Figure 3.6.The pedigree of an oat variety named “Goslin.” The parents of the cross from which
Goslin was selected are shown on the left in column 1, grandparents and great-grandparents are
shown in columns 2 and 3, and so on. Lines identified by numbers (e.g., OA952-3) were probably
elite breeding lines that did not become varieties. This pedigree tree was drawn using an online data-
base (http://avena.agr.gc.ca) that records pedigrees of historical oat varieties for many generations.
See color insert.
Figure 3.7.Mean oil content for oat lines representing nine cycles of recurrent selection evaluated in
three Iowa locations in 1992 [from Frey and Holland (1999)].
3.2. CENTRAL CONCEPTS IN PLANT BREEDING 59