The new study shows that populations geographically close to former slave trade routes and ports have more African ancestry than more inland Latin Americans, who show more Native American heritage.
The terms Hispanic and Latino “encompasses a huge amount of genetic diversity,” says Katarzyna Bryc, a graduate student in biological statistics and computational biology and co-lead author of the study with New York University medical student Christopher Velez. “The study reveals unique patterns of ancestry across these populations.”
“These Latino populations tell us about the complexity of migration events involved in the histories of Hispanics/Latinos,” Bryc says.
The study includes genetic samples from 112 people from Mexico plus 100 individuals from Ecuador, Colombia, the Dominican Republic and Puerto Rico. The analysis shows that individuals from the Dominican Republic, Puerto Rico and Colombia have more African ancestry, reflecting migrations along the historical slave-trade routes. In contrast, Mexicans and Ecuadorians have more Native American ancestry.
Researchers also found that the Native American segments of genomes of North American Latinos – those from Mexico, Puerto Rico and Dominican Republic – are genetically more similar to those of the Nahua people indigenous of Mexico and Central America, while the Native American segments of genomes of South American populations – those from Colombia and Ecuador – were most similar to those of the Quechua people.
The findings also have implications for medicine, where knowledge of ancestries may reveal tendencies toward chronic inherited diseases. For example, previous studies have shown that Latinos with greater European ancestry have a higher risk of breast cancer.
The genetics study by researchers from Cornell, the New York University School of Medicine, the University of Arizona and Stanford University, appears online in the May 5 edition of the peer-reviewed Proceedings of the National Academy of Sciences and can be found online at www.pnas.org. Senior authors include Carlos Bustamante, a former Cornell computational biologist and geneticist now at Stanford's School of Medicine; and Harry Ostrer, director of the Human Genetics Program at New York University. Andres Moreno-Estrada, postdoctoral associate in Bustamante's lab, was also a co-author.
The study was funded by the National Institutes of Health.
Smart Data Transformation – Surfing the Big Wave
02.12.2016 | Fraunhofer-Institut für Angewandte Informationstechnik FIT
Climate change could outpace EPA Lake Champlain protections
18.11.2016 | University of Vermont
In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
06.12.2016 | Materials Sciences
06.12.2016 | Medical Engineering
06.12.2016 | Power and Electrical Engineering