The genetic composition of Argentina prior to the massive immigration era:

MOTTI JMB; RODENAK B; MUZZIO M; RAMALLO V; SANTOS MR; CASTRO C; ALFARO EL; DIPIERRI JE; SCHEIBLE M; SAUNIER JL; IRWIN JA; COBLE MD; BAILLIET G; BRAVI CM

Forensic Science International: Genetics Supplement Series

ELSEVIER IRELAND LTD

Lugar: Ireland; Año: 2009 vol. 2 p. 342 - 343

1875-1768

Massive transatlantic immigration starting in 1860 significantly modified the human genetic landscape of Argentina. In an attempt to analyze the genetic composition of the country previous to this radical change, biological samples and genealogical info were obtained from individuals in La Rioja and San Juan cities in central-western Argentina. MtDNA control region sequences were obtained from individuals of self-reported criollo maternal ancestry, assigned to the (sub)haplogroups they belong to, and assigned a major continental origin. A high proportion of maternal lineages of Native American ancestry (>86%) was found in both populations, as well as similar inputs stemming from West Eurasia and sub-Saharan Africa. In sharp contrast, significant differences in the contribution of Native American (sub)haplogroups were observed. We propose that our results reflect both the differential distribution of Native American populations that contributed to the present-day criollo mtDNA gene pool and a preferential input of immigrants of Chilean origin to San Juan.criollo maternal ancestry, assigned to the (sub)haplogroups they belong to, and assigned a major continental origin. A high proportion of maternal lineages of Native American ancestry (>86%) was found in both populations, as well as similar inputs stemming from West Eurasia and sub-Saharan Africa. In sharp contrast, significant differences in the contribution of Native American (sub)haplogroups were observed. We propose that our results reflect both the differential distribution of Native American populations that contributed to the present-day criollo mtDNA gene pool and a preferential input of immigrants of Chilean origin to San Juan.>86%) was found in both populations, as well as similar inputs stemming from West Eurasia and sub-Saharan Africa. In sharp contrast, significant differences in the contribution of Native American (sub)haplogroups were observed. We propose that our results reflect both the differential distribution of Native American populations that contributed to the present-day criollo mtDNA gene pool and a preferential input of immigrants of Chilean origin to San Juan.criollo mtDNA gene pool and a preferential input of immigrants of Chilean origin to San Juan.