Evidence map›Paper›PMID 26450274›Full record

ArticleTAG. Theoretical and applied genetics. Theoretische und angewandte Genetik2016

A major QTL corresponding to the Rk locus for resistance to root-knot nematodes in cowpea (Vigna unguiculata L. Walp.).

Bao-Lam Huynh, William C Matthews, Jeffrey D Ehlers, Mitchell R Lucas, Jansen R P Santos, Arsenio Ndeve, Timothy J Close, Philip A Roberts

Open access · hybridAbstract read
In one paragraph

Article in TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed
9.3field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

28 citing papers in PubMed, 75 citations in OpenAlex.

  1. Novel quantitative trait loci conferring resistance to root-knot nematodes in lima bean (Molecular breeding : new strategies in plant improvement · 2026
    Article
  2. Article
  3. Article
  4. Combating Root-Knot Nematodes (Plants (Basel, Switzerland) · 2025
    Review
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Cowpea Constraints and Breeding in Europe.Plants (Basel, Switzerland) · 2023
    Review
  11. TomatoJournal of nematology · 2023
    Article
  12. Review
  13. Article
  14. Article
  15. Article
  16. Genome-wide association study for resistance to the Meloidogyne javanica causing root-knot nematode in soybean.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2021
    Article
  17. Article
  18. Article
  19. Review
  20. Towards Exploitation of Adaptive Traits for Climate-Resilient Smart Pulses.International journal of molecular sciences · 2019
    Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 2 institutions in 1 country.

Bao-Lam HuynhDepartment of Nematology, University of California, Riverside, CA, 92521, USA. baolam.huynh@ucr.edu.
William C MatthewsDepartment of Nematology, University of California, Riverside, CA, 92521, USA.
Jeffrey D EhlersBill and Melinda Gates Foundation, Seattle, WA, 98102, USA.
Mitchell R LucasDepartment of Botany and Plant Sciences, University of California, Riverside, CA, 92521, USA.
Jansen R P SantosDepartment of Nematology, University of California, Riverside, CA, 92521, USA.
Arsenio NdeveDepartment of Nematology, University of California, Riverside, CA, 92521, USA.
Timothy J CloseDepartment of Botany and Plant Sciences, University of California, Riverside, CA, 92521, USA.
Philip A RobertsDepartment of Nematology, University of California, Riverside, CA, 92521, USA. philip.roberts@ucr.edu.
University of California, Riverside · USBill & Melinda Gates Foundation · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

key messageGenome resolution of a major QTL associated with the Rk locus in cowpea for resistance to root-knot nematodes has significance for plant breeding programs and R gene characterization. Cowpea (Vigna unguiculata L. Walp.) is a susceptible host of root-knot nematodes (Meloidogyne spp.) (RKN), major plant-parasitic pests in global agriculture. To date, breeding for host resistance in cowpea has relied on phenotypic selection which requires time-consuming and expensive controlled infection assays. To facilitate marker-based selection, we aimed to identify and map quantitative trait loci (QTL) conferring the resistance trait. One recombinant inbred line (RIL) and two F2:3 populations, each derived from a cross between a susceptible and a resistant parent, were genotyped with genome-wide single nucleotide polymorphism (SNP) markers. The populations were screened in the field for root-galling symptoms and/or under growth-chamber conditions for nematode reproduction levels using M. incognita and M. javanica biotypes. One major QTL was mapped consistently on linkage group VuLG11 of each population. By genotyping additional cowpea lines and near-isogenic lines derived from conventional backcrossing, we confirmed that the detected QTL co-localized with the genome region associated with the Rk locus for RKN resistance that has been used in conventional breeding for many decades. This chromosomal location defined with flanking markers will be a valuable target in marker-assisted breeding and for positional cloning of genes controlling RKN resistance.

Indexed as

Quantitative Trait LociTylenchoideaAnimalsChromosome MappingCrosses, GeneticDisease ResistanceFabaceaeGenetic LinkageGenotypePhenotypePlant DiseasesPlant RootsPolymorphism, Single Nucleotide

Identifiers

PMID26450274
PMCPMC4703619
OpenAlexW1913813195

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.