New polymorphic microsatellite loci revealed for the dusky shark Carcharhinus obscurus through Ion Proton double-digest RAD sequencing

Molecular Biology Reports
Simo N MadunaAletta E Bester-van der Merwe

Abstract

The non-model shark species, dusky shark Carcharhinus obscurus, is a bio-economically and recreationally important shark in many areas of its range. Despite of the fishery importance of C. obscurus few genetic resources are currently available for the species. Here, we report on the isolation of eight novel microsatellite loci from C. obscurus using a double-digest restriction site associated DNA (RAD) sequencing approach on the Ion Proton semiconductor platform (ddRADseq-ion). We characterised the loci in 26 individuals and all loci were polymorphic, exhibiting 5-10 alleles (average 6.6), and observed and expected heterozygosities of 0.385-0.962 and 0.479-0.847, respectively. We found that all pairs of loci were in linkage equilibrium and conformed to Hardy-Weinberg expectations. The loci reported in this study are only the second set of microsatellite loci ever characterized for C. obscurus and will be valuable for molecular ecology studies for this vulnerable species.

References

Sep 16, 2006·Ecology Letters·Shelley C ClarkeMahmood S Shivji
Dec 8, 2006·Molecular Biology and Evolution·Marie-Pierre Chapuis, Arnaud Estoup
May 15, 2010·Molecular Ecology·Robert C ThomsonJarrett R Johnson
Jun 26, 2012·Nucleic Acids Research·Andreas UntergasserSteven G Rozen
Apr 5, 2013·Mitochondrial DNA·Dean C BlowerJennifer R Ovenden

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Methods Mentioned

BETA
genotyping
PCR

Software Mentioned

FREENA
CloneWell
GENEMAPPER
FSTAT
BLASTn
Ion Torrent
BLAST

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