pure breeding line

pure breeding line

or

true breeding line

a strain of individuals that are all homozygous for the genes being considered, so that their progeny show no variation in those genes. see BREEDING TRUE.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Pedigree selection was practiced within the [F.sub.2], [F.sub.3], and [F.sub.4] segregating populations, and performance testing began in the [F.sub.4:6] generation with the advanced pure breeding line GA 962533.
The inbred is a pure breeding line resulting from up to nine generations of inbreeding and selection where undesirable aspects of the line are removed.
Researchers have traditionally had two methods to produce a pure breeding line. One requires self-fertilization of the progeny of two different parent lines over several generations, a time-consuming process that does not guarantee a pure breeding line.
Performance testing was begun in the [F.sub.4:6] generation with the advanced pure breeding line GA 982508.