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Genetic variation within a species of parasitic nematode, Skrjabingylus chitwoodorum, in skunks

Journal of Nematology
Volume 53 (2021): Issue 1 (January 2021)
By:
Open Access
|Jan 2021

Figures & Tables

Figure 1:

Life cycle of Skrjabingylus chitwoodorum in Mephitis mephitis. Large gray arrows correspond to the movement of Skrjabingylus to an intermediate or paratenic host. Large black arrows correspond to the movement to the definitive host. Smaller arrows correspond to a molt occurring and the larva progressing to the next juvenile phase.
Life cycle of Skrjabingylus chitwoodorum in Mephitis mephitis. Large gray arrows correspond to the movement of Skrjabingylus to an intermediate or paratenic host. Large black arrows correspond to the movement to the definitive host. Smaller arrows correspond to a molt occurring and the larva progressing to the next juvenile phase.

Figure 2:

Texas map showing the 25 counties represented in the analysis of Skrjabingylus within Mephitis mephitis hosts. Sample size included if greater than one.
Texas map showing the 25 counties represented in the analysis of Skrjabingylus within Mephitis mephitis hosts. Sample size included if greater than one.

Figure 3:

Maximum likelihood phylogenetic tree of 492 base pair fragment of the cytochrome oxidase I gene for 44 samples of Skrjabingylus. Maximum likelihood analysis was performed using the best-fitting model, Hasegawa-Kishino-Yano of DNA substitution with Gamma distribution. Bootstrap values are based on 1000 replicates and values ≥70 are shown on branches. Number with prefix ASK identifies the specific host from which the sample was collected. Prefix KP is a Genbank accession number.
Maximum likelihood phylogenetic tree of 492 base pair fragment of the cytochrome oxidase I gene for 44 samples of Skrjabingylus. Maximum likelihood analysis was performed using the best-fitting model, Hasegawa-Kishino-Yano of DNA substitution with Gamma distribution. Bootstrap values are based on 1000 replicates and values ≥70 are shown on branches. Number with prefix ASK identifies the specific host from which the sample was collected. Prefix KP is a Genbank accession number.

Figure 4:

Median joining network showing the relationships among haplotypes of 44 samples of Skrjabingylus chitwoodorum from hosts Mephitis mephitis and Spilogale putorius interrupta using COI mtDNA. Sizes of solid black circles correlate to shared haplotypes among multiple counties. Small open circles represent hypothetical haplotypes and ticks on branches represent number of mutational steps.
Median joining network showing the relationships among haplotypes of 44 samples of Skrjabingylus chitwoodorum from hosts Mephitis mephitis and Spilogale putorius interrupta using COI mtDNA. Sizes of solid black circles correlate to shared haplotypes among multiple counties. Small open circles represent hypothetical haplotypes and ticks on branches represent number of mutational steps.

Average Kimura-2 parameter distance among outgroup taxa Skrjabingylus nasicola and Skrjabingylus petrowi and populations of Skrjabingylus chitwoodorum from Mephitis mephitis in various states based on 492 bases of COI_

S. nasicola S. petrowi S. chitwoodorum TexasSouth DakotaNew York
S. nasicola (2) 0.000
S. petrowi (3)0.159 0.005
S. chitwoodorum (39)0.1460.142 0.013
Texas (33)0.1440.147– 0.010
South Dakota (3)a 0.1590.157–0.023 0.030
New York (3)0.1400.134–0.0180.023 0.002
DOI: https://doi.org/10.21307/jofnem-2021-005 | Journal eISSN: 2640-396X | Journal ISSN: 0022-300X
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Language: English
Page range: 1 - 8
Published on: Jan 1, 2021
Published by: Society of Nematologists, Inc.
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year
Keywords:
COI,
Genetics,
Nemata,
Sinus roundworm,
Systematics,
Texas
Related subjects:
Life sciences,
Life sciences, other

© 2021 Allie N. Denham, Malorri R. Hughes, Robert C. Dowler, Nicholas J. Negovetich, Loren K. Ammerman, published by Society of Nematologists, Inc.
This work is licensed under the Creative Commons Attribution 4.0 License.

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