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
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