Origin and maintenance of genetic diversity in northern European sheep Distribution of maternal lineages were studied based on mitochondrial control region variation in 76 sheep breeds in northern Europe and in a wide neighbouring area variation was studied in 37 northern European breeds, and autosomal blood protein.
Parasite transmission in a migratory multiple host system More lightly infected but abundant hosts, and those that pass through an area at a certain time, might be signi cant sources of infection and more in uential determinants of parasite persistence and Central Asia, which crosses climatic zones during long.
Prion protein gene polymorphisms in sheep with natural scrapie and These included 38 Dala sheep, originating from four flocks from widely separated geographical regions, mean age 3 0 years (range 1 6... Add t onal Breeds A number of other breeds of sheep are also raised in Montana.