The decline of ornamental fish populations in their
native habitats due to over-fishing has brought about the development of
ornamental fish aquaculture, to which fish of the Anabantoidei
suborder are important contributors. The genetic variations among species
of this suborder were examined
by mitochondrial gene sequencing analysis using the cytochrome b and
12S genes. According to the cytochrome b gene, the most similar strains
were Trichogaster trichopterus (gold) and Trichogaster trichopterus (blue) (100%). Trichogaster leerii was less similar to them (86.0%), and
an even lower similarity was found between the species T. trichopterus and Trichogaster labiosus (85.6%). The least similarity was observed
betweenBetta betta and the genera Colisa (50.2%) and
Trichogaster (60.1%). The phylogenetic trees of 12S and cytochrome b were very similar. According to 12S, the similarity between Trichogaster
species was high (91.4% - 100%), and between species of this genus and Colisa
lalia,it was lower (88.4%).
In conclusion, sequence analyses, based on cytochrome b and 12S can
provide a useful tool for the study of the systematic relationships between
species belonging to the Anabantoidei suborder. Moreover, it may support other
parameters used in systematics. Thus, these genes may be applied as genetic
markers in aquaculture.
Cite this paper
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