The application discloses a
molecular marker, a primer, a detection method and application related to pig
muscle fiber, rib number and
back fat thickness, and relates to the technical field of molecular markers. The
molecular marker is located in a MYLPF
gene, and a sequence of the
molecular marker is shown as SEQ ID NO: 4. The sequence is located at a first
exon of a 202 transcript of the MYLPF
gene, and is used for detecting SNP site
mutation. The application determines a cause
mutation affecting the circumference, area of pig
muscle fiber, rib number and average
back fat thickness by using a MYLPF
gene promoter constructed to replace a double
luciferase reporter vector. A specific primer is designed on the
mutation site of the
promoter and amplification is performed. The site is detected for polymorphism by using a restriction
endonuclease NlaIII. According to the result of the
polymorphism detection, differences in the circumference, area of
muscle fiber, rib number and average
back fat thickness among pig individuals are distinguished, and a
large population scale sampling and determination is not needed.