Genotype and Environmental Factors Affecting Birth and Postnatal Weights of Prolific Javanese Sheep



Subaudriyo Subaudriyo(1*), I. Inounul(2)

(1) Small Ruminant-CRSP/Central Research Institute for Animal Sciences, P.O. Box 308, Bogor 16003, Indonesia
(2) Small Ruminant-CRSP/Central Research Institute for Animal Sciences, P.O. Box 308, Bogor 16003, Indonesia
(*) Corresponding Author

Abstract


A study to evaluate the effect of genotype of dam (FeeJ*FecJ+; FecJ+FecJ‘;
FecJFFecJ"; FeeJFFecJ‘; and FeeJFFecJF) and environmental factors on birth weight (BW) and postnatal weights at 30 days (W30), at 60 days (W60), at 90 days (W90) and at 120 days (W120) were conducted on Javanese prolific sheep flock from 1991 to I993. Factors affecting birth weight and all postnatal weights were year, sex of lamb and birth type (P<0.0l). Dam age was significant for BW (P<0.05) and W30 (P<0.0l), respectively, and nearly significant for W120 (P<0.l), but not significant for W60 and W90. The dam genotype effect was significant for BW (P<0.00l) and W60
(P<0.05), respectively, but not significant for other weights. Lambs born from dam carrying prolific gene (FecJF) tended to have lower birth weight and postnatal weights.


Keywords


Sheep, Javanese, Prolific, Genotype, Environmental, Postnatal

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