Table 5.
Test for Free versus Linked Recombination of Ait, Apv, Pit, and Ppv within the 2(S1 × A17) Family by Comparison of the Observed and Expected (in Parenthesis) Segregation Ratios for the Six Combinations of Gene Pairs (for Genetic Constitution of the Parents, See Table 3 or Figure 2)
| Genetic Constitution on the Two Locia
|
||||||
|---|---|---|---|---|---|---|
| Gene Pairs | d/d | d/r | r/d | r/r | χ2 | Significanceb |
| Ait/Apv | 30 (5) | 7 (1) | 14 (5) | 7 (1) | 7.63 | ns |
| Ait/Pit | 21 (1) | 16 (1) | 6 (1) | 15 (1) | 8.07 | * |
| Ait/Ppv | 35 (1) | 2 (0) | 21 (1) | 0 (0) | ∞/3.50 | ***/nsc |
| Apv/Pit | 21 (5) | 23 (5) | 6 (1) | 8 (1) | 2.83 | ns |
| Apv/Ppv | 44 (5) | 0 (0) | 12 (1) | 2 (0) | ∞/0.91 | ***/nsc |
| Pit/Ppv | 25 (1) | 2 (0) | 31 (1) | 0 (0) | ∞/0.64 | ***/nsc |
a
d, dominant; r, recessive alleles.
b
ns, *, and ***, not significant, P < 0.05, and P < 0.001.
c
The significant deviation of the observed from the expected segregation 2 (0) may be caused by chromatid segregation of the postulated 3Ppv1ppv genetic constitution; excluding these cases, the segregation does not differ significantly.