Abstract:
Twenty nine Nubian does were considered for estrus synchronization, and
devided into 3 groups: G1 (n=9) treated with 50 IU of Oxytocin, G2 (n=10)
treated with 100 IU oxytocin and G3 (n=10) as control group. Synchronies
obtained were, G1 (50i.u-OT) 75%, G2 (100i.u-OT) %50% and G3 (Control)
40%. There were no significant difference, (P >0.05), in estrus synchronies
between the three groups under 50 and 100 IU oxytocin doses treatments
against the non-treated control group.
In determining the effect of genetic differences on estrus synchronization with
the PGF2α injections, two groups of Nubian (n=29) and Nilotic (n=19) does
were considered. The synchronies percentages obtained were, the Nubian
breed, 96.55% and the Nilotic breed, 78.95%. There were no significant
difference, (P >0.05), of the breed on estrus synchronization using (PGF2α)
injections.
In determining the effect of exogenous oxytocin on estrus synchronization in
Nilotic does of Sudan, 16 does were considered for this experiment. They
were devided into two equal groups, Ga, treated (50 IU.OT), and Gb,
(Control).The percentages of synchronies obtained were, 75% for Ga, and
50% for Gb.There were no significant difference, (P>0.05),in estrus
synchronies between the two groups under 50 IU oxytocin treatment against
the non-treated control group.
For determining conception rates, four groups of Nubian does, Ga (n=7)
treated with 50 IU of oxytocin, with single insemination, Gb (n=7) treated
with 50 IU, with double inseminations, Gc1 (n=7) control group with single
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insemination, Gc2 (n=7), control group with double inseminations were
considered. They were artificially inseminated with Saanen fresh semen after
estrus synchronization with PGF2α. the percentages of pregnancies
considered were, Ga(50i.u.OT),1 AI,28.6 %, Gb (100 i.u.OT), 2 AIs, 14.3 %,
Gc1 (Control), 1 AI, 28.6 % and Gc2 (Control), 2 AIs, 57.1 %.
There were no significant difference, (P >0.05), in numbers of pregnancies
obtained under oxytocin treatements against the non-treated, or with the two
inseminations against single insemination.
In an other experiment, two groups of Nilotic does, Ga (n=7) treated with 50
IU oxytocin and Gb (n=8) was the control group were considered for
detecting the effect of exogenous oxytocin hormone on conception rate in
Nilotic does. They were inseminated once after estrus synchronization by
PGF2α. The percentages of pregnancies obtained were, 71.43% for Ga (50
IU.OT) and 75% for Gb, (Control group). There were no significant
difference, (P >0.05), in pregnancies happened under oxytocin treated group
against the non-treated one.
Statistical analysis method used was χ².
