PURPOSE: A gene marker and a method for diagnosing pork quality are provided to remarkably improve genetic ability of a breeding pig and to enhance pig selection accuracy. CONSTITUTION: A marker for diagnosing pork quality is a polynucleotide containing 8-500 continuous nucleotides containing SNP or a complementary polynucleotide thereof among polynucleotides selected sequence numbers 1-17. The SNP exists at 61th base of each sequence. A microarray for diagnosing pork quality contains the polynucleotide, a polypeptide encoded by the polynucleotide, or cDNA of the nucleotide. A method for determining pork quality comprises: a step of providing isolated nucleic acid samples; and a step of determining allele of each SNP of one or more polynucleotides selected from sequence numbers 1-17.
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