Tue, Mar 28, 2017 | updated 05:32 PM IST

Here's why horse-ride is quite comfortable

Updated: Aug 09, 2016 11:11 IST

Washington D.C., Aug. 9 (ANI): You just cannot ignore the contribution of a horse to the human civilization as it has a prized ability to make the riders feel comfortable, with a smooth, four-beat rhythm.

Earlier, studies traced that easy gait to a single typo in a gene involved in coordinated limb movement.

Now, the researchers who have genetically examined historic horse remains said that gaitedness in horses made its first appearance in Medieval England around 850 AD and rapidly spread from there.

"We detected the origin of ambling horses in medieval England," says Arne Ludwig of the Leibniz Institute for Zoo and Wildlife Research in Berlin, Germany.

"Vikings took these horses and brought them to Iceland and bred them there. Later, ambling horses were distributed from England or Iceland all around the world," he added.

Ancient DNA offers a window into the past.

In the new study, the researchers assembled DNA samples, including 90 horses going back to pre-domestic times, before 3500 BC, through to the Middle Ages. They examined the DNA in search of that earlier identified 'gait keeper' variant in a gene known as DMRT3.

The researchers detected the tell-tale genetic change in two English horses from 850 to 900 AD and in ten out of 13 individuals from Iceland dating to the ninth to eleventh century. The gait keeper variant was absent in all of the horse remains from mainland Europe.

"Considering the high frequency of the ambling allele in early Icelandic horses, we believe that Norse settlers selected for this comfortable mode of horse riding soon after arrival," the researchers wrote.

"The absence of the allele in samples from continental Europe (including Scandinavia) at this time implies that ambling horses may have spread from Iceland and maybe also the British Isles across the continent at a later date," they added.

Ludwig further said that they were a bit surprised that the gait keeper variant did not arise sooner, mainly because the trait now occurs so widely in horses all around the world.

But, he noted, with strong selection in the course of breeding domesticated animals, "everything can happen very fast."

However, there are still many open questions about how human preferences changed over time and how those shifts influenced horses.

The study has been published in Current Biology. (ANI)

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