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Chickens to chili peppers
Date:4/17/2014

lants cultivated over many generations that still have features of wild plantsand the presence of animals in association with humans to truly domesticated organisms that exhibit very specific traits like large seeds, bigger flowers, reduction in physical and chemical defenses in plants and altered coat color, floppy ears and baby faces (facial neotony) in animals.

Papers in the special feature cover both older and more recent issues in the study of domestication. New genetic screening techniques and the ability to sequence DNA from ancient specimens led Greger Larson and his group at Durham University (Linus Flink et al.) to caution that using modern genetic data alone to guess which genes may have been involved in domestication origins may be misleading. They compared DNA from 80 chickens excavated from 12 different archaeological sites in Europe dated from 280 BC to the 18th Century to modern chicken DNA. Sequencing revealed that yellow-skinned chickens were probably not common early in the domestication process. Their work suggests that yellow skin became the norm only about 500 years ago, probably as a result of global commerce.

Addressing a long-debated questionwhy hunters and gatherers became farmersGremillion, Barton, and Piperno review theories and explanations for agricultural origins, making the case that evolutionary approaches are essential because they offer coherent, empirically testable reconstructions of human behavior.

The authors of the overview paper (Larson and Piperno et al.) expect more exciting results as researchers from around the world and from many disciplines work together to nail down the environmental and ecological contexts of domestication and the shift from hunting and gathering to cultivation and herding. As they say in the paper abstract: "It is difficult to overstate the cultural and biological impacts that the domestication of plants and animals has had on our species. the next decade will yield even mo
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Contact: Beth King
kingb@si.edu
202-633-4700 x28216
Smithsonian Tropical Research Institute
Source:Eurekalert  

Page: 1 2 3

Related biology news :

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5. Ethylene of no effect - why peppers do not mature after picking
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