Table 2.
χ2 analysis of models of inheritance for apomixis in a population of 397 individuals and the only segregating marker (ugt204) screened in a population of 80 individuals
| Locus | Model for inheritance | Expected
|
Observed
|
χ2 | Pdf=1 | |||
|---|---|---|---|---|---|---|---|---|
| Ratio | Ni + | Ni − | Ni + | Ni − | ||||
| Apomixis | Disomic or tetrasomic, random chromosome | 1:1 | 198.5 | 198.5 | 162 | 235 | 13.42 | <0.01 |
| Tetrasomic, random chromatid | 13:15 | 184 | 213 | 162 | 235 | 4.90 | 0.03 | |
| Tetrasomic, random chromatid, gamete lethal | 12:15 | 176 | 221 | 162 | 235 | 2.00 | 0.16 | |
| ugt204 | Disomic or tetrasomic, random chromosome | 1:1 | 40 | 40 | 29 | 51 | 6.05 | 0.01 |
| Tetrasomic, random chromatid | 13:15 | 37 | 43 | 29 | 51 | 3.22 | 0.07 | |
| Tetrasomic, random chromatid, gamete lethal | 12:15 | 35.5 | 44.5 | 29 | 51 | 2.14 | 0.14 | |
Ni, number of individuals; + and −, presence and absence of the trait, respectively.