Table 1.

Expected numbers of homozygous mutations remaining in autogamous lines hybridized to an autogamous donor species containing Q = 40 homozygous mutations and backcrossed for B generations

Genome size in centiMorgans, haploid number of chromosomes	Number of backcross generations (B)	Expected number of mutations remaining in a backcross-bred variety when d donor genes are selected*
		d = 1	d = 2	d = 3
1,000; 5	5	1.8	3.0	4.2
1,000; 5	7	1.1	2.1	3.1
1,000; 5	9	0.8	1.6	2.4
3,000; 5	5	0.9	1.2	1.6
3,000; 5	7	0.5	0.8	1.1
3,000; 5	9	0.3	0.6	0.8
3,000; 10	5	1.0	1.4	1.8
3,000; 10	7	0.5	0.8	1.1
3,000; 10	9	0.3	0.6	0.8

Numbers in this table should be halved for Q = 20 mutations.

^*After B generations of backcrossing and one generation of self-fertilization.