguiculata (L) Walp.] and synteny based on EST-derived SNPs (189 citations)
  • Current Status of the Availability, Development, and Use of Host Plant Resistance to Nematodes (133 citations)
  • Identification and comparative analysis of drought-associated microRNAs in two cowpea genotypes (130 citations)

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

Philip A. Roberts mainly investigates Genetics, Botany, Vigna, Quantitative trait locus and Meloidogyne incognita. His work on Genetics deals in particular with Gene, Locus, Gene mapping, Genetic marker and Genome. His Botany course of study focuses on Meloidogyne arenaria and Arachis.

His Vigna study is associated with Agronomy. His Quantitative trait locus research integrates issues from Single-nucleotide polymorphism, Fusarium wilt, Inbred strain and Candidate gene. His research in Meloidogyne incognita focuses on subjects like Plant disease resistance, which are connected to Introgression.

He most often published in these fields:

  • Genetics (34.24%)
  • Botany (23.37%)
  • Vigna (21.74%)

What were the highlights of his more recent work (between 2017-2021)?

  • Genetics (34.24%)
  • Vigna (21.74%)
  • Quantitative trait locus (18.48%)

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

His scientific interests lie mostly in Genetics, Vigna, Quantitative trait locus, Gene and Single-nucleotide polymorphism. His Genetics study frequently draws connections to other fields, such as Macrophomina phaseolina. His Vigna study combines topics from a wide range of disciplines, such as Insect, Crop and Infestation.

His Quantitative trait locus research includes themes of Horticulture, Chromosome, Allele, Locus and Candidate gene. Philip A. Roberts combines subjects such as Meloidogyne incognita, Terra incognita, Root-knot nematode and Virulence with his study of Horticulture. His work in the fields of Gene, such as Soybean cyst nematode, intersects with other areas such as Gram.

Between 2017 and 2021, his most popular works were:

  • The genome of cowpea (Vigna unguiculata [L.] Walp.) (70 citations)
  • A multi-parent advanced generation inter-cross (MAGIC) population for genetic analysis and improvement of cowpea (Vigna unguiculata L. Walp.) (47 citations)
  • Identification of QTL controlling domestication-related traits in cowpea (Vigna unguiculata L. Walp). (31 citations)

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

  • Gene
  • Social science
  • Genetics

His primary areas of study are Genetics, Quantitative trait locus, Single-nucleotide polymorphism, Vigna and Gene. Many of his studies involve connections with topics such as Fungus and Genetics. His Quantitative trait locus research incorporates themes from Inbred strain and Candidate gene.

His work carried out in the field of Single-nucleotide polymorphism brings together such families of science as Genetic distance, Genetic diversity, Biotechnology, Genomics and Genotyping. As part of his studies on Vigna, Philip A. Roberts often connects relevant subjects like Genome. His studies in Gene integrate themes in fields like Salicylic acid, Pathogen and Macrophomina phaseolina.

Best Publications

  • A consensus genetic map of cowpea [Vigna unguiculata (L) Walp.] and synteny based on EST-derived SNPs

    Wellington Muchero;Ndeye N. Diop;Prasanna R. Bhat;Raymond D. Fenton

  • Current Status of the Availability, Development, and Use of Host Plant Resistance to Nematodes

    Philip A. Roberts

  • Development of cowpea cultivars and germplasm by the Bean/Cowpea CRSP

    Anthony E. Hall;Ndiaga Cisse;Samba Thiaw;Hassan O.A. Elawad

  • Identification and comparative analysis of drought-associated microRNAs in two cowpea genotypes

    Blanca E Barrera-Figueroa;Lei Gao;Ndeye N Diop;Zhigang Wu

  • Genome resources for climate-resilient cowpea, an essential crop for food security.

    María Muñoz‐Amatriaín;Hamid Mirebrahim;Pei Xu;Steve I. Wanamaker

  • Concepts and consequences of resistance.

    P. A. Roberts;J. L. Starr;R. Cook;J. Bridge

  • Genomic Tools in Cowpea Breeding Programs: Status and Perspectives

    Ousmane Boukar;Christian A. Fatokun;Bao-Lam Huynh;Philip A. Roberts

  • Conceptual and practical aspects of variability in root-knot nematodes related to host plant resistance.

    P A Roberts

  • The heat-stable root-knot nematode resistance gene Mi-9 from Lycopersicon peruvianum is localized on the short arm of chromosome 6.

