Polymorphisms of the SYNE2 gene in small tail han Sheep. A, the detected SNP and particular primer. A total of 4 exons are included in the SYNE2 gene of sheep; B, the change of amino acids; C, the genotype and allele frequencies of the SYNE2 gene; D, the information of PIC, HE and NE; E, the test of HWE, P > 0.05 indicates the locus was in Hardy-Weinberg equilibrium.