Abstract

In cattle, early embryonic failure plays a major role in the limitation of reproductive performance and is influenced by genetic effects. Suboptimal oocyte quality, including an inadequate store of maternal factors, is suspected to contribute to this phenomenon. In the present study, 13 Montbeliarde cows were phenotyped on oocyte quality, based on their ability to produce viable embryos after in vitro maturation, fertilisation and culture for 7 days. This discriminated two groups of animals, exhibiting developmental rates below 18.8% or above 40.9% (relative to cleaved embryos). Using microarrays, transcriptomic profiles were compared between oocytes collected in vivo from these two groups of animals. The difference in oocyte development potential was associated with changes in transcripts from 60 genes in immature oocytes and 135 genes in mature oocytes (following Bonferroni 5% correction). Of these, 16 and 32 genes were located in previously identified fertility quantitative trait loci. A subset of differential genes was investigated on distinct samples by reverse transcription-quantitative polymerase chain reaction. For SLC25A16, PPP1R14C, ROBO1, AMDHD1 and MEAF6 transcripts, differential expression was confirmed between high and low oocyte potential animals. Further sequencing and searches for polymorphisms will pave the way for implementing their use in genomic selection.

Keywords

development; embryo; fertility; gene expression; transcriptome

Published in

Reproduction, Fertility and Development
2016, Volume: 28, number: 9, pages: 1276-1287
Publisher: CSIRO PUBLISHING

SLU Authors

• Humblot, Patrice

  • Department of Clinical Sciences, Swedish University of Agricultural Sciences
    
  • National Union of Cooperatives for Animal Insemination (UNCEIA)

UKÄ Subject classification

Developmental Biology


Publication identifier

DOI: https://doi.org/10.1071/RD14353

Permanent link to this page (URI)

https://res.slu.se/id/publ/83258