Caenorhabditis remanei
{{Short description|Species of roundworm}}
{{Speciesbox
| genus = Caenorhabditis
| species = remanei
| authority = (Sudhaus, 1974)
}}
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.[http://genome.wustl.edu/genomes/view/caenorhabditis_remanei/ C. remanei.] {{Webarchive|url=https://web.archive.org/web/20110720120731/http://genome.wustl.edu/genomes/view/caenorhabditis_remanei/ |date=2011-07-20 }} The Genome Center at Washington University.
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. 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.Baird, S. E. (1999). [http://www.wright.edu/~scott.baird/BairdPubs/Baird99.pdf Natural and experimental associations of Caenorhabditis remanei with Trachelipus rathkii and other terrestrial isopods.] Nematology 1:5 471.
Genetics
The genome of this nematode has been sequenced, and it was found to contain about 26,000 genes.Haag, E. S., et al. (2008). [http://www.life.umd.edu/biology/haag/Haag_etal.PortugalMeeting_TIG.pdf Caenorhabditis evolution: if they all look alike, you aren’t looking hard enough.] Trends in Genetics 23:3.
This species groups with C. latens in the 'Elegans' supergroup in phylogenetic studies.
Mating and reproduction
Unlike many other Caenorhabditis species, which are hermaphrodites, C. remanei has both males and females. The male of this species employs a mating plug.Timmermeyer, N., et al. (2010). [http://www.frontiersinzoology.com/content/7/1/28 The function of copulatory plugs in Caenorhabditis remanei: hints for female benefits.] Frontiers in Zoology 7:28. 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.Sudhaus, W. and K. Kiontke. (2007). [http://www.mapress.com/zootaxa/2007f/zt01456p062.pdf 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.
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.{{cite journal|pmid=17542844 |date=2007 |last1=Dolgin |first1=E. S. |last2=Charlesworth |first2=B. |last3=Baird |first3=S. E. |last4=Cutter |first4=A. D. |title=Inbreeding and outbreeding depression in Caenorhabditis nematodes |journal=Evolution; International Journal of Organic Evolution |volume=61 |issue=6 |pages=1339–1352 |doi=10.1111/j.1558-5646.2007.00118.x |s2cid=24231269 |doi-access=free }} Over time the decline in fitness accumulated and nearly 90% of inbred lines went extinct.
References
{{Reflist}}
External links
{{Scholia|topic}}
- [http://genome.ucsc.edu/cgi-bin/hgGateway?org=C.+remanei&db=caeRem3&hgsid=148477528 C. remanei Genome Sequencing.]
{{CCBYSASource|sourcepath=http://www.wormbook.org/chapters/www_ecolCaenorhabditis/ecolCaenorhabditis.html|sourcearticle=WormBook|revision=413136865}}
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