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Asian-Australas J Anim Sci > Volume 30(8); 2017 > Article
Asian-Australasian Journal of Animal Sciences 2017;30(8): 1061-1065. doi: https://doi.org/10.5713/ajas.16.0562
Genome scan linkage analysis identifies a major quantitative trait loci for fatty acid composition in longissimus dorsi muscle in an F2 intercross between Landrace and Korean native pigs
Hee-Bok Park1, Sang-Hyun Han2, Chae-Kyoung Yoo3, Jae-Bong Lee4, Ji-Hyang Kim1, Kwang-Soo Baek1, Jun-Kyu Son1, Sang-Min Shin1, Hyun-Tae Lim3,5,*, In-Cheol Cho1,*
1Subtropical Livestock Research Institute, National Institute of Animal Science, Rural Development Administration, Jeju 63242, Korea
2Educational Science Research Institute, Jeju National University, Jeju 63243, Korea
3Institute of Agriculture and Life Sciences, Gyeongsang National University, Jinju 52828, Korea
4Korea Zoonosis Research Institute, Chonbuk National University, Iksan 54531, Korea
5Department of Animal Science, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju 52828, Korea
* Corresponding Author: Hyun-Tae Lim ,Tel: +82-55-772-1945, Fax: +82-55-772-1949, Email: s_htim@gnu.ac.kr / In-Cheol Cho ,Tel: +82-64-754-5710, Fax: +82-64-754-5713, Email: choic4753@korea.kr
Received: July 22, 2016;  Revised: October 25, 2016.  Accepted: December 29, 2016.  Published online January 2, 2017.
Hee-Bok Park and Sang-Hyun Han contributed equally to this work.

This study was conducted to locate quantitative trait loci (QTL) influencing fatty acid (FA) composition in a large F2 intercross between Landrace and Korean native pigs.
Eighteen FA composition traits were measured in more than 960 F2 progeny. All experimental animals were genotyped with 165 microsatellite markers located throughout the pig autosomes.
We detected 112 QTLs for the FA composition; Forty seven QTLs reached the genome-wide significant threshold. In particular, we identified a cluster of highly significant QTLs for FA composition on SSC12. QTL for polyunsaturated fatty acid on pig chromosome 12 (F-­value = 97.2 under additive and dominance model, nominal p­value 3.6×10–39) accounted for 16.9% of phenotypic variance. In addition, four more QTLs for C18:1, C18:2, C20:4, and monounsaturated fatty acids on the similar position explained more than 10% of phenotypic variance.
Our findings of a major QTL for FA composition presented here could provide helpful information to locate causative variants to improve meat quality traits in pigs.
Keywords: Fatty Acid; Quantitative Trait Locus; Genome­wide Linkage Analysis; Landrace; Korean Native Pigs
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