Table 4. Genetic transmission pattern of ev21-related K specific sequences through crossbreeding test between early- and late-feathering Korean native chickens
| Parental mating combinations1 | Families | Number of offspring |
| Total | Males | Females |
| EF (PCR −)2 | LF (PCR +) | EF (PCR −) | LF (PCR +) |
| LF (♂) × EF (♀) | LE1 | 16 | 3 (3) | 5 (5) | 2 (2) | 6 (6) |
| LE2 | 11 | 1 (1) | 2 (2) | 3 (3) | 5 (5) |
| LE3 | 13 | 4 (4) | 3 (3) | 2 (2) | 4 (4) |
| LE4 | 18 | 4 (4) | 5 (5) | 3 (3) | 6 (6) |
| LE5 | 21 | 2 (2) | 7 (7) | 4 (4) | 8 (8) |
| LF (♂) × LF (♀) | LL1 | 15 | 0 (0) | 9 (9) | 4 (4) | 2 (2) |
| LL2 | 19 | 0 (0) | 11 (11) | 5 (5) | 3 (3) |
| LL3 | 21 | 0 (0) | 10 (10) | 7 (7) | 4 (4) |
| LL4 | 23 | 0 (0) | 11 (11) | 0 (0) | 12 (12) |
| LL5 | 29 | 0 (0) | 15 (15) | 0 (0) | 14 (14) |
| EF (♂) × LF (♀) | EL1 | 17 | 0 (0) | 8 (8) | 9 (9) | 0 (0) |
| EL2 | 15 | 0 (0) | 8 (8) | 7 (7) | 0 (0) |
| EL3 | 17 | 0 (0) | 7 (7) | 10 (10) | 0 (0) |
| EL4 | 18 | 0 (0) | 10 (10) | 8 (8) | 0 (0) |
| EL5 | 20 | 0 (0) | 11 (11) | 9 (9) | 0 (0) |
| EF (♂) × EF (♀) | EE1 | 19 | 9 (9) | 0 (0) | 10 (10) | 0 (0) |
| EE2 | 15 | 8 (8) | 0 (0) | 7 (7) | 0 (0) |
| EE3 | 20 | 11 (11) | 0 (0) | 9 (9) | 0 (0) |
| EE4 | 12 | 7 (7) | 0 (0) | 5 (5) | 0 (0) |
| EE5 | 14 | 6 (6) | 0 (0) | 8 (8) | 0 (0) |
“EF” denotes early-feathering chickens, while “LF” signifies late-feathering chickens.
Numbers represent the number of phenotypic chickens, and numbers in parentheses represent the number of positive (PCR+) and negative bands (PCR−) obtained by PCR.