Evidence map›Paper›PMID 29036290›Full record

ArticleGenome biology and evolution2017

Comparative Genomics of Apomictic Root-Knot Nematodes: Hybridization, Ploidy, and Dynamic Genome Change.

Amir Szitenberg, Laura Salazar-Jaramillo, Vivian C Blok, Dominik R Laetsch, Soumi Joseph, Valerie M Williamson, Mark L Blaxter, David H Lunt

Open access · goldAbstract readComparative Study
In one paragraph

Article in Genome biology and evolution, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 64 papers.

0numbers the graph read from it
0cells of the map it votes in
64citing papers in PubMed
31.9field-weighted citation impact, top 1% 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

64 citing papers in PubMed, 127 citations in OpenAlex.

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  9. Journal of nematology · 2025
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4 more citing papers are in PubMed but not listed here.

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 5 institutions in 3 countries.

Amir SzitenbergEvolutionary Biology Group, School of Environmental Sciences, University of Hull, United Kingdom.
Laura Salazar-JaramilloInstitute of Evolutionary Biology, School of Biological Sciences, University of Edinburgh, United Kingdom.
Vivian C BlokThe James Hutton Institute, Invergowrie, Dundee, United Kingdom.
Dominik R LaetschInstitute of Evolutionary Biology, School of Biological Sciences, University of Edinburgh, United Kingdom.
Soumi JosephDepartment of Entomology and Nematology, University of Florida.
Valerie M WilliamsonDepartment of Plant Pathology, University of California, Davis.
Mark L BlaxterInstitute of Evolutionary Biology, School of Biological Sciences, University of Edinburgh, United Kingdom.
David H LuntEvolutionary Biology Group, School of Environmental Sciences, University of Hull, United Kingdom.
University of Edinburgh · GBUniversity of Hull · GBJames Hutton Institute · GBUniversity of California, Davis · USUniversity of Florida · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The root-knot nematodes (genus Meloidogyne) are important plant parasites causing substantial agricultural losses. The Meloidogyne incognita group (MIG) of species, most of which are obligatory apomicts (mitotic parthenogens), are extremely polyphagous and important problems for global agriculture. While understanding the genomic basis for their variable success on different crops could benefit future agriculture, analyses of their genomes are challenging due to complex evolutionary histories that may incorporate hybridization, ploidy changes, and chromosomal fragmentation. Here, we sequence 19 genomes, representing five species of key root-knot nematodes collected from different geographic origins. We show that a hybrid origin that predated speciation within the MIG has resulted in each species possessing two divergent genomic copies. Additionally, the apomictic MIG species are hypotriploids, with a proportion of one genome present in a second copy. The hypotriploid proportion varies among species. The evolutionary history of the MIG genomes is revealed to be very dynamic, with noncrossover recombination both homogenizing the genomic copies, and acting as a mechanism for generating divergence between species. Interestingly, the automictic MIG species M. floridensis differs from the apomict species in that it has become homozygous throughout much of its genome.

Indexed as

Evolution, MolecularGenomicsHybridization, GeneticPloidiesAnimalsGenetic SpeciationGenetic VariationGenome, HelminthGenome, MitochondrialParthenogenesisPhylogenyPlant DiseasesPlant RootsSequence Analysis, DNATylenchoideacoverage ratiogenome evolutionMeloidogynephylogenomicsrecombination

Identifiers

PMID29036290
PMCPMC5737495
OpenAlexW2951493739

What OpenQuestion holds

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LicenceCC BY
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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.