Browsing by Author "Ülker, H."

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Beta-Globulin Polymorphism of Karakaş, Lambs in Van Farms
(Scientific and Technical Research Council of Turkey, 1996) Baş, S.; Ülker, H.; Vanli, Y.; Karaca, O.
The frequencies for genes of Tf A, Tf B, Tf D, Tf M, Tf E ve Tf S which were typed by polyacrilamyde gel electrophoresis were 0.219, 0.278. 0.199, 0.241, 0.037 and 0.026, respectively. 4 homozygous (Tf AA. Tf BB, Tf DD ve Tf MM) and 15 heterozygous (Tf AB, Tf AD. Tf AM. Tf AE. TF AS. Tf BD. Tf BM. Tf BE. Tf BS. Tf DE, Tf DS. Tf ME. Tf MS ve Tf ES) were determined in the flocks. The diferrences between emprical and theoretical distributions for beta-globulin phenotypes were highly significant (P<.01 ). Significant departure from Hardy-Weinberg equilibrium was probably due to the facts that the flocks were closed to gene flow.
Controlling Reproduction in Karakaş Ewes in Rural Conditions and Growth Characteristics of Their Lambs
(2005) Gökdal, Ö.; Ülker, H.; Karakuş, F.; Aşkin, Y.
The possibilities of synchronizing lambing and increasing reproduction by using exogenous hormones in Karakaş ewes raised under rural farm conditions and growth characteristics of their lambs were investigated. 112 Karakaş ewes at 2-5 ages were randomly assigned into treatment (n = 45) and control (n = 67) groups during breeding season. The ewes in treatment group were placed with 60 mg Medroxyprogesterone acetate (MPA) containing intravaginal passaries for 14 days and received 600 IU PMSG injections at passary withdrawal. Ewes in the control group were not treated and allowed to mate at their natural estrus. Ram introduction for both groups was performed in pasture in village common flock in free mating system. Litter size and twinning rates for treatment and control groups were 1.06 and 1.04; and 6.45 and 4.08 %, respectively, for the first two cycles related to passary withdrawal (P > 0.05). When the expected lambing time was considered, the proportions of the lambed ewes in the first 7 and 10 days were 70.97% and 70.97% for treatment, and 20.41% and 26.53% for control group. The differences in lambing rates in both periods between groups were significant (P < 0.05). Birth weight, 1st, 2nd, 3rd and 4th month live weights, weaning weight and daily live weight gain in treatment group lambs were 3.63 ± 0.13, 9.30 ± 0.41, 16.54 ± 0.50, 23.62 ± 0.77, 31.97 ± 0.66, 31.57 ± 0.92 and 0.221 ± 0.008 kg; and, in control group lambs were 3.26 ± 0.12, 10.11 ± 0.44, 17.80 ± 0.53, 26.30 ± 0.82, 34.59 ± 0.75, 34.42 ± 0.96 and 0.244 ± 0.008 kg, respectively. Except birth weight, treatment group lambs' live weights in all periods were lower than control ones (P < 0.05 and P < 0.01). The results of this study indicate that in order to run studies to control reproduction by using exogenous hormones in rural conditions successfully some precautions and technical support are required. © TÜBİTAK.
The Growth Traits of Karakaş and Its Crosses Lambs (F1) With Ile De France X Akkaraman (G1) Under Unlimited Suckling Regime
(2006) Gökdal, Ö.; Ülker, H.; Karakuş, F.; Cengiz, F.
In this study, the growth traits of Karakaş and (Ile de France × Akkaraman (G1)) × Karakaş crosses (F1) (IDFAK) lambs were investigated. Ewes in the flock were not milked and lambs were subjected to unlimited suckling regime without weaning. Least squares means of weights of IDFAK and Karakaş lambs at birth and 1-6th months were 4.67 and 4.08 kg (p<0.01), 9.16 and 9.49 kg, 14.87 and 15.44 kg, 22.31 and 24.12 kg, 30.84 and 32.51 kg, 35.34 and 33.79 kg, 39.51 and 35.99 kg, respectively. Least squares means of daily live weight gains of IDFAK and Karakaş lambs from birth to 1., 2., 3., 4., 5. and 6th months of age and between 3-6th months were 0.159 and 0.170 kg, 0.174 and 0.184 kg, 0.198 and 0.219 kg, 0.221 and 0.235 kg, 0.207 and 0.197 kg, 0.196 and 0.177 kg, 0.202 and 0.172 kg, respectively. The survival rates of IDFAK and Karakaş lambs until 60th day were 95.94% and 89.79%, respectively (p<0.05). It seems that (Ile de France × Akkaraman (G1)) × Karakaş crosses (F1) lambs reached to marketing age more short time than Karakaş lambs. It could be concluded that Ile de France x Akkaraman (G1) genotype is useful in improving lamb production in Karakaş sheep and desired growth could be obtained especially for cross lambs during 5th and 6th month age. © 2006 Asian Network for Scientific Information.