杂种优势的研究一直是植物遗传学研究的重点内容，经典的杂种优势理论如显性假说、超显性假说、上位性假说都是研究等位基因对杂种优势的作用，关于两亲本特异性区域的基因对于杂种优势的作用的研究比较少。单亲表达基因（SPE基因）是在杂交子代中只来源于一个亲本表达的基因，他们与亲本基因组的特异性区域密切相关。本研究首次同时利用两个参考基因组进行SPE基因的鉴定工作，并通过共表达网络研究SPE基因与其他差异表达基因的关系、同一个亲本来源的SPE基因的关系、不同亲本来源的SPE基因之间的关系，以期从两亲本SPE基因在杂交子代中具有互补性的角度来解释它们在水稻杂种优势中的作用。

The study of heterosis has always been the hotspot of plant genetics. The classical theories of heterosis, such as dominance hypothesis, hyperdominance hypothesis and epistasis hypothesis, always focus on the effect of allele genes on heterosis. There are few studies on the Heterosis of parents' specific regions. Single parent expression (SPE) genes are genes with only one parent's gene expressed in the hybrid offspring. They are closely related to the specific regions of the parent genome. This study is the first time to apply two reference genomes in the analysis of SPE genes, which is helpful to obtain the information of SPE genes comprehensively and accurately. Co-expression network is a powerful tool to study the relationship between genes. In this study, we will study the relationships between SPE genes and other genes, the relationships of SPE genes from the same parent and the relationships between SPE genes from different parents, expecting to explain their effects on heterosis from their complementarity in rice hybrid offspring.