organism: Sus scrofa
description: The sequenced pig was a sow from the Iberian strain Guadyerbas. This is an obese, black, hairless and early-maturing Iberian strain. It represents one of the most ancient surviving Iberian lines, with no evidence of introgression of Asian genes that has remained isolated since 1945 in a closed herd, El Dehes*n del Encinar, located in Toledo, central Spain  (Toro et al, 2000). A relevant aspect is that the complete pedigree since the founding of the herd is known, including that of the individual sequenced. Furthermore it has been used in several QTL experiments, including F2 crosses with Landrace  (P*rez-Enciso et al, 2000) and Meishan  (Noguera et al, 2009)