    J. S. S. Ammiraju;J. C. Veremis;X. Huang;P. A. Roberts

  • An improved genetic linkage map for cowpea (Vigna unguiculata L.) Combining AFLP, RFLP, RAPD, biochemical markers, and biological resistance traits

    J T Ouédraogo;B S Gowda;M Jean;T J Close

  • Genetic diversity of cowpea [Vigna unguiculata (L.) Walp.] in four West African and USA breeding programs as determined by AFLP analysis

    Jinggui Fang;Chih-Cheng T. Chao;Philip A. Roberts;Jeffrey D. Ehlers

  • Genic SNP markers and legume synteny reveal candidate genes underlying QTL for Macrophomina phaseolina resistance and maturity in cowpea [Vigna unguiculata (L) Walp.]

    Wellington Muchero;Wellington Muchero;Jeffrey D Ehlers;Timothy J Close;Philip A Roberts

  • Mapping QTL for drought stress-induced premature senescence and maturity in cowpea [Vigna unguiculata (L.) Walp.].

    Wellington Muchero;Jeffrey D. Ehlers;Timothy J. Close;Philip A. Roberts

  • Gene Pools and the Genetic Architecture of Domesticated Cowpea

    Bao-Lam Huynh;Timothy J. Close;Philip A. Roberts;Zhiqiu Hu

  • A multi-parent advanced generation inter-cross (MAGIC) population for genetic analysis and improvement of cowpea (Vigna unguiculata L. Walp.)

    Bao‐Lam Huynh;Jeffrey D. Ehlers;Bevan Emma Huang;María Muñoz‐Amatriaín

  • The Mi-9 Gene from Solanum arcanum Conferring Heat-Stable Resistance to Root-Knot Nematodes Is a Homolog of Mi-1

    Barbara Jablonska;Jetty S.S. Ammiraju;Kishor K. Bhattarai;Sophie Mantelin

  • A phylogenetic framework for root lesion nematodes of the genus Pratylenchus (Nematoda): Evidence from 18S and D2-D3 expansion segments of 28S ribosomal RNA genes and morphological characters.

    Sergei A. Subbotin;Erik J. Ragsdale;Teresa Mullens;Philip A. Roberts

  • Cowpea–Soybean Synteny Clarified through an Improved Genetic Map

    Mitchell R. Lucas;Ndeye-Ndack Diop;Steve Wanamaker;Jeffery D. Ehlers

  • The future of nematode management in cotton.

    J. L. Starr;S. R. Koenning;T. L. Kirkpatrick;A. F. Robinson

  • Plant and soil nematodes: societal impact and focus for the future.

    K. R. Barker;R. S. Hussey;L. R. Krusberg;G. W. Bird

  • Genetic architecture of delayed senescence, biomass, and grain yield under drought stress in cowpea.

    Wellington Muchero;Philip A. Roberts;Ndeye N. Diop;Issa Drabo

  • Seedling Stage Drought-Induced Phenotypes and Drought-Responsive Genes in Diverse Cowpea Genotypes

    Wellington Muchero;Jeffrey D. Ehlers;Philip A. Roberts

  • Markers for breeding heat-tolerant cowpea

    Mitchell R. Lucas;Jeffery D. Ehlers;Bao-Lam Huynh;Ndeye-Ndack Diop

  • Genetic mapping and legume synteny of aphid resistance in African cowpea (Vigna unguiculata L. Walp.) grown in California

    Bao-Lam Huynh;Jeffrey D. Ehlers;Arsenio Ndeve;Steve Wanamaker

  • Genetic and physical mapping of candidate genes for resistance to Fusarium oxysporum f.sp. tracheiphilum race 3 in cowpea [Vigna unguiculata (L.) Walp].

    Marti Pottorff;Steve Wanamaker;Yaqin Q. Ma;Jeffrey D. Ehlers;Jeffrey D. Ehlers

Frequent Co-Authors

Timothy J. Close
Timothy J. Close University of California, Riverside
Mauricio Ulloa
Mauricio Ulloa US Department of Agriculture
Stefano Lonardi
Stefano Lonardi University of California, Riverside
Philipp W. Simon
Philipp W. Simon University of Wisconsin–Madison
Andrew Farmer
Andrew Farmer National Center for Genome Resources
Shizhong Xu
Shizhong Xu University of California, Riverside
Ming-Cheng Luo
Ming-Cheng Luo University of California, Davis
Robert L. Nichols
Robert L. Nichols Cotton (United States)
Frank M. You
Frank M. You Agriculture and Agriculture-Food Canada
Robert B. Hutmacher
Robert B. Hutmacher University of California, Davis

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