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Analysis of 15 autosomal STR loci from Mar del Plata and Bahia Blanca (Central Region of Argentina)

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Abstract

Allele frequencies for the 15 short tandem repeats (STRs) loci included in the AmpFlSTR® Identifiler kit were estimated in a sample of unrelated individuals from Mar del Plata (MDQ; N = 180) and Bahia Blanca (BB; N = 85) (Buenos Aires, Argentina). Biological samples were obtained from voluntary donors and forensic cases. Both populations were in Hardy–Weinberg equilibrium after Bonferroni correction, except for locus vWA in MDQ and D2S1338 in BB. FGA was the most informative locus, and the least discriminating locus was TPOX in both samples. The combined power of discrimination (PDc) and the combined probability of exclusion (PEc) were similar in MDQ and BB samples (0.999999998 < PDc < 0.999999999 and 0.999999979 < PEc < 0.999999989). The multidimentional scaling plot from Rst genetic distance matrix and the interethnic admixture estimation supported a higher European contribution in populations of the central region compared with populations from other regions of Argentina with higher Amerindian composition. These results enlarge the Argentine databases of autosomal STR loci, revealed as an excellent tool for human identification tests and population genetic analysis.

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Acknowledgments

We thank the blood donors, who were adequately informed about the aims of the study and gave consent to perform this research and to the Laboratorio de Genética Forense de San Martín, Provincia de Buenos Aires for their technical support.

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Authors and Affiliations

  1. Unidad de Diversidad, Sistemática y Evolución, Laboratorio de Biologia Molecular, Centro Nacional Patagonico-CONICET, Bvd. Brown 2915, Puerto Madryn, Chubut, Argentina

    María Laura Parolin

  2. Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal 643, Barcelona, Spain

    Robert Carreras-Torres

  3. Departamento de Genética Forense, Superintendencia de Policía Científica, Ministerio de Seguridad de la Provincia de Buenos Aires, Calle 91 1829, San Martín, Buenos Aires, Argentina

    Lorena Andrea Sambuco & Stella Maris Jaureguiberry

  4. Asociación de Genética Humana de Mar del Plata, Av. Colon 3853, Mar del Plata, Buenos Aires, Argentina

    Celia Estela Iudica

Authors
  1. María Laura Parolin
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  2. Robert Carreras-Torres
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  3. Lorena Andrea Sambuco
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  4. Stella Maris Jaureguiberry
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  5. Celia Estela Iudica
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Corresponding author

Correspondence to María Laura Parolin.

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Supplemental Fig. 1

Map of Argentina showing location of Mar del Plata (*; 38°00’W, 57°33’S) and Bahia Blanca (*; 38°43’W, 62°15’S) from this study, and ten admixed Argentinean populations from the literature. (DOCX 549 kb)

Supplemental Fig. 2

Two dimensional MDS plot based on Rst values between pair’s populations. Stress value: 0.054. Central Region = MDQ: Mar del Plata (this study), BB: Bahia Blanca (this study), BSAS: Buenos Aires, STF: Santa Fe, MENZ: Mendoza. North Eastern Region = MISIO: Misiones, CHAC: Chaco. North Western Region = SLT: Salta, CALCH.V: Calchaqui Valleys. Southern Region-Patagonia = RION: Rio Negro, CHBT: Chubut, NQN: Neuquén. ● Parental populations = Amerindians from Gran Chaco: AMER; Europeans = Spain: SPN and Italy: ITL; African population = Mozambique: MZB. (DOCX 93 kb)

Supplemental Table 1

Allele frequencies distribution and statistical parameters of 15 STR loci observed in the Mar del Plata sample. (DOCX 100 kb)

Supplemental Table 2

Allele frequencies distribution and statistical parameters of 15 STR loci observed in the Bahia Blanca sample. (DOCX 62 kb)

Supplemental Table 3

Populations obtained from the literature. (DOCX 28 kb)

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Parolin, M.L., Carreras-Torres, R., Sambuco, L.A. et al. Analysis of 15 autosomal STR loci from Mar del Plata and Bahia Blanca (Central Region of Argentina). Int J Legal Med 128, 457–459 (2014). https://doi.org/10.1007/s00414-013-0937-1

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  • DOI: https://doi.org/10.1007/s00414-013-0937-1

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