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单株表现的一致性与无竞争条件下基因间的正互作密切相关．基因间的正互作可引起遗传上的过度补偿，具体表现为单株产量分布的均值和众数右移，个体稳定性提高。相反，基因间的负互作会引起遗传上的补偿不足，具体表现为单株产量分布的均值和众数左移，个体稳定性降低。基因间的正互作及相伴而生的个体稳定性的提高是两种性质不同的基因组在质量上互补（杂交品种）或两种相同的基因组在数量上互补（纯系品种）的结果。数量上的基因组互补，指的是一步一步的组合，每次都从将品质、生产力和稳产性高度结合起来的杂种开始。从这个意义上讲，育种可以被看作是数量基因组互补的不断开发利用，目的是培育杂交种，或培育供进一步增强基因组组合的育种材料。
The consistency of the performance of the plants is closely related to the positive interaction between genes under noncompetitive conditions. Positive inter-gene interactions can cause genetic overcompensation, which is manifested by the shift of the mean and mode of single-plant yield distribution and the improvement of individual stability. On the contrary, the negative interaction between genes will cause genetic compensation deficiencies, which are manifested as the shift of the mean and mode of single-plant yield distribution and the decrease of individual stability. The positive inter-gene interaction and the accompanying increase in individual stability are the result of the qualitative complementation (hybrids) or the complementation of two identical genomes (pure lines) of two different nature of the genome. Quantitative genomic complementation refers to a step-by-step combination that begins each time with hybrids that combine high levels of quality, productivity and stability. In this sense, breeding can be viewed as the ongoing development of complementary genomics to breed hybrids or to breed breeding materials that further enhance the genomics portfolio.