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The aim of the present paper was to investigate the efficiency of different progestagen treatment methods in combination with Pregnant Mare Serum Gonadotrophin (PMSG) in Merino ewes outside the breeding season. A total of 78 ewes (2 to 4 years old) with a mean bodyweight of 58.4 kg and an average body condition score (BCS) of 3.5 were used in the trial. The ewes were randomly divided into 3 equal groups [n= 26]. Intravaginal progestagen sponges containing Fluorogestone Acetate (FGA; 30 mg) were inserted intravaginally for different periods (7_days: short-term; 10_days: mid-term, 14_days: long-term). In all cases, 500 IU PMSG was administered intramuscularly at sponge withdrawal. The oestrus response, lambing rate, multiple birth rate, fecundity and litter size were [65.4, 61.5, 18.8 %, 0.77 and 1.25] in the short-term group; 80.8, 88.5, 34.8 %, 1.31 and 1.48 in the mid-term group; and 96.2, 92.3, 62.5 %, 1.50 and 1.63 in the long-term group, respectively. Oestrus manifestation and multiple birth rate were greater in long-term than in mid-and short-term groups, whereas for lambing rate, fecundity and litter size, better results were obtained in long-and mid-term than in short-term protocol. In conclusion, in Merino ewes, oestrus synchronisation outside the breeding season with long and mid-term progestagen treatment was found to be more effective than short-term treatment.

Bu araştırma, 3-4 yaşlarındaki 115 baş Kıvırcık koyunda, doğum dönemindeki vücut kondisyon skoru (VKS) ve canlı ağırlığın kuzuların doğum ve sütten kesim ağırlığına etkilerini belirlemek için yürütülmüştür. Koyunlarda VKS doğumu takip eden gün içinde, bel bölgesinde omurların üzerindeki ve çevresindeki kas ve yağ birikiminin palpasyonu ile 1-5 aralığında puanlanarak yapılmıştır. Veriler VKS ve canlı ağırlığı içeren bir model ve üretim özelliklerini etkileyen diğer faktörler kullanılarak analiz edilmiştir. Doğum dönemindeki koyunların VKS, canlı ağırlığı, kuzuların doğum ağırlığı, sütten kesim ağırlığı ve günlük canlı ağırlık artışı (doğumdan sütten kesime kadarki dönemde) değerlerinin ortalaması sırasıyla 2.9, 57.1 kg, 4.5 kg, 23.6 kg ve 0.249 kg olarak saptanmıştır. Ele alınan özelliklerden VKS ile koyunların canlı ağırlığı, kuzu doğum ağırlığı ve günlük canlı ağırlık artışı arasında pozitif önemli korelasyonlar 0.440, 0.301 ve 0.219 bulunmuştur (P<0.01; P<0.05). VKS'nin kuzularda sadece doğum ağırlığı üzerine önemli (P<0.01) bir etkiye sahip olduğu saptanmıştır. Sonuç olarak Kıvırcık koyun sürüsünde gebelik döneminin sonunda VKS'nin 3.0-3.5 olması ve aynı zamanda gebelik boyunca da bu değerin altına düşmemesinin önemi ortaya konmuştur.

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A Research on Relationships between Some Udder Measurements and Total Milking-only Milk Amount of Saanen x Hair Goat Crossbreed in Breeder ConditionsABSTRACT: In this study; udder measurements, total amount of milking and milk composition of Saanen x Hair goat Fı crossbreed were examined. The study data were obtained from 47 head goats in the 2nd and 3rd parity. Correlations between total amount of milking and udder width, udder circumference, udder length and angle between two teats were identified as 0.598, 0.662, 0.574 and 0.497, respectively (P<0.01). It was determined that there was a positive correlation between the protein rate of milk and total milking amount (0.293), lactose (0.394) and fat-free dry matter (0.648). Whereas a negative correlation was identified between the protein rate of milk and pH value (-0.358) (P<0.05; P<0.01).

Data on 4487 Turkish Saanen kids from 176 bucks and 1318 dam-goats, obtained from the Turkish Saanen goats in the Izmir region and collected between 2018 and 2019, were analyzed to examine the effect of genetic and non-genetic factors on growth traits. The average birth weight of the kids was determined as 3.33 ± 0.68 kg, the average W60 was 13.06 ± 2.94 kg, the average WW was 18.38 ± 4.14 kg, and the average PreWDG until weaning was 0.17 ± 0.04 g. Model 1, which does not account for the maternal effect, and Model 2, which includes the maternal effect, were used in the estimation of genetic parameters. The heritability estimates of BW, W60, WW, and PreWDG ranged from 0.05 to 0.59 in both models. It is recommended to consider the maternal effect as well as the environmental factors in the selection program for the best early breeder selection of kids growing alongside their mothers until the weaning period.

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