Correlation and regression analysis of body weight, wool and blood traits for Awassi and Naimy and their crosses

Abstract

This study was conducted at Khairat Al-Ittihad station in Al-Shumali district / Babil Governorate from period 7/20/2023 until 4/1/2024, to study birth weights and wool traits of ewes in local sheep by (20) Awassi and (20) Naimiya, in addition to (20)  Awassi  crossir  Naimi. The study aimed to compare three breeds of local sheep for the  traits of the dams weight at birth, the weight of the newborn, the body weight, and body dimensions, in addition to studying the  traits of the wool, the weight of the raw and clean fleece, the length of the tuft, the length of the fiber, the number of folds, and the softness fiber. , tensile strength, elongation, fiber diameter and oil ratio , with a study of  blood  compound represented by total protein, glucose, cholesterol, glucose, triglycerides and Creatine , as well as a study of correlation and regression for the studied  traits. A highly positive correlation was found between the clean fleece weight and each of the after weight, 0.922, the rumps height, 0.603, and the forefoot height, 0.679, while a highly significant, negative correlation was found between the clean fleece weight and each of the chest circumference,- 0.389 and the abdominal circumference, 0.599 - and the body mass index, 0.600 - and a positive significant correlation with... Body length 0.318. There is also a highly significant, positive correlation between hair length and chest circumference, 0.312, and a highly significant, negative correlation between fiber length and postpartum weight, 0.381 - and significant with chest circumference, 0.255. As for the correlation between body length and total protein, it was highly significant, positive, 0.538, significant with triglycerides, 0.262, and a negative significant correlation. Between the height and the triglycerides is -0.293. The study showed that there was a significant regression for body weight on body length by 0.227 kg/cm, and a highly significant regression for body weight on Body height by 0.574 kg, chest circumference 0.574 kg/cm, front height 0.225 kg/cm, and abdominal circumference 0.697. kg/cm. There was a highly significant regression of the clean fleece weight on both the raw fleece weight of 1.089 kg and the tensile strength of 0.181. There was a significant regression in the weight of clean fleece on triglycerides by 6.629. We note from the coefficient of determination that it ranges between the highest value of 0.800 in raw weight and the lowest value of 0.010 in Creatinene .