Which follicle genes differ in high- vs low-laying hens?
RNA-seq of 18 follicle libraries from 10 high-laying Lohmann Brown and 10 low-laying Jilin Black hens found 236/544/386 DEGs at LWF/SYF/LYF stages, 13 genes shared across stages, and KEGG hits including neuroactive ligand–receptor and cAMP signaling.
Source
Transcriptome Analysis of Ovarian Follicles Reveals Potential Pivotal Genes Associated With Increased and Decreased Rates of Chicken Egg Production
Study at a glance
- Design
- Animal / in-vitro — RNA-seq of LWF/SYF/LYF ovarian follicles from high- vs low-laying hens (Lohmann Brown vs Jilin Black); 18 libraries, DEG and KEGG analysis
- N
- N=20 · 10 hens per breed (LB high-laying vs JB low-laying) at 21 weeks; 18 cDNA libraries across three follicle stages
- Population
- Lohmann Brown (HR) and Jilin Black (LR) laying hens, ovarian follicles at 21 weeks
- Outcome
- Differentially expressed unigenes and pathways linked to egg-production rate
Structured fields used in claim comparison tables when every cited study has a complete layer.
What they did
Harvested LWF, SYF, and LYF follicles at 21 weeks from 10 birds per breed (egg production ~53% vs 11%), built 18 Illumina libraries, called DEGs (padj < 0.05, |log2FC| > 1), and annotated with GO/KEGG plus RT-qPCR of candidates.
What they found
236, 544, and 386 unigenes differed in LWF, SYF, and LYF. Thirteen DEGs were co-expressed in all three stages; 18 candidates (P2RX1, CAB39L, BLK, and others) were tied to laying. Pathways included neuroactive ligand–receptor interaction, cell adhesion molecules, PPAR, and cAMP signaling.
The limits
What it doesn't show
Bulk follicle RNA-seq in two breeds cannot prove any single DEG causes laying-rate differences, and 10 hens/breed is a small genetic sample.
Key terms
- LWF / SYF / LYF
- Large white, small yellow, and large yellow ovarian follicles at successive growth stages.
- HR vs LR
- High vs low egg-laying rate lines: Lohmann Brown vs Jilin Black.
- DEG
- Differentially expressed gene between HR and LR at a follicle stage.
- padj / log2FC
- Adjusted p < 0.05 and |log2 fold-change| > 1 defined DEGs.
- cAMP signaling
- KEGG pathway nominated as a laying-trait candidate.
- P2RX1
- One of 18 candidate genes listed as potentially related to egg production.
Flashcards
Research intelligence for this paper
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Quiz yourself
Libraries numbered:
Common questions
How many libraries?
18 cDNA libraries from three follicle stages × two laying-rate groups.
DEG counts by stage?
236 (LWF), 544 (SYF), 386 (LYF).
Shared across all stages?
13 co-expressed DEGs.
Hens per breed?
Ten birds each, sampled at 21 weeks.
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