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The genetic structure of the family Osteoglossidae from different geographical regions was examined using the nuclear 18S ribosomal RNA (18S rDNA) sequence. The results showed that the partial length of 18S rDNA was 1277 bp, and they were relatively conserved in the species of the family Osteoglossidae. A total of 62 (4.83%) polymorphic sites were observed, and 28 haplotypes were defined, which were...
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