Table 2. Segregation ratios of duck plumage pattern phenotypes in offspring of mating tests.
| Combinations of genotypes | No. of full-sib families examined | No. of ducks examined | Phenotypes of ducks | Expected ratio of non-spot vs. spot | χ2 value | P-value | |
|---|---|---|---|---|---|---|---|
| non-spot | spot | ||||||
| GA×GG* | 8 | 88 | 88 | - | 1:0 | - | - |
| GA×GA* | 10 | 105 | 80 | 25 | 3:1 | 0.079 | <0.80 |
| GA×GG # | 9 | 103 | 103 | - | 1:0 | - | - |
| GA×GA # | 12 | 134 | 98 | 36 | 3:1 | 0.249 | <0.70 |
*represents white plumage drake× black plumage female duck
# represents black plumage drake× white plumage female duck