Evaluation-of-Semen-Characteristics-Testicular-Measurements-and-Blood-Parameters-for-Three-Genetic-Groups-of-Goat-Bucks-in-Iraq
Evaluation-of-Semen-Characteristics-Testicular-Measurements-and-Blood-Parameters-for-Three-Genetic-Groups-of-Goat-Bucks-in-Iraq
Rwaida Adnan Ali1, Rahman Hussain Hamza¹, Hayder Mohammed Hassan Habeeb1, Ali J. Al-Nuaimi2
ABSTRACT
This study was conducted to evaluate the semen characteristics, testicular parameters, and blood parameters of three genetic groups of goat bucks. In this investigation, twelve mature bucks (average weight= 25 kg, average age= 2 years) were used: Cyprus (n=4), local black (n=4), and crossbreed (Cyprus X local black) (n=4). Semen and blood samples were collected from all groups every 2 weeks for 3 months. Semen volume, sperm concentration, mass activity , individual motility, live and dead sperm, abnormal sperm, testis weight, testicle circumference, testis length, red blood cell (RBC), white blood cell (WBC), hemoglobin concentration (Hb), urea, cholesterol, and total protein were measured in this study. The results showed that both mass activity and individual motility were significantly greater (P<0.01) in crossbred goat bucks than in local black and Cyprus goat bucks. In addition, the Cyprus goat showed a significant reduction (P<0.01) in dead and abnormal sperm compared with local black and crossbreed. However, local black and crossbreed exhibited significant increase in live sperm compared with Cyprus goat. Furthermore, testis weight, circumference, and length were significantly greater (P<0.05) in local black goats than in Cyprus and crossbreed goats. There were no significant differences between the genetic groups in term of semen volume and sperm concentration. The results revealed a positive correlation between ejaculate volume and RBC, WBC, and total protein levels and a negative correlation between sperm concentration and WBC, Hb, and total protein. In addition, there was a negative correlation between ejaculate volume, individual movement, live sperm, and testis parameters. We can conclude that local goat crossbreeding with high genetic groups may enhance male reproductive performance.
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