Crossbreeding and the effect of certain environmental factors on body weight of Barki and German Merino sheep

E.K.uni, M.H.; Karam, H.A.; Galal, E.S.E.; Afifi, E.A.

Journal of Agricultural Science, UK 82(2): 349-352


Accession: 000053528

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Body weight at birth, weaning and 1 and 2 yr of age was studied in 710 lambs born between 1956 and 1967, and representing Barkis, German Mutton, Merinos, (GMM) their GMM X Barki F1s and backcrosses. Body weights of the lambs of the 2 crossbred groups were intermediate between those of the 2 purebreds at birth, and exceeded them at weaning. The GMM lambs were 0.61 kg heavier than the Barki lambs at birth and maintained that advantage throughout the study. Age of dam, type of birth, sex, and year of birth were significant sources of variation in the weights studied. The effects of age of dam and type of birth declined after weaning, while that of sex increased.