The disagreement in results with previous studies can be due to variation in song repertoire learning programmes between the studied populations or by differences in methodological approaches between the studies.
Due to the topographic isolation of our study area, it seems reasonable to assert that viral exchange between the studied populations is primarily responsible for the reintroduction of the virus into populations where it has become extinct.
In order to examine the extent and likely impact of MAF differences between the studied populations in general, we next examined LD structure, undertook PCA, and calculated fixation indexes Fst and inflations factor λ (see below).
In addition, linkage patterns and allele frequencies in MDR1 are highly variable between different ethnic groups and thus between the studied populations [ 22].
Along with this finding, one may argue that many of the fixed mutations have limited potential function which simply reflects the time of divergence between the studied populations.
Other possible reasons for the difference in outcome between studies could be that different breeds have been studied and/or there was different breeding management between the studied populations.
Unexpectedly, the data show a positive correlation between the three studied populations and the Manchu, which is a northern minority population.
