Acta Veterinaria et Zootechnica Sinica ›› 2023, Vol. 54 ›› Issue (10): 4154-4163.doi: 10.11843/j.issn.0366-6964.2023.10.014

• ANIMAL GENETICS AND BREEDING • Previous Articles     Next Articles

Transcriptome Data from Chicken Embryo Heart Tissue Identified Key Genes for Altitude Hypoxia Adaptation in Xueyu White Chickens

CHEN Xuejiao2, LIU Huijie1, ZANG Lei1, FENG Jing1, PENG Da1*, ZHANG Hao2*   

  1. 1. Institute of Animal Science, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa 850009, China;
    2. Plateau Animal and Poultry Genetic Resources Research Center, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
  • Received:2023-05-18 Online:2023-10-23 Published:2023-10-26

Abstract: The aim of this study was to identify candidate genes for hypoxia adaptation in chicken embryos by analyzing the gene expression changes in embryonic heart tissues of White Leghorn (WL) and Xueyu White (XYW) chickens incubated under hypoxic conditions. The eggs were incubated at high altitude. The heart tissues were collected from embryos at day 16 of incubation, and the RNAs were extracted for RNA sequencing (RNA-seq). Differently expressed genes (DEGs) were screened, which were validated using fluorescence quantitative PCR (qRT-PCR). The functional enrichment analysis and a transcription factor-target gene regulatory network was constructed to further screen candidate genes related to hypoxia adaptation in XYW. The 253 DEGs were screened in heart tissues between XYW and WL, and 5 DEGs were randomly selected for qRT-PCR validation. Their expression trend was consistent with the sequencing results. Enrichment analysis showed that DEGs were mainly enriched in biological processes and signaling pathways related to cardiovascular development and cardiac function. Comparing DEGs with known chicken transcription factors, FOXP2 and HOXA2 were screened, which regulated angiogenesis, myocardial contraction and other functions, and played a key role in hypoxia adaptation in XYW embryos. Through the analysis of transcriptomic data, TENM2, NOG, SMOC1, CCBE1 and other candidate genes were identified for plateau hypoxia adaptation in chicken embryos, which provide a theoretical basis for analyzing the molecular mechanism of plateau hypoxia adaptation in XYW.

Key words: Xueyu White chicken, White Leghorn chicken, hypoxia adaptation, heart, transcriptome

CLC Number: