Friday, May 13, 2016

CAMEL,GENES AND CLIMATE CHANGE.

The findings published in the Proceedings of the National Academy of Sciences shows that the dromedary camel has their genetic diversity shaped by ancient trade routes. Scientists examined DNA samples from more than 1,000 one-humped camels. Despite populations being hundreds of miles apart, they were genetically very similar.Scientists explained that centuries of cross-continental trade had led to this "blurring" of genetics. One of the team, Prof Olivier Hanotte, from Nottingham University, explained that what made the dromedary so biologically fascinating was its close link to human history. They have moved with people, through trading So analyzing dromedaries, can help find a signature of our own past. In search of this signature, the researchers compared samples of DNA - the carrier of genetic information - from populations across the camels' range. Our international collaboration meant we were able to get samples from West Africa, Pakistan, Oman and even Syria. The domesticated dromedary was adopted as a beast of burden around 3,000 years ago and, well into the 20th Century, trade caravans that sometimes consisted of thousands of animals, would transport goods across the deserts of North Africa and the Arabian Peninsula. Prof Hanotte explained: "People would travel hundreds of miles with their camels carrying all their precious goods. And when they reached the Mediterranean, the animals would be exhausted. "So they would leave those animals to recover and take new animals for their return journey." This caused centuries of genetic "shuffling", making dromedaries that are separated by entire continents remarkably similar. Crucially, this has also ensured that the animals maintained their genetic diversity - constantly mixing up the population. This means that dromedaries are likely to be much more adaptable in the face of a changing environment. Climate change, is characterized by rising temperatures, more extreme weather patterns and more areas becoming less suitable for livestock, .The dromedary will be our better option for livestock production - of meat and milk. These could replace cattle and even sheep and goats that are less well-adapted. read more from BBC NEWS.

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