American Criollo pigs are thought to descend mainly from those imported from the Iberian Peninsula starting in the late 15th century. Criollo pigs subsequently expanded throughout the Americas, adapting to very diverse environments, and possibly receiving influences from other origins. With the intensification of agriculture in the mid-20th century, cosmopolitan breeds largely replaced Criollo pigs, and the few...
Em Portugal a produção de caprinos está normalmente associada a zonas pobres e a recursos agrossilvopastoris dificilmente aproveitáveis por outras espécies. O efetivo caprino é atualmente constituído por cerca de 340 mil fêmeas reprodutoras, 1/8 das quais representadas pelas raças autóctones Algarvia, Bravia, Charnequeira, Preta de Montesinho, Serpentina e Serrana. A origem e evolução dos efetivos caprinos port...
Population structure and genetic diversity in the Portuguese native breeds of pigs Alentejano (AL), Bísaro (BI), and Malhado de Alcobaça (MA) and the exotic breeds Duroc (DU), Landrace (LR), Large White (LW), and Pietrain were analyzed by typing 22 microsatellite markers in 249 individuals. In general, the markers used were greatly polymorphic, with mean total and effective number of alleles per locus of 10.68 ...