玉米产量形成与源库关系

Relationship Between Maize Yield Formation and Source-sink

研究表明,源库均影响玉米的产量。在不同基因型间源库特性存在差异,而基因型的源库性状表达又受到环境条件的限制和栽培措施的调控。基因型与环境条件之间原有的平衡关系,因新品种应用而打破,需要通过栽培措施调节环境条件,以满足品种遗传潜力发挥的要求,即通过栽培措施调节源库关系来协调个体与群体矛盾,从而在基因型与环境条件间建立新的平衡关系。产量形成过程中,产量的提高和潜力的发挥是作物与环境相互作用的调节过程,表现在源库平衡关系中,源是主导因素,库随源的变化进行调整,达到源库新的平衡。因此,源库不平衡是绝对的,平衡是相对的。

The study indicated that source and sink traits all affected the yield of maize. The traits of source and sink were different between different genotypes, and their expressions were limited by environment condition and regulated by culture measure. The balance of the original relation between genotype and environment was changed by the use of new cuhivar. And the environmental condition should be regulated by means of cultivation measure to meet the need of variety the hereditary potential into play, i.e. regulating the source-sink relation to coordinating the contradic- tion between individual and population by means of cultivation measure. Thus establishes the new balance of source-sink relations between the genotype and environmental condition. In the formation of yield, the increasing of yield and to bring the yield potential into play is the regulation duration of crop and the environment interaction. In the relation of source-sink balance, the source is the dominant factor, and the sink adjusts along with the changing of source to achieve the new balance between source and sink. Therefore, unbalance is absolutely, and balance is relatively.