Morphometric features related to milk ability in dromedaries of Iran central desert and Pakistan

Using efficient mathematical methods can be effective in order to breed identification and genetic grouping. So, the aim of this study was to compare the morphological features of native camels of central desert of Iran with dairy camels of Pakistan using the principal component analysis method. For this purpose, 25 native camels of Iran and 62 dairy camels of Pakistan were used. Measurements of shoulder height, pin width, udder circumference and udder depth were considered. Principal component analysis (PCA) carried out using ggfortify package in R version 3.5.3. Also, scores of camel type were compared using the independent samples t-test in SPSS software (version 22). The results showed that Pakistan’s dairy camels was taller than native camels (p <0.05). Pin width, udder depth, and udder circumference in Pakistan’s camels were larger than native Iranian camels (p <0.05). The mean evaluation score of Iranian native camels was 57.12 ± 10.03 and in camels of Pakistani origin was 76.71 ± 12.31 (p <0.05). The results of PCA showed that native camels of the central desert of Iran and dairy camels of Pakistan are in two separate categories and have different morphologies. The results of the present study showed that it is possible to use mathematical methods including principal component analysis (PCA) in order to accurately distinguish Iranian native camels from dairy camels of Pakistan origin.