Dr. Abdelmotaleb Ahmed Elokil :: Publications:

Abstract: A total number of 30 bucks in three breed groups of rabbits named Gabali, V-line and Moshtohor line (M-line, as new synthetic line 50% Gabali and 50% V-line)), 10 bucks from each breed group were evaluated in project of synthesizing new rabbit line. Traits of ejaculate volume (EV), semen pH, mass motility (MM), sperm cell concentration (SC), individual motility (IM), live sperm per ejaculate (LS), sperm abnormalities per ejaculate (SA) were studied. Significant differences for EV, SC, IM, MM, LS, and SA in Gabali, V-line and M-line were detected being 0.60, 0.66 and 0.72 ml for EV, 405.83, 474.48 and 456.1 x106 for SC, 46.95, 48.63, and 54.82% for IM, 2.26, 2.22 and 2.41 grads for MM, 80.63, 82.38, and 81.99% for LS, 11.79, 12.92, and 12.09% for SA, respectively. No significant differences for semen pH grad due to the effect of breed group. It is showed that M-line bucks had superiority in EV (14.3%), semen pH (0.13%), SC (3.6%), MM (7.6%), IM (14.7%), LS (0.6%) and SA (-2.14%) over the two foundations. Significant differences for semen pH, EV, SC, IM, MM, LS, and SA in autumn, winter, spring and summer seasons were detected being 7.70, 7.74, 7.79 and 7.75 grad for semen pH, 0.67, 0.65, 0.68 and 0.45 ml for EV, 444.37, 447.72, 446.93 and 442.86 x106 for SC, 54.53, 57.09, 48.77, and 40.12% for IM, 2.57, 2.73, 2.16 and 1.74 grads for MM, 81.21, 83.24, 84.02 and 77.54% for LS, 11.66, 11.02, 11.48, and 14.92% for SA, respectively. The highest values in semen pH, EV, SC, IM, MM, LS, and SA detected to be semen pH (7.88) appeared during the summer with the M-line, 0.7 ml for EV appeared during the autumn with the V-line, 474.13 x106 for SC was recorded during the spring with the M-line, 58% for IM was recorded during the autumn with M-Line, 2.81 for MM was recorded during the winter with the Gabali, 87.47% for LS was recorded during the spring with V-line, 16.96% for SA was recorded during the summer with V-line, respectively. While the lowest values 7.62 in semen pH appeared during the autumn with the M-line, 0.47ml in EV appeared during the summer with the Gabali, 393.38 x106 in SC was recorded during the summer with the V-line, 33.96% in IM was recorded during the summer with the Gabali, 1.61 grads in MM was recorded during the summer with the V-line, 75.94% in LS was recorded during the summer with the V-line, 10.67 % in SA was recorded during the spring with the Gabali respectively. It could be concluded that the M-line, followed by V-line of buck rabbits could be used as effective indicators for good semen quality. Moreover, based on heterosis percentages, it is recommended that the M-line bucks had superiority in all the studied semen characteristics which might due to dominance and/or over-dominance genes action at different loci on chromosomes.