Effect of genotype, sire, sex, gestation length on birth weight of lambs
2013
Caro-Petrović, V. (Institute for Animal Husbandry, Belgrade-Zemun (Serbia)) | Petrović, P. M. (Institute for Animal Husbandry, Belgrade-Zemun (Serbia)) | Ilić, Z. (Faculty of Agronomy, Priština-Lešak (Serbia)) | Petrović, M.M. (Institute for Animal Husbandry, Belgrade-Zemun (Serbia)) | Miloševć, B. (Faculty of Agronomy, Priština-Lešak (Serbia)) | Ružić-Muslić, D. (Institute for Animal Husbandry, Belgrade-Zemun (Serbia)) | Maksimović, Nevena (Institute of Animal Husbandry, Belgrade-Zemun (Serbia))
The birth weight of lambs has an essential role in satisfying sheep production. Also reflected as primary factor later development of young organism. In the study included: gestation length, sire (two sires in each genotype during parenting), sex of lambs at birth, the birth weight of single lambs from well nourished mature ewes of the next genotypes: Miss (1), Wurttemberg (2) and Ile de France (3). The highest birth weight was obtained in genotype 3 with an average birth weight of 4.63 kg in sire 2 and 4.44 kg in sire 1 with a difference of 0.19 kg. Gestation length of genotype 1 ranged from 144 to 153 days; genotype 2, from 148 to 154 days and the genotype 3, from 144 to 151days. The highest average birth weight in genotype 1 with gestation length of 153 days weighed 5.10 kg. Average birth weights of male lambs in all genotypes were higher than the females. There were a very significant effect of genotype, sire, gestation length on birth weight of lambs (P<0.01), but sex have no significant effect on birth weight of lambs (0.065;P>0.05). The result achieved therefore can be explained that the effect of genotype, sire and gestation length and the interaction between subjects effects such as the next: Sire*Gestation length; Sire*Sex; Gestation length*Sex; Sire*Gestation length*Sex were highly and significantly affected the birth weight of lambs (P<0.01; P<0.05). The interactions between subjects’ effects will be a good indicator to be acquainted more on their influence in a certain trait.
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