An F2 population established by crossing European Large White (small, erect ears) with Chinese Meishan (large, flop ears) was used to study the genetic architecture of the two ear traits for the first time. QTLs were found on pig chromosome (SSC) 1, 5, 7, 9 and 12 affecting both traits. The QTLs on SSC5 and SSC7 had major effects and were significant at the genome-wide level (P<0.01). The QTL on SSC1 for ear aspect also had a major effect and was genome-wide significant (P<0.01). Three additional suggestive QTLs affecting ear size but not ear aspect were detected on SSC6, SSC8 and SSC15. This study provided initial insights on the complex genetic architecture underlying pig ear traits and will facilitate positional candidate gene analysis in future studies.

W. Wei, D. J de Koning, J. C Penman, H. A Finlayson, Alan L Archibald, Chris S Haley

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume , , 06.21, 2006
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