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Comprehensive RNA-Seq profiling to evaluate lactating sheep mammary gland transcriptome.

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Area of Science:

  • Genomics and transcriptomics
  • Animal science and dairy production

Background:

  • RNA sequencing (RNA-Seq) is a powerful tool for comprehensive transcriptome analysis.
  • Understanding mammary gland gene expression is crucial for improving dairy sheep production traits.

Purpose of the Study:

  • To perform a comprehensive transcriptome profiling of the sheep lactating mammary gland using RNA-Seq.
  • To characterize transcriptomic differences in relation to milk production traits in two dairy sheep breeds.

Main Methods:

  • Collected milk somatic cell RNA from eight ewes (four Churra, four Assaf) at four lactation stages (days 10, 50, 120, 150).
  • Generated RNA-Seq data using an Illumina HiSeq 2000 sequencer for high-throughput transcriptome analysis.

Main Results:

  • Generated extensive transcriptome information, enabling characterization of transcripts, isoforms, and polymorphisms.
  • Quantified gene expression levels and identified differential gene regulation across lactation stages and breeds.
  • Provided insights into the biological processes underlying lactation and milk production aptitude in sheep.

Conclusions:

  • RNA-Seq offers a valuable approach for detailed mammary gland transcriptome profiling in sheep.
  • The study provides a foundation for understanding genetic variations influencing milk production in dairy sheep.
  • Findings can aid in breeding programs aimed at enhancing milk yield and quality in sheep.