Abstract
The objective of this study was to analyse genetic mutations in the swine odorant binding protein (OBP), map them on the swine genome, and to investigate the association between genetic variants and growth traits. The tissue sample of intramuscular fat from 10 individuals for each growth stage (0, 90, 150, and 210 days) was used to analyse expression levels of OBP gene, resulting in the highest expression levels at day 90. Sequencing analysis of 307 purebred Yorkshire pigs revealed eight single nucleotide polymorphisms, and the sequence was submitted into the GenBank with an accession number (FJ222446). The SNPs at positions 333 and 508 located in an intron region accounted for significant variation of average daily gain. The analysis of radiation hybrid mapping confirmed a location of the swine OBP gene on chromosome 7 between markers S0064 (475.6 cM) and S0025 (497.4 cM) based on the Sus scrofa radiation hybrid and United States Department of Agriculture swine maps. It is concluded that the identified single nucleotide polymorphism may be used as a useful genetic marker associated with average daily gain.
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