Table 1.
Source of data for analysis I and analysis II
| Experiment | Breed composition | N | Singles/Twins | Analysis I | Analysis II |
|---|---|---|---|---|---|
| 1953 | Hereford | 6 | Twins | No | Yes |
| 1954 | Hereford | 8 | Twins | No | Yes |
| 1959 | Hereford | 8 | Twins | No | Yes |
| 1964 | Hereford | 33 | Twins | Yes | Yes |
| Hereford x Guernsey | 1 | Twins | Yes | Yes | |
| Hereford x Shorthorn | 1 | Twins | Yes | Yes | |
| Hereford x Holstein | 1 | Twins | Yes | Yes | |
| Hereford x Brown Swiss | 1 | Twins | Yes | Yes | |
| 1969 | Hereford | 17 | Twins | Yes | Yes |
| Hereford x Shorthorn | 2 | Twins | Yes | Yes | |
| Hereford x Charolais | 2 | Twins | Yes | Yes | |
| Holstein | 24 | Twins | Yes | Yes | |
| 1974 | Hereford x Holstein | 14 | Singles | Yes | Yes |
| Angus x Holstein | 14 | Singles | Yes | Yes | |
| Simmental x Holstein | 15 | Singles | Yes | Yes | |
| Chianina x Holstein | 13 | Singles | Yes | Yes |