关键词: 蛋鸡, 早期生长性状, 40周龄体尺性状, 72周龄屠宰性状, 典型相关分析

Abstract: [Objective] This experiment was conducted to investigate the correlations between early growth traits, body measurement traits at 40th week and slaughtering traits at 72nd week of laying hens. [Methods] We selected 1 186 laying hens of the F₂ resource population that was developed by reciprocal crosses between Dongxiang chickens(DX) and White Leghorn(WL). The correlations between the 3 groups were analyzed by simple correlation analysis and canonical correlation analysis. [Results] The simple correlation analysis showed that a total of 284 pairs of traits were highly significant simple correlation between 25 variates(P<0.01), and most correlation coefficients were below 0.5. The canonical correlation analysis showed that the first canonical correlation coefficients between early growth traits and body measurement traits at 40th week, early growth traits and slaughtering traits at 72nd week, body measurement traits at 40th week and slaughtering traits at 72nd week were 0.726, 0.826 and 0.741(P<0.01), accounting for 96.3%, 96.4% and 86.5% of the total correlation, respectively. The main traits of the canonical correlation coefficients in 3 groups were the weight of 18 weeks, the body weight at first egg, shin-bone girth, body steep length, carcass weight and the weight of feet. [Conclusion] The results indicated that canonical correlation analysis could reflect the correlation between traits of 3 groups than simple correlation analysis more accurately, and benefit for the breeding and selecting of laying hens.

Key words: laying hens, early growth traits, body measurement traits at 40th week, slaughter traits at 72nd week, canonical correlation analysis