Kıl keçisi tekeleri ve Saanen X Kıl keçisi (F1) melezi tekelerinin bazı üreme özelliklerinin karşılaştırılması (Comparison of Some Reproductive Features of Pure Hair Goat Bucks and Saanen x Hair Goat (F1) Crossbreed Bucks)

Abstract

This study was conducted to compare some reproductive features of Pure Hair Goat bucks and Saanen x Hair Goat (F1) crossbreed bucks. For this purpose, 11 Hair Goat bucks and 11 Saanen x Hair Goat (F1) crossbreed bucks, at 8-8.5 months of age, were used. Body weight (kg), scrotal circumference (cm), right and left testis length (cm), right and left testis thickness (cm), scrotal thickness (cm), testes and epididymides weight (g) were measured in two genotypes. Semen was collected by an electroejaculator from the bucks. Volume, motility, concentration and abnormal spermatozoa rates were determined in collected semen. Blood samples that were taken from jugular vein were centrifuged at 5000 rpm for 10 min. and sera were separated. The serum testosterone levels were determined by ELISA method. No difference WAS found in body weight, testes dimensions, sperm motility and abnormal spermatozoa rates between Pure Hair Goat bucks and Saanen x Hair Goat (F1) crossbreed bucks. However, there were significant differences in testosterone level (p<0.05), semen volume (p<0.05) and sperm concentration (p<0.01) between two genotypes. There were significant (p<0.01, p<0.05) positive correlations among all parameters both in Pure Hair Goat bucks and Saanen x Hair Goat (F1) crossbreed bucks except body weight, scrotal thickness and abnormal sperm rate. But, a significant negative correlation (p<0.05) was determined between abnormal spermatozoa rate and sperm motility. In conclusion, although the spermatological characteristics of crossbreed bucks were negatively affected from the mating between Saanen bucks and Hair Goat, these values that were found are normal for bucks.