Publications by authors named "Catalina Teresa Michieli"
Over the past few decades, there has been a growing demand for genome analysis of ancient human remains. Destructive sampling is increasingly difficult to obtain for ethical reasons, and standard methods of breaking the skull to access the petrous bone or sampling remaining teeth are often forbidden for curatorial reasons. However, most ancient humans carried head lice and their eggs abound in historical hair specimens.
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- All crops were developed from wild plants less than 12,000 years ago, with farmers picking the best traits to make them better for eating and growing.
- * Domesticated plants have lost a lot of their original genetic diversity, making them more vulnerable to diseases and pests, which is a big concern for future food supplies.
- * Research on ancient and modern beans shows that early domestication didn't lose much genetic variety, but modern beans are less diverse than those from long ago, likely due to how farmers have selected specific traits in recent times.
In the 1970s, during excavations at Los Morrillos, San Juan, Argentina, quinoa seeds were found within ancient pumpkin crocks protected from the light and high temperatures, and preserved in the very dry conditions of the region. The radiocarbon dates confirmed the age of these seeds at around 2300 years. Sectioning of some of these seeds showed reddish-brown embryos, different from the white embryos of recently harvested quinoa seeds.
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