ARTIFICIAL INSEMINATION IN FARM ANIMALS - Phenix-Vet

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126Artificial Insemination in Farm AnimalsItem Control Group 1 Group 2 Group 3 Group 4Density of sertoli cell(number per seminiferoustubule)Density of spermatogenic cell(number per seminiferoustubule)Density of leydig cell(number/mm2)Thickness of germinalepithelium (μm)Diameter of seminiferoustubule (μm)10.03±2.08 b 11.20±2.13 ab 13.57±0.56 a 13.40±1.13 a 13.33±1.27 a60.13±25.18 b 93.03±44.90 ab 145.10±52.79 a 137.35±19.59 ab 113.80±36.05 ab285.14±14.82 299.74±18.30 325.87±15.69 320.49±6.52 313.57±38.1075.05±17.21 b 91.31±36.23 ab 143.72±28.17 a 116.02±15.24 ab 141.28±29.48 a303.93±51.41 c 334.02±57.55 bc 465.78±56.16 a 374.32±16.73 abc 443.66±64.45 abValues in same row with same superscript differ insignificantly (P>0.05), with different superscriptsdiffer significantly (P
Effect of Vitamin E on the Development of Testis in Sheep 127Compared with the Control, supplementing VE in diets increased the diameter ofseminiferous tubule, it was significantly wider in Group 2 (at the level of 200 IU sheep -1 d -1 )than in Control and Group 1 (P0.05).Feeding with dietary VE tended to have a higher density of sertoli cell, it was significantlyincreased in Group 2, Group 3 and Group 4 compared with Control (P0.05). Similar results were observed in thepresent study, the width, length, transverse girth, vertical girth and volume of testis in VEtreated groups were higher than Control, but no significant differences were observedbetween Control and treatment groups (P>0.05).This study proved that for Aohan fine-wool sheep, the thickness of germinal epithelium,diameter of seminiferous tubule and the density of spermatogenic cell, sertoli cell and leydigcell in VE treatment groups were larger than in Control. Similar results have been proved inBoer goats in our previous research (Zhu et al., 2009), which showed that diameters ofseminiferous tubules and numeric density of spermatogenic cells tended to be larger in80 IU kid −1 d −1 VE supplemented group compared to the control group (P0.05).Sertoli cells are the nurse cells for the spermatogonium in the seminiferous tubules and canthus influence the development of the sperm precursor cells and the subsequent number ofspermatids. This effect may be accomplished through their production of various factorssuch as plasminogen activator, transferrin, and sertoli cell growth factor (Lacroix et al., 1977;Feig et al., 1980; Skinner and Griswold, 1980). Besides, sertoli cells can maintain highconcentrations of androgens in seminiferous tubules and epididymis (Lacroix et al., 1977),they can also transport testosterone from the testis into epididymis (Krishnamoorthy et al.,2005). Our research showed supplementing VE in diet increased the density of sertoli cell,which in Group 2, Group 3 and Group 4 was significantly higher than in Controlrespectively (P
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ARTIFICIAL INSEMINATION IN FARM ANIMALS - Phenix-Vet

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