High prevalence of HBV/A1 subgenotype in native south Americans may be explained by recent economic developments in the Amazon.
Infection, Genetics and Evolution 43:354 (2016)
Population Genetic Structure of the Magnificent Frigatebird Fregata magnificens (Aves, Suliformes) Breeding Colonies in the Western Atlantic Ocean.
PLoS ONE 11(2):e0149834 (2016)
The Magnificent Frigatebird Fregata magnificens has a pantropical distribution, nesting on islands along the Atlantic and Pacific coasts. In the Caribbean, there is little genetic structure among colonies; however, the genetic structure among the colonies off Brazil and its relationship with tho...
So far away, yet so close: strong genetic structure in Homonota uruguayensis (Squamata, Phyllodactylidae), a species with restricted geographic distribution in the Brazilian and Uruguayan Pampas.
PLoS ONE 10(2):e0118162 (2015)
The Pampas is a biologically rich South American biome, but is poorly represented in phylogeographic studies. While the Pleistocene glacial cycles may have affected the evolutionary history of species distributed in forested biomes, little is known about their effects on the habitats that remain...
Were sea level changes during the Pleistocene in the South Atlantic Coastal Plain a driver of speciation in Petunia (Solanaceae)?
BMC Evolutionary Biology 15:92 (2015)
Quaternary climatic changes led to variations in sea level and these variations played a significant role in the generation of marine terrace deposits in the South Atlantic Coastal Plain. The main consequence of the increase in sea level was local extinction or population displacement, such that...
Diversification in the South American Pampas: the genetic and morphological variation of the widespread Petunia axillaris complex (Solanaceae).
Molecular Ecology 23(2):374 (2014)
Understanding the spatiotemporal distribution of genetic variation and the ways in which this distribution is connected to the ecological context of natural populations is fundamental for understanding the nature and mode of intraspecific and, ultimately, interspecific differentiation. The Petun...
Bayesian inferences suggest that Amazon Yunga Natives diverged from Andeans less than 5000 ybp: implications for South American prehistory.
BMC Evolutionary Biology 14:174 (2014)
Archaeology reports millenary cultural contacts between Peruvian Coast-Andes and the Amazon Yunga, a rainforest transitional region between Andes and Lower Amazonia. To clarify the relationships between cultural and biological evolution of these populations, in particular between Amazon Yungas a...
Twin Town in South Brazil: a Nazi's experiment or a genetic founder effect?
PLoS ONE 6(6):e20328 (2011)
Cândido Godói (CG) is a small municipality in South Brazil with approximately 6,000 inhabitants. It is known as the "Twins' Town" due to its high rate of twin births. Recently it was claimed that such high frequency of twinning would be connected to experiments performed by the German Nazi docto...
Polymorphisms of the UCP2 gene are associated with proliferative diabetic retinopathy in patients with diabetes mellitus.
Clinical Endocrinology 72(5):612 (2010)
Uncoupling protein 2 (UCP2) plays a role in controlling reactive oxygen species (ROS) production by mitochondria. As ROS overproduction is related to diabetic retinopathy (DR), UCP2 gene polymorphisms might be involved in the development of this complication. We investigated whether the -866G/A ...
The use and limits of ITS data in the analysis of intraspecific variation in Passiflora L. (Passifloraceae).
Genetics and Molecular Biology 33(1):99 (2010)
The discovery and characterization of informative intraspecific genetic markers is fundamental for evolutionary and conservation genetics studies. Here, we used nuclear ribosomal ITS sequences to access intraspecific genetic diversity in 23 species of the genus Passiflora L. Some degree of varia...
Mitochondrial population genomics supports a single pre-Clovis origin with a coastal route for the peopling of the Americas.
The American Journal of Human Genetics 82(3):583 (2008)
It is well accepted that the Americas were the last continents reached by modern humans, most likely through Beringia. However, the precise time and mode of the colonization of the New World remain hotly disputed issues. Native American populations exhibit almost exclusively five mitochondrial D...
A reevaluation of the Native American mtDNA genome diversity and its bearing on the models of early colonization of Beringia.
PLoS ONE 3(9):e3157 (2008)
The Americas were the last continents to be populated by humans, and their colonization represents a very interesting chapter in our species' evolution in which important issues are still contentious or largely unknown. One difficult topic concerns the details of the early peopling of Beringia, ...
Statistical evaluation of alternative models of human evolution.
PNAS 104(45):17614 (2007)
An appropriate model of recent human evolution is not only important to understand our own history, but it is necessary to disentangle the effects of demography and selection on genome diversity. Although most genetic data support the view that our species originated recently in Africa, it is st...
Alu insertion polymorphisms in Native Americans and related Asian populations.
Annals of Human Biology 33(2):142 (2006)
Alu insertions provide useful markers for the study of inter-population affinities and historical processes, but data on these systems are not numerous in Native Americans and related populations.
The study aimed to answer the following questions: (a) do the population relationships found agree ...
Genetic, geographic, and linguistic variation among South American Indians: possible sex influence.
American Journal of Physical Anthropology 117(1):68 (2002)
To better understand the relationship between genetic variability, geographical distance, and linguistic affiliation in South Amerinds, and to elucidate whether the migration rate is the same for both sexes, spatial autocorrelation, Mantel's test, and F(ST) analyses were performed in four sets o...