快慢羽系德化黑鸡生长性状与体尺性状的关联性分析OA

To study the correlation between growth traits and body type traits in rapid and slow feathering Dehua black chickens,120 one-day-old chicks from each feathering type were randomly selected,with equal numbers of males and females.Their body weight,comb height,and body type indicators were measured at 42 days and 125 days of age.The results showed that the body weight of rapid feathering male chickens at 42 days was significantly higher than that of slow feathering males(P<0.05),while at 125 days,the body weight of slow feathering males showed a trend of being higher than that of rapid feathering males(P>0.05).Rapid feathering fe-male chickens also had a dramatically higher body weight at 42 days compared to slow feathering females(P<0.05),but at 125 days,slow feathering females had significantly higher body weight,comb height,and shank circumference compared to rapid feathering fe-males(P<0.05).Additionally,there was a remarkable positive correlation between body weight and comb height in both feathering types at different ages(P<0.05),and notable positive correlations were found among the body type traits.These results indicate that feathering genes affect the growth traits of Dehua black chickens,with the slow feathering gene being beneficial for later growth and development.Moreover,genetic selection based on body weight and body type indicators may yield positive outcomes.