Quantifying genetic (co)variation and effects of genetic selection on tibial bone morphology and quality in 37 lines of broiler, layer and traditional chickens

• Published in: British poultry science 2009-07, Vol.50 (4), p.443-450
• Main Authors: Hocking, P.M, Sandercock, D.A, Wilson, S, Fleming, R.H
• Format: Article
• Language: English
• Subjects: Aging; animal age; animal breeding; Animals; artificial selection; Biomechanical Phenomena; Bone Diseases - genetics; Bone Diseases - veterinary; bone formation; bone strength; broiler chickens; chickens; Chickens - anatomy & histology; Chickens - genetics; Chickens - physiology; Female; Genetic Predisposition to Disease; Genetic Variation; genotype; laying hens; length; Male; Phenotype; phenotypic variation; Poultry Diseases - genetics; selection criteria; Selection, Genetic; shape; Species Specificity; tibia; Tibia - anatomy & histology; Tibia - physiology; weight; width
• ISSN: 0007-1668; 1466-1799
• DOI: 10.1080/00071660903110927

1. Tibial bone morphology and quality was assessed at 6, 8 and 10 weeks of age in 12 broiler, 12 layer and 13 traditional lines of chickens. 2. High intraclass correlations (0·65-0·96) were estimated for tibial weight, length, width, strength, stiffness, stress radiodensity, plateau angle but not for cortical width and tibial torsion at 6 and 10 weeks of age and for weight, length, width, strength radiodensity and plateau angle at 8 weeks of age. Lower intraclass correlations (0·4-0·8) were estimated within category (broiler, layer and traditional) for weight, length, width at 6, 8 and 10 weeks, and for stiffness, stress and radiodensity at 6 and 10 weeks, and were lower (