Juvenile hormone acid methyltransferase gene SNP marker for identifying rapid growth traits of litopenaeus vannamei and application of juvenile hormone acid methyltransferase gene SNP marker

The invention discloses a juvenile hormone acid methyltransferase gene SNP (Single Nucleotide Polymorphism) marker for identifying rapid growth traits of litopenaeus vannamei and application of the juvenile hormone acid methyltransferase gene SNP marker. The gene is located at the 751 site of the JHAMT gene sequence of the litopenaeus vannamei, and the mutation types are C homozygosis, A/C heterozygosis and A homozygosis; the homozygous C is C/C, and the homozygous A is A/A. The invention provides the SNP site for distinguishing the growth speed of the litopenaeus vannamei, and develops four primers for amplifying the genotype of the SNP site and a detection method for detecting the SNP genotype, and by utilizing the method, the polymorphic form of the site can be simply, quickly and accurately detected at low cost, and the detection result is accurate. The method can be used for accurately screening fast-growing parent prawn individuals and breeding groups of the litopenaeus vannamei and maintaining fast-gro