between body weight-selected chicken lines Genetic analysis of metabolic traits in an intercross

Summary of phenotypic data for F 2 intercross fromgeneration 40 between high- and low-weight-selected lines Traits n Weight Fixed Effect Covariate Body weight, gHatch 795 27.8 2.1 Sex14 days 795 75.2 14.9 Sex28 days 795 179.1 56.8 Sex42 days 795 365.5 113.1 Sex56 days 795 621.7 186.9 Sex70 days 795 943.3 262.2 SexBody traits at 70 daysof age, gAbdominal fat 402 5.4 4.1 Sex BW70Shanks 405 42.5 11.9 Sex BW70Breast 201 91.1 28.8 Sex BW70Lungs 405 6.5 2.2 Sex BW70Spleen 401 1.4 0.5Bursa 405 1.9 0.7Summary of phenotypic data for the F 2 intercross from generation 40betweenhigh-andlow-weight-selectedlinesisshown.Valuesaremeans SDfor n chickens at hatch and at 14-70 days of age. Fixed effects and covariatesincluded in the quantitative trait locus (QTL) analyses are also given (7).Breast weight, pectoralis major pectoralis minor; BW70, body weight at 70days of age.GENETIC ANALYSIS OF METABOLIC TRAITS IN CHICKENS 21 Physiol Genomics • VOL 42 • www.physiolgenomics.org on August 27, 2014Downloaded from