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首页> 外文期刊>Veterinary and Animal Science >Fertility risk factors in transferring Japanese Black embryos into dairy heifers: An epidemiological study
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Fertility risk factors in transferring Japanese Black embryos into dairy heifers: An epidemiological study

机译：将日本黑胚胎转移到乳品小母牛中的生育危险因素：流行病学研究

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摘要

The aims of this study were 1) to summarize the current status of Japanese Black (JB) embryo transfer into Holstein heifers, which is carried out on a commercial basis in Japan, and 2) to reveal fertility risk factors, including those from the environment (year and season of transfer), recipient (age, number of transfers, clinical status of the ovaries) and embryo (quality, stage, state, genetic background). We used data from 4467 JB fresh or frozen embryo transfers into Holstein heifers conducted by Zen-noh Embryo Transfer Center during 2016–2018, and the differences in fertility risk due to factors related to the environment, recipient, and embryo were statistically evaluated. Differences in fertility risk due to each variable were observed, leading to significant differences in fertility with respect to year of transfer, embryo quality, embryo state, and embryo breed. These results suggest that the fertility of JB embryos might depend on differences in genetic background. There have been no previous reports of differences in embryo fertility due to the differences among JB's bloodline combinations. In the future, overall reproductive efficiency must be monitored, including the effects of different bloodline combinations on the success of embryo recovery and transfer.
机译：本研究的目的是1）总结日本黑人（JB）胚胎转移到荷斯坦的小母牛的现状，该霍尔斯坦小母牛在日本的商业基础上进行，2）以揭示生育危险因素，包括来自环境的生育危险因素（转让年份和季节），受体（年龄，转移次数，卵巢的临床状况）和胚胎（质量，阶段，州，遗传背景）。我们将4467 jb新鲜或冷冻胚胎转移的数据用于2016 - 2018年在2016 - 2018年期间由禅 - Noh胚胎转移中心进行的Holstein小船员，并且由于与环境，受体和胚胎有关的因素，生育风险的差异在统计学评价。观察到每个变量引起的生育风险的差异，导致转移，胚胎质量，胚胎州和胚胎品年度的生育能力差异显着差异。这些结果表明JB胚胎的生育能力可能取决于遗传背景的差异。由于JB血统组合的差异，胚胎生育率的差异是没有差异的。将来，必须监测整体生殖效率，包括不同血统组合对胚胎恢复和转移成功的影响。

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