Clustering and principal component analysis of weight and body size for 28-day-old Tarim pigeon and white Carnean pigeon

WANG Ling; WU Ying-ping; LI Hai-ying; LIU Jia-jia; ZHAO Xiao-yu; YAO Ying-ying; MAIMAITIJIANG Aikeremu

doi:10.13557/j.cnki.issn1002-2813.2023.16.011

Abstract：The purpose of the experiment was to study the correlation between body weight and body size traits of Tarim pigeon and white Carnean pigeons,to provide data support for the selection of phenotypic traits of Tarim pigeon and white Carnean pigeons.A total of 60 Tarim pigeons and 60 white Carnean pigeons(half in male and female)were selected to determine their body weight and body size traits,and the principal component analysis and clustering analysis were carried out.The results of correlation analysis showed that the coefficient of variation of body weight and body size of Tarim pigeon and white Carnean pigeon were both below 10%.The body weight of Tarim pigeons had extremely positive correlations with six body size indexes(P＜0.01),and the body weight of white Carnean pigeons had extremely positive correlations with five body size indexes(P＜0.01).The results of principal component analysis showed that the weight and six body size indexes of Tarim pigeon and white Carnean pigeon could be integrated into three principal component indexes,and the cumulative contribution rate was 78.301%and 79.371%,respectively.The largest contribution rates of the three principal components of Tarim pigeon were body weight,shin circumference and chest width.Among the three principal components of white Carnean pigeon,the largest contribution index were keel length,tibia circumference and chest width.The results of cluster analysis showed that body weight and body size could be grouped into three categories:Body weight,chest width and shin circumference,which were consistent with the results of principal component analysis.The study indicates that the selection of weight and body size traits of Tarim pigeon and white Carnean pigeon should at least include four indicators:Weight,shin circumference,chest width and keel length.