An investigation on the effect of hybrid vigour on Carcass characteristeis of crossing between montain(Eraghi) and farahani sheep.
1995
Hoseini, Seayd Davoud | Asadi | Mirzaeei, Saraf Ali | Jafariyehe Ahangari | Monem | Esmaeili
Wold wide there are many handereds of breed of sheep , some predominantly specialized for wool production, some for sheep meat, and yet others for milk. many breeds are self - contained , but a certian amount of crossbreeding is carried out , particulary between breeds specialized for different functions in order to achieve complementarity by combining the merits in the hybrid off spring. In this study, the crossbreeding carried out between two spicies of sheep, wild (mountain) sheep and Domestic (farahani) sheep by artificial insemination. For this mean, firsty The semen collected from mountain rams by using Electro - ejaculator and stimulating of the nerev plexus near the pelvic genitalia using a rectal electrode (probe) Then the collected semen was examinated to determin sperm concentration and to calculate dilution rate and volume of inseminate appropriate to the method of insemination The ewes were synchronized inEstrus , using lomg I day progetron in tramusiulary for 14 days The occurrence of oestrus was determined by teaser ram , then diluting semen was inseminated intracervically . for this mean, the cervix was located using an illuminated speculum and the seme deposited intQ the first cervical fold . The results of study is 17 hybrid off springs with 3.8 kg birth weight, diferent colours and thin fiber with 13 J.L in diameter, high daily growth and without tail fat
Показать больше [+] Меньше [-]