A preliminary genome wide scan using a combination of 100 microsatellite and 355 single nucleotide polymorphism (SNP) markers detected four QTL regions for ultrasound backfat on BTA5 (93 to 103 cM), BTA12 (75 to 99 cM), BTA15 (18 to 34 cM) and BTA17 (64 to 68 cM), four QTL regions for carcass grade fat on BTA12 (50 to 54 cM), BTA13 (42 to 54 cM), BTA14 (24 to 38 cM) and BTA15 (32 to 44 cM), and three QTL regions for carcass average fat on BTA12 (50 to 60 cM), BTA13 (42 to 54 cM), and BTA15 (32 to 44 cM) at a chromosome-wise significance level of P<0.05. The average contribution of the significant QTL to the total phenotypic variance ranged from 4.2% to 6.4%, with an average of 5.5%.

C. Li, J. D Nkrumah, R. Bartusiak, A. Fu, B. M Murdoch, E. L Sherman, S. D McKay, Z. Wang, D. H Crews, S. S Moore

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume , , 03.53, 2006
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