Table 1.

Summary of gene duplication and deletion under three population size treatments

Population size	Duplications*	Genes duplicated†	μduplication‡	Deletions*	Genes deleted§	μdeletion¶
N = 1	48	3,316	2.88 × 10−5	44	588	0.50 × 10−5
N = 10	30	97	0.10 × 10−5	15	27	0.03 × 10−5
N = 100	16	42	0.08 × 10−5	15	45	0.06 × 10−5

Mutation rate estimates for the N = 1 populations represents the spontaneous rate of origin of gene duplications and deletions with minimal influence of selection. Rate estimates for the N = 10 and 100 populations denote copy-number changes with increasing intensity of natural selection.

^*Number of events.

^†Total number of genes duplicated.

^‡Rate of duplication (/gene per generation).

^§Total number genes deleted.

^¶Rate of deletion (/gene per generation).