Caenorhabditis remanei

Caenorhabditis remanei is a species of nematode found in North America and Europe, and likely lives throughout the temperate world. Several strains have been developed in the laboratory.[1]

Caenorhabditis remanei
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Nematoda
Class: Chromadorea
Order: Rhabditida
Family: Rhabditidae
Genus: Caenorhabditis
Species:
C. remanei
Binomial name
Caenorhabditis remanei
(Sudhaus, 1974)

Habitat

This 1-mm nematode lives in soil, compost, and similar materials, where it consumes bacteria. It may be found in association with soil-living invertebrates such as snails, slugs, and pill bugs.[1] It lives with the snail Fruticicola sieboldiana in Japan. It has been associated with the isopods Trachelipus rathkii, Armadillidium nasatum, Cylisticus convexus, and Porcellio scaber in Ohio.[2]

Genetics

The genome of this nematode has been sequenced, and it was found to contain about 26,000 genes.[3]

This species groups with C. latens in the 'Elegans' supergroup in phylogenetic studies.

Mating and reproduction

Unlike many other Caenorhabditis species, which are hermaphrodites,[1] C. remanei has both males and females. The male of this species employs a mating plug.[4] This species can hybridize with Caenorhabditis brenneri, but only when C. remanei males mate with C. brenneri females, and then the offspring are apparently sterile.[5]

When C. remanei individuals that were derived from recently isolated natural populations were inbred they showed dramatic reductions in brood size and relative fitness compared to outcrossed individuals.[6] Over time the decline in fitness accumulated and nearly 90% of inbred lines went extinct.

References
  1. C. remanei. Archived 2011-07-20 at the Wayback Machine The Genome Center at Washington University.
  2. Baird, S. E. (1999). Natural and experimental associations of Caenorhabditis remanei with Trachelipus rathkii and other terrestrial isopods. Nematology 1:5 471.
  3. Haag, E. S., et al. (2008). Caenorhabditis evolution: if they all look alike, you aren’t looking hard enough. Trends in Genetics 23:3.
  4. Timmermeyer, N., et al. (2010). The function of copulatory plugs in Caenorhabditis remanei: hints for female benefits. Frontiers in Zoology 7:28.
  5. Sudhaus, W. and K. Kiontke. (2007). Comparison of the cryptic nematode species Caenorhabditis brenneri sp. n. and C. remanei (Nematoda: Rhabditidae) with the stem species pattern of the Caenorhabditis elegans group. Zootaxa 1456 45-62.
  6. Dolgin, E. S.; Charlesworth, B.; Baird, S. E.; Cutter, A. D. (2007). "Inbreeding and outbreeding depression in Caenorhabditis nematodes". Evolution; International Journal of Organic Evolution. 61 (6): 1339–1352. doi:10.1111/j.1558-5646.2007.00118.x. PMID 17542844. S2CID 24231269.

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