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Studies of genetic diversity in domestic animals are based on an evaluation of the genetic variation within breeds and genetic relationship among them. Combining this genetic population with phenotypic and aetiological data would enable formulation of the most informed recommendation for gene resource management.

Five Y-chromosome microsatellite markers from seven north Ethiopian cattle populations is analysed to assess the paternal gene pool and to explore the mechanisms behind the genetic structure. It is found that there is common but limited strong male-mediated gene flow among paternal origin of the north Ethiopian cattle populations.

A genetic marker map of Atlantic salmon would facilitate the identification of loci influencing economically important traits. In the present paper we describe five new Atlantic salmon microsatellites. Segregation studies and linkage analysis of these and previously published microsatellites were carried out in pedigrees consisting of diploid dams and haploid gynogenetic offspring. We confirm earlier reports that salmon microsatellites tend to have a higher number of repeat units than those of mammals. Linkage analysis revealed that three microsatellites belong to a linkage group spanning approximately 50 cM of the genome, whereas the remaining 10 markers seem to be unlinked.