TABLE 1.

One block of design of crosses between generation 17 MA lines and sublines sampled at generation 0

	Paternal lines
Maternal lines	1	2	3	4	Y	Z
1	S	X	X
2	S	X	X
3	S	X	X
4	S	X	X
Y	X	X	X	X	S
Z	X	X	X	X		S

Lines sampled in generation 17 for these crosses are designated 1–4. Sublines sampled at random from generation 0 are designated Y and Z. Lines were used as both paternal and maternal parents. X, crosses between generations; S, self-fertilization.