Abstract
Domestication and artificial selection have modified the genome landscape of the pig. The identification of selection signatures in the genome can help to elucidate the selection mechanisms and uncover the causal genes related to the phenotypic variations between domestic pig breeds. We scanned the genomes of Korean imported pig breeds against native breeds using Z-transformed Fst (ZFST) and Heterozygosity (ZHp) statistics to search for the signatures of positive selection. We identified 411 (ZFST = 175; ZHp = 256) putatively selected genes in commercial breeds. The gene regions identified were harboring those related to immunity, coat color, reproduction function and other traits. Several genes (e.g., PLSCR4, AGTR1 and CORIN) were related to reproduction traits such as fertility, ovulation rate, and uterine function. This study revealed genes which improve our understanding of the biological mechanisms of higher litter sizes, the phenotype of interest, in higher litter pig breeds.
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Acknowledgements
This work was carried out with the support of “Cooperative Research Program for Agriculture Science & Technology Development (Project No. PJ01111501)” Rural Development Administration, Republic of Korea.
Author contributions
Conceived and designed the study: WS, MT, HK; Analyzed the data: WS; Wrote the paper: WS, MT; helped writing the paper: JY, TK, DJ; coordinated the project: HK.
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Wonseok Lee declares that he/she does not have conflict of interest on the contents of manuscript. Mengistie Taye that he/she does not have conflict of interest on the contents of manuscript. Taehyung Kwon that he/she does not have conflict of interest on the contents of manuscript. Joon Yoon that he/she does not have conflict of interest on the contents of manuscript. Dongsung Jang that he/she does not have conflict of interest on the contents of manuscript. Shunsuke Suzuki that he/she does not have conflict of interest on the contents of manuscript. Heebal Kim that he/she does not have conflict of interest on the contents of manuscript.
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The experiment and all its procedures were approved by the regional Ethical Committees (JNU Animal Bioethics Committee Approval Number: 2013–0009, National Institute of Animal Science’s Institutional Animal Care and Use Committee: 2009–077).
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An erratum to this article is available at http://dx.doi.org/10.1007/s13258-017-0534-7.
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Lee, W., Taye, M., Kwon, T. et al. Identifying candidate positive selection genes in Korean imported pig breeds. Genes Genom 39, 557–565 (2017). https://doi.org/10.1007/s13258-017-0529-4
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DOI: https://doi.org/10.1007/s13258-017-0529-4