Table 3.
The genotype distribution and allele frequencies of TYR gene SNPs locus
| SNPs | Genotype | Phenotype class | Total | Frequency/% | χ2 value | ||||
|---|---|---|---|---|---|---|---|---|---|
| Black | White | Gray | Black-speckle | Horizontal spot | |||||
| SNP4 (C47G) | CC | 44 (0.176) | 45 (0.18) | 41 (0.164) | 39 (0.156) | 50 (0.2) | 210 | 84.0 |
χ2 = 4.15 p < 0.05 |
| CG | 5 (0.02) | 5 (0.02) | 6 (0.024) | 9 (0.036) | 0 (0) | 25 | 10.0 | ||
| GG | 1 (0.004) | 9 (0.036) | 3 (0.012) | 2 (0.008) | 0 (0) | 15 | 6.00 | ||
| Total | 50 | 50 | 50 | 50 | 50 | 250 | 100 | ||
| C | 93 | 77 | 88 | 87 | 100 | 445 | 89.0 | ||
| G | 7 | 23 | 12 | 13 | 0 | 55 | 11.0 | ||
| SNP5 (T120C) | TT | 50 (0.2) | 45 (0.18) | 45 (0.18) | 34 (0.136) | 48 (0.192) | 222 | 88.8 |
χ2 = 6.88 p < 0.05 |
| TC | 0 (0) | 5 (0.02) | 5 (0.02) | 11 (0.044) | 2 (0.008) | 23 | 9.2 | ||
| CC | 0 (0) | 0 (0) | 0 (0) | 5 (0.02) | 0 (0) | 5 | 2.0 | ||
| Total | 50 | 50 | 50 | 50 | 50 | 250 | 100 | ||
| T | 100 | 95 | 95 | 79 | 98 | 467 | 93.4 | ||
| C | 0 | 5 | 5 | 21 | 2 | 33 | 6.6 | ||
| SNP6 (T172C) | TT | 35 (0.14) | 45 (0.18) | 35 (0.14) | 30 (0.12) | 0 (0) | 145 | 58.0 |
χ2 = 6.71 p < 0.05 |
| TC | 11 (0.044) | 5 (0.02) | 8 (0.032) | 15 (0.06) | 27 (0) | 66 | 26.4 | ||
| CC | 4 (0.016) | 0 (0) | 7 (0.028) | 5 (0.02) | 23 (0) | 39 | 15.6 | ||
| Total | 50 | 50 | 50 | 50 | 50 | 250 | 100 | ||
| T | 81 | 95 | 78 | 75 | 27 | 356 | 71.2 | ||
| C | 19 | 5 | 22 | 25 | 73 | 144 | 28.8 | ||