Mating plans and inbreeding
Relationship coefficients from the pedigree, sire selection that accounts for close kinship, and a culling list.
The inbreeding coefficient is computed from the pedigree by walking common ancestors. For a small population this is the central instrument: yield gained without controlling relatedness turns, within two generations, into lost fertility and vitality.
Sire selection shows not only the expected gain but the relatedness of the pair: the bull with the best index may be a grandson of the same line, and then the gain in the figure becomes a loss in the herd.
common ancestor: Progenesis Lighter, the dam’s sire
The list is sorted by index, and the warning stands on the first row: the best bull by the number is the worst choice here. This is visible only where both pedigrees lie side by side.
The list is sorted by index, and the warning stands on the first row: the best bull by the number is the worst choice here. A supplier catalogue cannot show this at all — there a bull has a single figure — it is visible only where both pedigrees lie side by side and inbreeding is computed for a calf that does not exist yet.
Limits
- The calculation runs on the recorded pedigree. An unknown ancestor understates relatedness — the system shows the completeness of the data so that the figure is not read as exact.
- There is no genomic relationship: genotypes are not stored in the book, and the coefficient is computed from documents, not from markers.
Other sections
See how it works
The Holstein book is open: every section can be opened and read on live data.