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Ma Z, Jiang K, Wang D, Wang Z, Gu Z, Li G, Jiang R, Tian Y, Kang X, Li H, Liu X. Comparative analysis of hypothalamus transcriptome between laying hens with different egg-laying rates. Poult Sci 2021; 100:101110. [PMID: 34102485 PMCID: PMC8187251 DOI: 10.1016/j.psj.2021.101110] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 12/30/2020] [Accepted: 03/02/2021] [Indexed: 12/27/2022] Open
Abstract
Egg-laying performance is one of the most important economic traits in the poultry industry. Commercial layers can lay one egg almost every day during their peak-laying period. However, many Chinese indigenous chicken breeds show a relatively low egg-laying rate, even during their peak-laying period. To understand what makes the difference in egg production, we compared the hypothalamus transcriptome profiles of Lushi blue-shelled-egg chickens (LBS), a Chinese indigenous breed with low egg-laying rate and Rhode Island Red chickens (RIR), a commercial layer with relatively high egg-laying rate using RNA-seq. A total of 753 differentially expressed genes (DEGs) were obtained. Of these DEGs, 38 genes were enriched in 2 Gene Ontology (GO) terms, namely reproduction term and the reproductive process term, and 6 KEGG pathways, namely Wnt signaling pathway, Oocyte meiosis, GnRH signaling pathway, Thyroid hormone signaling pathway, Thyroid hormone synthesis and MAPK signaling pathway, which have been long known to be involved in egg production regulation. To further determine the core genes from the 38 DEGs, protein-protein interaction (PPI) network, co-expression network and transcriptional regulatory network analyses were carried out. After integrated analysis and experimental validation, 4 core genes including RAC1, MRE11A, MAP7 and SOX5 were identified as the potential core genes that are responsible for the laying-rate difference between the 2 breeds. These findings paved the way for future investigating the mechanism of egg-laying regulation and enriched the chicken reproductive regulation theory.
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Affiliation(s)
- Zheng Ma
- College of Animal Science, Henan Agricultural University, Zhengzhou 450046, China; School of Life Science and Engineering, Foshan University, Foshan 528225, China
| | - Keren Jiang
- College of Animal Science, Henan Agricultural University, Zhengzhou 450046, China
| | - Dandan Wang
- College of Animal Science, Henan Agricultural University, Zhengzhou 450046, China
| | - Zhang Wang
- College of Animal Science, Henan Agricultural University, Zhengzhou 450046, China
| | - Zhenzhen Gu
- School of life Sciences and Technology, Xinjiang University, Urumqi 830046, China
| | - Guoxi Li
- College of Animal Science, Henan Agricultural University, Zhengzhou 450046, China; Henan Innovative Engineering Research Center of Poultry Germplasm Resource, Henan Agricultural University, Zhengzhou 450046, China; International Joint Research Laboratory for Poultry Breeding of Henan, Henan Agricultural University, Zhengzhou 450046, China
| | - Ruirui Jiang
- College of Animal Science, Henan Agricultural University, Zhengzhou 450046, China; Henan Innovative Engineering Research Center of Poultry Germplasm Resource, Henan Agricultural University, Zhengzhou 450046, China; International Joint Research Laboratory for Poultry Breeding of Henan, Henan Agricultural University, Zhengzhou 450046, China
| | - Yadong Tian
- College of Animal Science, Henan Agricultural University, Zhengzhou 450046, China; Henan Innovative Engineering Research Center of Poultry Germplasm Resource, Henan Agricultural University, Zhengzhou 450046, China; International Joint Research Laboratory for Poultry Breeding of Henan, Henan Agricultural University, Zhengzhou 450046, China
| | - Xiangtao Kang
- College of Animal Science, Henan Agricultural University, Zhengzhou 450046, China; Henan Innovative Engineering Research Center of Poultry Germplasm Resource, Henan Agricultural University, Zhengzhou 450046, China; International Joint Research Laboratory for Poultry Breeding of Henan, Henan Agricultural University, Zhengzhou 450046, China
| | - Hong Li
- College of Animal Science, Henan Agricultural University, Zhengzhou 450046, China
| | - Xiaojun Liu
- College of Animal Science, Henan Agricultural University, Zhengzhou 450046, China; Henan Innovative Engineering Research Center of Poultry Germplasm Resource, Henan Agricultural University, Zhengzhou 450046, China; International Joint Research Laboratory for Poultry Breeding of Henan, Henan Agricultural University, Zhengzhou 450046, China.
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