“高产稳产”是优良品种必须具备的重要特性,也是农业生产对优良品种的基本要求。然而,品种的生产能力是遗传基因型在环境条件作用下的表现。凡品种(即基因型)因环境条件改变而引起生产能力的不同表现。在遗传学上称为基因型与环境的互作。这种互作效应的大小反映了品种(即基因型)稳定性能的高低。互作效应大,表示品种稳定性低;反之,则表示品种稳定性高。这种现象已 “High and stable yield ” is an important feature that must be possessed by fine varieties, and also the basic requirement of fine varieties for agricultural production. However, breed productivity is a manifestation of the genotype under environmental conditions. Where varieties (ie genotype) due to changes in environmental conditions caused by the production of different performance. Genetically known as genotype and the environment of interaction. The magnitude of this interaction reflects the stability of breeds (ie, genotypes). The interaction effect is large, indicating that the variety stability is low; on the contrary, the variety stability is high. This phenomenon has been