Abstract
Antarctic krill (Euphausia superba Dana) is a key species in the Antarctic food web and occurs on a circumcontinental scale. Population genetic structure of this species was investigated by sequence analysis of the ND1 mitochondrial gene in four population samples collected at different geographical localities around the Antarctic continent. Results indicate the existence of significant genetic differences between samples, and we suggest that oceanographic barriers could be sufficiently strong and temporally stable to restrict gene flow between distinct areas. Moreover, our data indicate that Antarctic krill is not at mutation-drift equilibrium and that the species possibly has a low effective population size as compared to the census size.
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Selected References
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- Avise J. C. Ten unorthodox perspectives on evolution prompted by comparative population genetic findings on mitochondrial DNA. Annu Rev Genet. 1991;25:45–69. doi: 10.1146/annurev.ge.25.120191.000401. [DOI] [PubMed] [Google Scholar]
- Chakraborty R. Mitochondrial DNA polymorphism reveals hidden heterogeneity within some Asian populations. Am J Hum Genet. 1990 Jul;47(1):87–94. [PMC free article] [PubMed] [Google Scholar]
- Ewens W. J. The sampling theory of selectively neutral alleles. Theor Popul Biol. 1972 Mar;3(1):87–112. doi: 10.1016/0040-5809(72)90035-4. [DOI] [PubMed] [Google Scholar]
- Excoffier L., Smouse P. E., Quattro J. M. Analysis of molecular variance inferred from metric distances among DNA haplotypes: application to human mitochondrial DNA restriction data. Genetics. 1992 Jun;131(2):479–491. doi: 10.1093/genetics/131.2.479. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Frankham R. Conservation genetics. Annu Rev Genet. 1995;29:305–327. doi: 10.1146/annurev.ge.29.120195.001513. [DOI] [PubMed] [Google Scholar]
- Knowlton N., Weigt L. A., Solórzano L. A., Mills D. K., Bermingham E. Divergence in proteins, mitochondrial DNA, and reproductive compatibility across the isthmus of Panama. Science. 1993 Jun 11;260(5114):1629–1632. doi: 10.1126/science.8503007. [DOI] [PubMed] [Google Scholar]
- Rogers A. R., Harpending H. Population growth makes waves in the distribution of pairwise genetic differences. Mol Biol Evol. 1992 May;9(3):552–569. doi: 10.1093/oxfordjournals.molbev.a040727. [DOI] [PubMed] [Google Scholar]
- Tajima F. Statistical method for testing the neutral mutation hypothesis by DNA polymorphism. Genetics. 1989 Nov;123(3):585–595. doi: 10.1093/genetics/123.3.585. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Tamura K., Nei M. Estimation of the number of nucleotide substitutions in the control region of mitochondrial DNA in humans and chimpanzees. Mol Biol Evol. 1993 May;10(3):512–526. doi: 10.1093/oxfordjournals.molbev.a040023. [DOI] [PubMed] [Google Scholar]
- Walsh P. S., Metzger D. A., Higuchi R. Chelex 100 as a medium for simple extraction of DNA for PCR-based typing from forensic material. Biotechniques. 1991 Apr;10(4):506–513. [PubMed] [Google Scholar]
- Watterson G. A. The homozygosity test of neutrality. Genetics. 1978 Feb;88(2):405–417. doi: 10.1093/genetics/88.2.405. [DOI] [PMC free article] [PubMed] [Google Scholar]