The combinations of genetic markers (allotypes, blood-group systems, and po
lymorphic proteins) were analyzed in pigs of two phylogenetically related S
iberian populations: the newly selected Siberian specialized meat breed SM-
1 (daughter breed) and the reproductive core of the Kemerovo breed (materna
l breed). Statistically significant interlocus associations were found betw
een the genetic markers that are known not to be linked, being assigned to
different linkage groups, and the main selected meat-productivity traits. S
ome of these associations were shared by both breeds; others were found to
be specific to either maternal or daughter populations. Possible genetic me
chanisms underlying these associations and their significance are discussed
.