It is not completely clear at this point how the observed
signals of selection originated. The within-taurine
and within-zebu FST complement the taurine-zebu contrast
analysis providing hints on the breed driving each
signal. From the autossomal regions previously described
as candidate regions under positive selection, around
half of them overlap to signals of one or more breeds in
the within-taurine analysis (10 out of 19), which is consistent
with one’s expectation, since the majority of previous
work was done using mostly taurine breeds, and in
a few cases also composite cattle. There was only one region
previously described as a candidate for balancing
selection, in BTA23, and this also overlaps with withinbreed
type signals. A number of peaks were characterized
with more than one breed specific peak in the
within-breed analyses, supporting a commonality of selective
pressure in at least a few regions in some breeds.
However, not all observed signals from the comparison
taurine-zebu could be attributed to a specific breed (s),
and these suggest that they represent a deeper degree of
separation and, possibly, adaptation between cattle types
It is not completely clear at this point how the observedsignals of selection originated. The within-taurineand within-zebu FST complement the taurine-zebu contrastanalysis providing hints on the breed driving eachsignal. From the autossomal regions previously describedas candidate regions under positive selection, aroundhalf of them overlap to signals of one or more breeds inthe within-taurine analysis (10 out of 19), which is consistentwith one’s expectation, since the majority of previouswork was done using mostly taurine breeds, and ina few cases also composite cattle. There was only one regionpreviously described as a candidate for balancingselection, in BTA23, and this also overlaps with withinbreedtype signals. A number of peaks were characterizedwith more than one breed specific peak in thewithin-breed analyses, supporting a commonality of selectivepressure in at least a few regions in some breeds.However, not all observed signals from the comparisontaurine-zebu could be attributed to a specific breed (s),and these suggest that they represent a deeper degree ofseparation and, possibly, adaptation between cattle types
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