Abstract Awang sheep (Ovis aries), as a special and precious sheep breed resource in the Tibet Plateau, has unique flavors, high-quality meat production and strong plateau adaptability. To prevent the decline of Awang sheep in stock and to protect local germplasm resources, this study analyzed the effects of different follicle-stimulating hormone (FSH) sources and its doses of FSH, superovulation times and the estrus history on the effect of superovulation in Awang sheep by synchronous estrus, superovulation and surgical embryo recovery. The results showed that domestic FSH had the best effect on superovulation in Awang sheep. The average number of corpus luteum and average effective embryos in domestic FSH group were significantly higher than those in the imported FSH group and the domestic + imported FSH group (P<0.05). There was no significant difference in the average number of available embryos and embryo recovery rate (P>0.05). The 270 and 500 IU of domestic FSH had the same effect on superovulation in Awang sheep, and had no significant effect on the superovulation effect of Awang sheep weighing(>50 kg and 40~50 kg), respectively. There was no significant effect of oestrus history on the effect of superovulation. In addition, the total number of corpus luteum and the number of recovered embryos in the first superovulation group were extremely significant higher than those in the multiple superovulation (P<0.01). In conclusion, 270 IU of domestic FSH had the best effect on superovulation in Awang sheep, which can be used as a reference for the conservation and propagation of local Awang sheep.
LI Tao,WANG Xing-Shuan,YU Lian, et al. Comparative on Superovulation Effects with FSH Source and Its Dosage on Tibet Awang Sheep (Ovis aries)[J]. 农业生物技术学报, 2023, 31(9): 1890-1898.
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