Determination of Relationship between Some Udder and Body Traits of Holstein Cows by Canonical Correlation Analysis

Abstract

The purpose of the research was to obtain the relationship between some udder and body traits. In an attempt to perform the study, canonical correlations among height at withers (HW), shinbone perimeter (SP), body length (BL), chest girth (CG), stature (S), rump width (RW), rear udder height (RUH), right fore udder teat perimeter (RFUTP), right rear udder teat perimeter (RRUTP),left fore udder teat perimeter (LFUTP), left rear udder teat perimeter (LRUTP), fore udder teat length (FUTL), and rear udder teat length (RUTL) in 50 head Holstein cows that were raised at a dairy farm in Bozdogan province in Aydin county, were estimated. Six body traits constituted the X variable set while seven udder traits constituted the Y variable set. As a result, the correlation between the first canonical variable pair was found 0.62 (P˃ 0.05). The contribution occurrences of canonical variables of HW and BL from body traits and LRUTP and RRUTP from udder traits were found the highest than others. According to these results, the degrees of explanation (redundancy) of change on each other of the two variable sets (U1 and V1) were found 6.2 % and 2.1 %, respectively.