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Journal of Integrative Agriculture  2024, Vol. 23 Issue (1): 39-58    DOI: 10.1016/j.jia.2023.04.007
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3D genome organization and its study in livestock breeding

Jie Cheng1, Xiukai Cao2, Shengxuan Wang1, Jiaqiang Zhang1, Binglin Yue1, Xiaoyan Zhang1, Yongzhen Huang1, Xianyong Lan1, Gang Ren1, Hong Chen1, 3# 

1 Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology,      Northwest A&F University, Yangling 712100, China

2 Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou     University, Yangzhou 225009, China

3 College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, China

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摘要  

真核生物基因组按照一定的层次结构折叠在细胞核中,影响基因的转录调控。基因组被折叠成多尺度结构单元,包括染色体领域、区室、拓扑相关结构域(TADs)和DNA环等。这些层结构的识别得益于生物技术的发展,例如基于3C的方法(Hi-CChIA-PET等)、成像工具(2D-FISH3D-FISHCryo-FISH等)和无连接方法(GAMSPRITE等)。在过去的二十年中,大量研究表明,基因组的三维结构可以通过多种机制调控细胞过程,例如调节增强子活性和启动子-增强子相互作用等。然而,在畜牧领域,对三维基因组学的研究相对较少。因此,迫切需要开展畜禽三维基因组研究以便更全面地了解基因组与生产性状之间的潜在关系。本文总结了人类和小鼠三维基因组学及其生物学功能的最新进展,并重点探讨了三维基因组学在畜禽肌肉发育中的生物学功能及其在动物育种中的意义。



Abstract  

Eukaryotic genomes are hierarchically packaged into cell nucleus, affecting gene regulation.  The genome is organized into multiscale structural units, including chromosome territories, compartments, topologically associating domains (TADs), and DNA loops.  The identification of these hierarchical structures has benefited from the development of experimental approaches, such as 3C-based methods (Hi-C, ChIA-PET, etc.), imaging tools (2D-FISH, 3D-FISH, Cryo-FISH, etc.) and ligation-free methods (GAM, SPRITE, etc.).  In recent two decades, numerous studies have shown that the 3D organization of genome plays essential roles in multiple cellular processes via various mechanisms, such as regulating enhancer activity and promoter-enhancer interactions.  However, there are relatively few studies about the 3D genome in livestock species.  Therefore, studies for exploring the function of 3D genomes in livestock are urgently needed to provide a more comprehensive understanding of potential relationships between the genome and production traits.  In this review, we summarize the recent advances of 3D genomics and its biological functions in human and mouse studies, drawing inspiration to explore the 3D genomics of livestock species.  We then mainly focus on the biological functions of 3D genome organization in muscle development and its implications in animal breeding.

Keywords:  3D genome organization        3D genomic methodology        regulatory mechanisms        muscle development        livestock breeding
  
Received: 05 December 2022   Accepted: 23 February 2023
Fund: 

This work was supported by the National Natural Science Foundation of China (31972558) and the Agricultural Improved Seed Project of Shandong Province, China (2020LZGC014).


About author:  Jie Cheng, E-mail: chengjie9412@163.com; #Correspondence Hong Chen, E-mail: chenhong1212@263.net

Cite this article: 

Jie Cheng, Xiukai Cao, Shengxuan Wang, Jiaqiang Zhang, Binglin Yue, Xiaoyan Zhang, Yongzhen Huang, Xianyong Lan, Gang Ren, Hong Chen. 2024. 3D genome organization and its study in livestock breeding. Journal of Integrative Agriculture, 23(1): 39-58.

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