12. Glossary

Just as birds have wings, man has language. -- George Henry Lewes
This chapter provides a glossary of terms.12.1
ancestor loss coefficient
See: pedigree completeness.
coefficient of ancestral inbreeding
The probability that an individual jas inherited an allele that has undergone inbreeding in the past at least once.
coefficient of inbreeding
Probability that two alleles selected at random are identical by descent.
coefficient of partial inbreeding
The probability that the alleles at an arbitrary locus in an individual are identitical-by-descent, and that the alleles were derived from an allele in a particular founder.
coefficient of relationship
Proportion of genes that two individuals share on average.
effective ancestor number
The number of equally-contributing ancestors, not necessarily founders, needed to produce a population with the heterozygosity of the studied population [Boichard, Maignel, and VerrierBoichard et al.1997].
effective founder number
The number of equally-contributing founders needed to produce a population with the heterozygosity of the studied population [LacyLacy1989].
effective population size
The effective population size is the size of an ideal population that would lose heterozygosity at a rate equal to that of the studied population [Falconer and MacKayFalconer and MacKay1996].
An animal with unknown parents that is assumed to be unrelated to all other founders.
internal report
A PyPedal() report that is intended for use by other PyPedal() procedures, such as plotting routines, and not for printing.
numerator relationship matrix
Matrix of additive genetic covariances among the animals in a population.
A PyPedal pedigree consists of a Python list containing instances of PyPedal NewAnimal() objects.
pedigree completeness
The proportion of known pedigree information for an arbitrary number of generations.
Many calculations require that the animals in a pedigree be ordered from oldest to youngest, with sires and dams preceding offspring, and renumbered starting with 1. This is a computational necessity, and results in an animal's ID (animalID) being changed to reflect that animal's order in the pedigree. All animals have their original IDs stored in their originalName attribute.
The process of arranging animals in a pedigree so that parents appear before their offspring; this is a necessary step in renumbering a pedigree.


... terms.12.1
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