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Denaturing Gradient Gel Electrophoresis (DGGE) as a tool for the characterisation of Brachionus sp. Strains
Dooms, S.; Papakostas, S.; Hoffman, S.; Delbare, D.; Dierckens, K.; Triantafyllidis, A.; De Wolf, T.; Vadstein, O.; Abatzopoulos, T.J.; Sorgeloos, P.; Bossier, P. (2007). Denaturing Gradient Gel Electrophoresis (DGGE) as a tool for the characterisation of Brachionus sp. Strains. Aquaculture 262(1): 29-40. dx.doi.org/10.1016/j.aquaculture.2006.10.001
In: Aquaculture. Elsevier: Amsterdam. ISSN 0044-8486, more
Peer reviewed article

Available in Authors 
    VLIZ: Open Repository 145812 [ OMA ]

Keywords
    Analytical techniques; Aquaculture; DNA; Environmental impact; Evolution; Hatcheries; Marine invertebrates; Mitochondria; Nucleotide sequence; Phylogenetics; Population genetics; Brachionus plicatilis Müller, 1786 [WoRMS]; Monogononta [WoRMS]; Rotifera [WoRMS]; Marine
Author keywords
    rotifers; Brachionus plicatilis; fingerprinting; 16S rRNA gene; mitochondrial DNA; culture crashes

Authors  Top 
  • Dooms, S., more
  • Papakostas, S.
  • Hoffman, S., more
  • Delbare, D., more
  • Dierckens, K., more
  • Triantafyllidis, A.
  • De Wolf, T.
  • Vadstein, O.
  • Abatzopoulos, T.J.
  • Sorgeloos, P., more
  • Bossier, P., more

Abstract
    Many zooplanktonic organisms, like the cyclic parthenogenetic rotifer Brachionus plicatilis (Rotifera: Monogononta), are actually a complex of species and biotypes with a high degree of morphological similarity (i.e. cryptic species). Various phylogenetic studies with molecular markers (e.g. ITS1 and COI) on wild Brachionus populations described the presence of at least nine genetically divergent Brachionus species and biotypes. Because different studies found evidence that these cryptic species and biotypes differ significantly in ecological preferences and thus probably behave differently in response to rearing conditions in the hatchery, questions rise on the actual identity of the rotifer strains used in aquaculture, where Brachionus discrimination is still based on morphology. This study is a part of an investigation of the genetic make-up of strains used in hatcheries, aquaculture research institutes and laboratories, and describes the rapid and sensitive PCR-DGGE method for the detection of Brachionus species and biotypes based on nucleotide sequence variation within the mitochondrial 16S rRNA gene. Considerable genetic diversity was found, albeit smaller within hatcheries than within laboratories and aquaculture research institutes. All 16S haplotypes produced an unambiguous DGGE fingerprint out of which a database was constructed.

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