Acta Veterinaria et Zootechnica Sinica ›› 2024, Vol. 55 ›› Issue (7): 2890-2900.doi: 10.11843/j.issn.0366-6964.2024.07.010

• Animal Genetics and Breeding • Previous Articles     Next Articles

Research on Feeding Capacity Selection of Lactating Sows Based on Intelligent Precision Feeding

Ruiqi ZHANG1,2(), Yanqin PANG1(), Zaishan LI3, Xiuguo SHANG2, Ganqiu LAN1, Jinbiao GUO2,*(), Yunxiang ZHAO1,3,*()   

  1. 1. College of Animal Science and Technology, Guangxi University, Nanning 530004, China
    2. School of Life Science and Engineering, Foshan University, Foshan 528225, China
    3. Guangxi Yangxiang Co. Ltd, Guigang 537100, China
  • Received:2023-11-20 Online:2024-07-23 Published:2024-07-24
  • Contact: Jinbiao GUO, Yunxiang ZHAO E-mail:582014973@qq.com;Shanxi18404985210@163.com;469190753@qq.com;yunxiangzhao@126.com

Abstract:

This study aimed to analyze the genetic parameters of feed intake traits in lactating sows and conduct a genome-wide association study (GWAS) to evaluate the impact of intelligent feeding technology on these traits during lactation. Feed intake data from 922 first to fourth parity Large White pigs, born between July 2022 and May 2023, were collected to analyze feeding conditions during lactation. The Hiblup software estimated the genetic parameters of feeding traits during lactation, while Plink, GEMMA, and R software conducted a genome-wide association study to identify significant SNP loci and candidate genes associated with feed intake traits. Functional enrichment analysis was then performed on annotated genes within the 420 kb range surrounding these SNP loci. The results indicated that the heritability of feeding traits in lactating Large White pigs ranged from 0.20 to 0.27, and 28 SNP sites were significantly correlated with these traits. Annotation of the associated SNP sites identified 15 candidate genes related to lactation feeding traits, which were significantly enriched in anabolic processes including glucose, fatty acids, hormones, and coenzymes (P < 0.05). HAMP, NDUFB8, UPK1A, CHSY1, U6, and COX7A1 were identified as key candidate genes for feeding traits in Large White pigs during lactation. The above research results provide crucial genetic variation sites and associated genes linked to feeding traits in Large White pigs during lactation, establishing a foundation for further enhancement of feed intake traits by utilizing these genetic markers in future breeding programs, and also offers theoretical support for the breeding of lactating Large White sows with enhanced fertility and lactation performance.

Key words: intelligent feeding, nursing sow, feed intake breeding, genome-wide association study, SNP marker

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