中文摘要：

为了确定玉米代谢通路中2个亚基因组基因的分化情况，对玉米和高粱进行了共线性分析，确定了玉米的2个亚基因组Maize1和Maize2基因组成，统计了玉米所有407个代谢通路中的亚基因组基因保留情况，并对它们的基因长度进行了双样本均值分析（Z-检验）和通路中2个亚基因组基因保留情况进行χ2检验。结果表明，Maize1、Maize2的基因长度没有显著的差异；基因保留具有显著差异的通路大约占总代谢通路的4．4％，作为亚基因组，Maize2在全局上受到更大基因丢失的影响，有更多的DNA丢失，而Maize1相对保留了更多的代谢基因，拥有更大的表达量。

英文摘要：

In order to understand the differential difference of 2 subgenomes in maize,the colinearity analysis of maize and sorghum was conducted to determine the gene compositon of subgenomes Maize1 and Maize2. The number of subgenomic genes in all the 407 metabolic pathways of maize was counted up. The double-sample mean （Z-test） analysis for the gene length and the ehisquare test for the rentation of two subgenomic genes in the pathways were carried out. The result showed that there was no significant difference of gene length between Maizel and Maize2;the pathways with remarkable difference in gene rentation were about 4.4% in the total metabolic pathways,the Maize2 （as subgenome） had been affected more by gene loss in the global and lost more DNA, while the Maizel relatively reserved more metabolic genes and had more expression level.