|SREL Reprint #0653|
Genetic Variability and Domestication in Swine
W. Smith, Michael H. Smith, and I. Lehr Brisbin, Jr.
Electrophoretic variability at 15 to 20 loci was
compared between four populations of swine.
Even though these populations had radically different histories, the same
common alleles were observed at all loci examined.
The swine (n=207) were polymorphic at 6 to 25% of their loci and had an
average heterozygosity of 0.034, which is near the mean for mammals.
Feral swine from the Savannah River Plant (SRP) showed significant
temporal changes in allele frequencies between years but showed levels of
genetic variability similar to that of domestic swine from areas peripheral to
the SRP. The domestic and feral
swine from on or near the SRP did not share a common gene pool.
The population of feral swine from Ossabaw Island, Georgia, and the
population of swine from the Great Smoky Mountains National Park showed lower
variability than those from South Carolina.
The hypothesis that hybridization and a consequential increase in genetic
variability has played an important role in domestication is not supported by
SREL Reprint #0653
Smith, M.W., M.H. Smith, and I.L. Brisbin Jr. 1980.
Genetic variability and domestication in swine. Journal of