Comparison of the developmental competence and quality of bovine embryos obtained by in vitro fertilization with sex-sorted and unsorted semen from seven bulls
文献类型: 外文期刊
第一作者: Liu, Xia
作者: Liu, Xia;Hu, Tingxi;Sun, Weijun;Hao, Haisheng;Liu, Yan;Zhao, Xueming;Zhu, Huabin;Du, Weihua;Hu, Tingxi
作者机构:
关键词: Embryonic development;Apoptosis;ICM/TCN;Sex-sorted semen;Unsorted semen;Gene expression
期刊名称:LIVESTOCK SCIENCE ( 影响因子:1.943; 五年影响因子:2.252 )
ISSN:
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收录情况: SCI
摘要: In artificial insemination, semen quality is considered to be closely related to the resultant pregnancy rate and the ratio of embryo development into fetus. The aim of this study was to evaluate the quality of sex-sorted versus unsorted semen used for in vitro fertilization (IVF). Semen was collected from seven bulls (A)-(G); each sample was divided in two, sex-sorted or not. Following IVF, the fertilization rate, embryonic cleavage rate, blastocyst formation rate, total cells number (TCN) of blastocysts, inner cell mass (ICM)/TCN ratio and apoptotic cell ratio (ACR) were determined. The results showed that except for bull C, the unsorted semen yielded a significantly higher LW rate than sex-sorted semen (p<0.05). A significantly higher percentage of embryos reached the two-cell stage using unsorted semen than the matched sex-sorted semen from the seven bulls (both p<0.05), and the blastocyst stage from bulls A, C, D, E and G. However, there was no significant difference in the ICM/TCN ratio between the IVF blastocysts and the sexed blastocysts from bulls A, C, D, E, F and G (p>0.05). Also, there was no significant difference in the expression of IGF1 gene in bovine embryos produced with sorted or unsorted semen (p>0.05). However, the GDF9 gene expression in sexed embryos from bull D was significantly higher than in the others (p < 0.05). No significant difference was found in ACR among the seven bulls, while there were differences of Box and Bcl-2 expression in the sorted sperm of only one bull. The results obtained from the sex-sorted or unsorted semen from the seven different bulls varied, although semen from bull A yielded the highest embryonic cleavage rate, blastocyst rate and ICM/TCN ratio. In conclusion, the quality of unsorted semen was generally better than that of sex-sorted semen in the respect to embryo productivity in vitro. Additionally, individual differences in fertility were observed among different bulls. (C) 2015 Elsevier B.V. All rights reserved.
分类号: S82
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