中文摘要：

异色瓢虫Harmonia axyridis （Pallas），在亚洲地区是一种十分重要的捕食性天敌昆虫.从上个世纪起，异色瓢虫在遗传学、进化论学说、种群动态学、生物防治等多个领域被人们广泛研究.异色瓢虫鞘翅色斑变异为科学家长期关注和研究的热点，色斑变异主要是其黑色部分（含黑色素）和非黑色部分（含类胡萝卜素衍生物）的分布范围与布局发生了更动.同时，不同色斑由一系列复等位基因所控制，表现为镶嵌显性遗传，镶嵌显性是控制黑色素形成的基因起支配作用；另外，外界一些环境因素也可能导致异色瓢虫鞘翅色斑多样，例如鞘翅色斑的频率可随季节的变化而变化.文章对引起异色瓢虫鞘翅色斑变异的各方面原因进行了分析研究和探讨.

英文摘要：

Harmonia axyridis （Pallas） is a well-known aphid predator in its native Asian range. Throughout the last century, H. axyridis has been studied quite extensively in the fields of genetics, evolution, population dynamics and biological preventive treatment. Scientists have focused on the stain variation of H. Axyridis＇s elytron for a long time, the main reason for which is the distribution and layout of black parts （including melanin） and non-black parts （including carotenoids） have changed. Simultaneously, different stains are controled by a series of multiple alleles, which reflects as mosaic dominance heredity. Mosaic dominance controls the formatin of melanin. Besides, envionmental factors may also influence the variation, such as the frequency of elytron stains is related with the season changes. This paper analyzed and discussed the reasons for the stain variation of H. axyridis＇s elytron.