Some non-genetic factors affecting lambs birth weight in F1 generation of Mis x Ile de France

Abstract

The study aim was to know the non-genetic factors and the interaction effect on birth weight of lambs F1 generation crossed Mis x Ile de France. The data of lambs birth weight (in kg), month of birth, year of birth, season of birth, sex, birth type from progeny (F1 generation) of crossing Mis x Ile de France with a total of 388 lambs born during 2018 to 2019 recorded. The General Linear Model (GLM) procedure was used to analyze the data. The analysis of variance has shown that month of birth significantly affects lambs birth weight (P<.005). Results shows a highly significant effect of year on lambs birth weight (P<.001). The highest mean average birth weight of lambs showed on the second year. Regarding of season, lambs had the highest body weight in spring and winter, and the smallest in autumn but despite the differences in weight, season did not show any significant effect on lambs birth weight (P>.005). Sex of lambs showed no significant effect on lambs birth weight (P>.005). The birth type significantly affects birth weight of lambs (P<.001). The highest body weight are have single, then twins, triplets and quadruplets.