Genetic determinism of quality of lamb leather in Lacaune dairy sheep breed
Déterminisme génétique de la qualité du cuir des agneaux en race ovine Lacaune lait
Résumé
Lacaune lamb skins are well known for their high quality and their use in the leather industry and luxury ready-to-wear clothing. In France, for several decades, the quality of this leather has deteriorated, mainly due to two skin defects: pinhole and straw-like bushiness. To explore the genetic determinism of these defects, around 1400 Lacaune lambs, from 72 rams, were phenotyped for the 2 skin defects and 4 wool traits. The pinhole defect showed a high heritability (0.59 ± 0.07) and was highly genetically correlated to the wool predicted core bulk (rg = 0.54 ± 0.08). The straw-like bushiness defect had a lower heritability (0.25 ± 0.06), and was correlated to the mean fiber diameter (rg = 0.41 ± 0.15). A genome wide association study revealed for the pinhole defect one major signal on chromosome 3 close to a cluster of keratin genes, known to play an important role in skin development.
Domaines
Sciences du Vivant [q-bio]
Origine : Fichiers produits par l'(les) auteur(s)