Scientific Reports 6: Article number: 21111; published online: 17 February 2016; updated: 20 May 2016.

In this Article, there is an error in the Introduction section.

“Globally, there are only a small number of polycerate native sheep breeds, including Jacob, Manx Loaghtan, Hebridean, Navajo-Churro, Icelandic sheep, Because nowadays there are no four-horned Finnish Landrace sheep. Altay sheep and Chinese Sishui Fur sheep (see Fig. 1)”.

should read:

“Globally, there are only a small number of polycerate native sheep breeds, including Jacob, Manx Loaghtan, Hebridean, Navajo-Churro, Icelandic sheep, Altay sheep and Chinese Sishui Fur sheep (see Fig. 1)”.