Principal component analysis and cluster analysis of body weight and body size traits of Tengchong white chickens
The experiment aimed to investigate the correlation between body weight and measurement traits of Tengchong white chickens,as well as their body shape characteristics.The study utilized correlation analysis,principal component analysis,and cluster analysis to examine the body weight and eight morphological indicators of 30 healthy roosters and hens at 300 days of age.The results showed that the average body weights of the Tengchong white chicken roosters and hens were(2 689.33±308.49)g and(2 016.67±351.44)g,respectively,with the roosters'weight being significantly higher than that of the hens(P＜0.05).Except for the chest angle,all other morphological indicators in roosters were significantly greater than those in hens(P＜0.05).Principal component analysis showed that the nine indicators of Tengchong white chickens could be condensed into three principal components,with cumulative contribution rates of 73.962％for roosters and 74.900％for hens.Among the simplified principal components for both sexes,body weight,body diagonal length,shank circumference,keel length,shank length,hip bone width,and chest width contributed the most to the principal components.Cluster analysis categorized the measured indicators of roosters and hens into four clusters.The study indicates that the body size index of Tengchong white chickens is at a medium level among the major local chicken breeds in Yunnan,with larger skeletal structures and superior meat production capabilities,classifying it as a larger breed.The outcomes of this study can serve as a reference for the further selection and breeding of Tengchong white chickens.
Tengchong white chickenbody weightbody measurement traitprincipal component analysiscluster analysis
国家科技期刊平台
NSTL
万方数据
