Comparative Transcriptomics of Feather Follicles Reveals Potential Candidate Genes for Duck Feather Type...

Area of Science:

• Avian biology
• Molecular genetics
• Developmental biology

Background:

• Down and contour feathers exhibit distinct structures and functions.
• The molecular basis for these feather type differences is not well understood.

Purpose of the Study:

• To investigate the molecular mechanisms differentiating down and contour feather development.
• To identify key genes and pathways involved in feather follicle differentiation in Beijing ducks.

Main Methods:

• Transcriptomic sequencing of feather follicles from four anatomical regions of Beijing ducks.
• Paired comparisons between down and contour feather generating regions to identify differentially expressed genes (DEGs).
• Pathway enrichment analysis of identified DEGs.

Main Results:

• Identified 36 core differentially expressed genes (DEGs) consistently found between down and contour feathers.
• Key DEGs include HOX transcription factors, ZIC family members, WNT4, TBX4, BMP5, cytoskeletal genes, extracellular matrix regulators, and lipid metabolism genes.
• Pathway analysis indicated involvement of positional identity, cytoskeletal organization, extracellular matrix remodeling, and lipid metabolism modules.

Conclusions:

• Transcriptomic variations in feather follicles are linked to specific gene modules controlling feather differentiation.
• The identified gene set provides insights into the molecular control of feather type specification.
• This study offers a foundation for molecular breeding strategies to enhance down feather yield and quality in ducks.