105 Sexual dimorphism in equine D8 blastocysts
Journal of Equine Veterinary Science(2021)
摘要
In mammals, male embryos grow faster. Equine embryo size is highly variable for same developmental stage, with no reported relation to embryo sex nor gene expression. Our objective was to evaluate gene expression sexual dimorphism on equine D8 blastocysts. Non-nursing, Saddlebred mares located on 2 experimental farms were inseminated with the semen of one unique stallion per farm. At 8 d post ovulation, 17 and 11 embryos from each farm, each from a different dam, were recovered by uterine flushing and bissected to obtain samples of pure (TE) or inner cell mass enriched (TE-ICM) trophoblast. RNA expression was analyzed separately in the TE-ICM and the TE of 16 female and 12 male embryos using paired end, non-oriented RNA sequencing (Illumina, NextSeq500). To discriminate gene expression in the ICM from that in the TE, deconvolution (DeMixT R package) was used on the TE-ICM data. Differential expression was analyzed (DESeq2) with farm and embryo size as cofactors using a false discovery rate (FDR)
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关键词
Embryo,Horse
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