Journal
THERIOGENOLOGY
Volume 139, Issue -, Pages 36-42Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.theriogenology.2019.07.013
Keywords
Duroc; Pig; GWAS; Reproductive traits; Mortality
Categories
Funding
- Earmarked Fund for China Agriculture Research System [CARS-35]
- National Natural Science Foundation of China [31772556]
- Guangdong S&T Project, China [2017A020208043]
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Litter size is one of the most important economic traits for pig production as it is directly related to the production efficiency. As an important litter size trait in pigs, the number of piglets born alive at birth (NBA) receives widespread interests in the pig industry. However, traits of piglets born dead, including the number of stillborn piglets (NS) and the piglets mummified at birth (NM) should be noted to explain the loss of reproduction. Herein, in the present study, a total of 803 producing sows were sampled and 2807 farrowing records for NBA, NM, and NS traits were collected in a Duroc swine population. Subsequently, a genome-wide association study (GWAS) was performed for NBA, NS and NM in parity groups 1 to 5. In total, 10 putative regions were found associated with these traits. After stepwise conditional analyses around the putative regions, eight independent signals were ultimately identified for NBA, NS, and NM, and there were seven promising candidate genes related to these traits, including ARIDIA, RXRG, NFATC4, ABTB2, GRAMD1B, NDRG1, and APC. Our findings contribute to the understanding of the significant genetic causes of piglets born alive and dead, and could have a positive effect on pig production efficiency and economic profits. (C) 2019 Elsevier Inc. All rights reserved.
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