Regression between body weight of lambs from birth to weaning in various strains of sheep Pramenka

Abstract

The result of the multiple regression coefficient (R) have the following values: 0.582 in the Pirot race, 0.499 in the Svrljiska race, 0.610 in the Sjenica race and 0.580 in the Sharplanina race. The coefficient of multiple determination (R2) had the following values: 0.339 in Pirot, 0.249 in Svrljiska, 0.372 in Sjenica and 0.337 in Sharplanina sheep. It follows from this that according to the order of genotypes shown, 33.9%; 24.4%; 36.8%; and 33.2% of the variance of the body weight of lambs at 90 days, determined by the variance of the set of the following variables: PI, SV, SJ, SP- at 60, 30 and 1 day. The adjusted coefficient of multiple determination (Adjusted R2) had the following values: 0.335 in Pirot, 0.244 in Svrljiska, 0.368 in Sjenica and 0.332 in young Sharplanina sheep. From this it follows that according to the order of genotypes shown, 33.5%; 24.4%; 36.8% and 33.2% of the variance of the body weight of lambs at 90 days, determined by the variance of a set of predictor variables: PI, SV, SJ, SP- at 60, 30 and 1 day.