Correlation and Regression Analysis of Body Weight and Milk Characteristics of Cypriot and Local Goats

تحليل الارتباط والانحدار لوزن الجسم وانتاج الحليب للماعز القبرصية والمحلية

Abstract

Introduction: The regression coefficient plays an important role in raising and improving goats. It serves as a quantitative measure of the relationship between the age. and weight dam to the birth weights. This study was conducted Females weighing 40-50 kg on 53 Cypriot goats and 30 iraqi goats, aged 2-5 years, at the Livestock Research Station - Abu Ghraib affiliated to the Ministry of Agriculture iraq. Materials and methods: The study aimed to analyze the correlation and regression The age and weight of dam at birth of the productive characteristics (dam birth weight, dam body damensions, birth weight, weaning weight, total weight gain, total milk production, peak production, number of milking days and milk components) and calculae the straight-line equation.Results: The results show that there is a highly significant correlation between the weight of dam at birth with the damensions of the body, newborn’s weight, the peak of production and the number of milking days, and a non-significant correlation of the weight of the newborn with the production of milk and its components, and a highly significant correlation of the peak of production and the number of milking days with of milk components. There was a significant regression posetive of dam birth weight on birth weight in Cypriot 0.018 and local 0.039 and highly significant on milk production in Cypriot 0.054.Conclusion: We conclude that there is a correlation between dam weight at birth with body damensions, newborn weight and milk production, and a regression of dam weight and age on birth weight and milk production in Cypriot and local goats.