Enhance the annotation of long noncoding RNAs in the duck genome using multi-tissue transcriptome data

Area of Science:

• Genomics
• Molecular Biology
• Poultry Science

Background:

• Long non-coding RNAs (lncRNAs) are crucial regulators in biological processes, but their annotation in the duck genome is limited.
• Ducks are economically important poultry, and understanding lncRNAs is vital for improving meat and egg production.

Purpose of the Study:

• To systematically annotate lncRNAs in the duck genome using extensive transcriptome data.
• To characterize the structural features and predict the regulatory functions of duck lncRNAs.
• To identify various types of lncRNAs, including tissue-specific, housekeeping, sex-biased, and conserved lncRNAs.

Main Methods:

• Genome-wide annotation of lncRNAs using 1,350 transcriptome datasets.
• Structural analysis of lncRNAs compared to protein-coding genes.
• Construction of lncRNA-PCG co-expression networks to predict functions.
• Identification of tissue-specific, housekeeping, sex-biased, and conserved lncRNAs.

Main Results:

• Annotation of 22,831 lncRNA loci, including 9,455 novel ones, in the ZJU1.0 duck reference genome.
• Duck lncRNAs exhibit shorter lengths, fewer exons, and lower expression levels than protein-coding genes.
• Predicted lncRNA functions involve muscle-related pathways like sarcomere, cytoskeleton, and focal adhesion.
• Identification of diverse lncRNA categories, including tissue-specific and conserved lncRNAs.

Conclusions:

• This study provides the most comprehensive lncRNA resource for the duck genome to date.
• The findings lay the groundwork for understanding lncRNA functions in duck biology and artificial selection.
• Predicted lncRNA roles in muscle development offer insights for poultry breeding and genetic improvement.