Growth performance, meat quality traits, and genetic mapping of quantitative trait loci in 3 generations of Japanese quail populations (Coturnix japonica)

• DOI: 10.3382/ps.2014-03920
• Publication Date: 2014-06-16T21:54:39Z
• Authors: S. Tavaniello; G. Maiorano; M. Siwek; S. Knaga; A. Witkowski; D. Di Memmo; M. Bednarczyk
• Keywords: Coturnix japonica; Coturnix coturnix; Coturnix; Sexual dimorphism; Abdominal fat

The current research was conducted to compare growth, carcass traits, pH, intramuscular collagen (IMC) properties, and genetic bases of IMC carcasses (breast-muscle weight) different lines generations adult males females Japanese quail (Coturnix japonica). Forty-four quails (generation F0), 22 Pharaoh (F-33) meat-type Standard (S-22) laying-type females, were crossed produce the F1 hybrids generation. F2 generation created by mating one male with female, full siblings. birds, randomly chosen from F0 (22 females), (84 152 females) raised 20 wk age in collective cages. Quails fed ad libitum commercial diets. At slaughter, all birds individually weighed (after a fasting period 12 h) dressing yield (without giblets) calculated. then dissected. Genomic DNA extracted blood, 30 microsatellite markers located on 2 chromosomes genotyped. F- 33 had higher vivo postmortem performances abdominal fat percentage than those egg line. Meat S- slower maturation (hydroxylysylpyridinoline crosslink/collagen) ultimate pH. showed an evident sexual dimorphism, additional effect could be due hybrid heterosis F2. lower amount degree compared parental lines. Two statistically significant QTL have been detected chromosome (CJA02): additive (0.50) for marker bracket GUJ0037 GUJ0093; second (1.32) dominant (1.91) effects breast-muscle weight GUJ0084 GUJ0073. To our knowledge, this is first report associated poultry species, respectively.