 Although it is known that the Sorraia developed in the southern part of the Iberian peninsula , the breed was isolated and unknown to science until the 20th century . Despite the lack of documentation , attempts have been made to reconstruct its history . Paleolithic parietal art images in the region depict equines with a distinct likeness to the Sorraia , with similar zebra @-@ like markings . Analysis of mtDNA has been performed on Mustangs in the western United States that show similar mtDNA patterns between some Mustangs and the Sorraia breed . Spanish conquistadors took Iberian horses , some of whom closely resembled the modern @-@ day Sorraia , to the Americas in their conquests , probably as pack animals . Similarities between the Sorraia and several North and South American breeds are shown in the dun and grullo coloring and various physical characteristics . This evidence suggests that the Sorraia , their ancestors , or other horses with similar features , may have had a long history in the Iberian region and a role in the creation of American breeds . 
 Although it is known that the Sorraia developed in the southern part of the Iberian peninsula , the breed was isolated and unknown to science until the 20th century . Despite the lack of documentation , attempts <a href='been_done' title='1'><mark>have</mark></a> been made to reconstruct its history . Paleolithic parietal art images in the region depict equines with a distinct likeness to the Sorraia , with similar zebra @-@ like markings . Analysis of mtDNA <a href='been_done' title='2'><mark>has</mark></a> been performed on Mustangs in the western United States <a href='null_relcl' title='3'><mark>that</mark></a>show similar mtDNA patterns between some Mustangs and the Sorraia breed . Spanish conquistadors took Iberian horses , some of whom closely resembled the modern @-@ day Sorraia , to the Americas in their conquests , probably as pack animals . Similarities between the Sorraia and several North and South American breeds are shown in the dun and grullo coloring and various physical characteristics . This evidence <a href='uninflect' title='4'><mark>suggests</mark></a> that the Sorraia , their ancestors , or other horses with similar features , may <a href='been_done' title='5'><mark>have</mark></a> had a long history in the Iberian region and a role in the creation of American breeds . 
Although it is known dat the Sorraia developed in the southern part of da Iberian peninsula , tdabreed was isolated and unknown to science until the 20th century . Despite the lack of documentation , attempts done been made to reconstruct its history . Paleolithic parietal art images in the region depict equines with a distinct likeness to thdaorraia , witt similar zebra @-@ like markings . Analysis of mtDNA done been performed on Mustangs in thedastern United States show similar mtDNA patterns between some Mustangs and the daraia breed . Spanish conquistadors took Iberian horses , sum of whom closely resembled the modern @-@ day Sorraia , to the Americas in their conquests , probly as pack animals . Similarities between the Sorraia and several North and South American breeds r shown in the dun and grullo coloring and various physical characteristics . This evidence suggest that the Sdaaia , their ancestors , or other horses with similar features , may done had a long history in the Iberian region and a role in the crdaion of American breeds .